$SASR
Sandy Spring Bancorp Inc Stock $sasr

$sasr Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000082441021000017 Filed on February 19, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$111.8M	$85.39M	$87.08M
YoY Change	30.92%	-0.25%	3.21%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$5.000M	$3.400M	$3.300M
YoY Change	47.06%	6.25%	3.12%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$11.96M	$19.81M	$20.29M
YoY Change	-39.6%	1.77%	20.91%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$74.89M	$37.07M	$38.91M
YoY Change	102.02%	8.7%	1.49%
Income Tax	$18.23M	$8.614M	$9.531M
% Of Pretax Income	24.34%	23.24%	24.49%
Net Earnings	$56.66M	$28.46M	$29.38M
YoY Change	99.11%	11.31%	0.51%
Net Earnings / Revenue	50.69%	33.33%	33.74%
Basic Earnings Per Share	$1.19	$0.80	$0.82
Diluted Earnings Per Share	$1.19	$0.80	$0.82
COMMON SHARES
Basic Shares Outstanding	47.04M shares	35.63M shares	35.85M shares
Diluted Shares Outstanding			35.90M shares

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$362.8M	$197.9M	$261.9M
YoY Change	83.3%	13.17%
Cash & Equivalents	$297.0M	$146.1M	$209.9M
Short-Term Investments	$65.76M	$51.80M	$51.94M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$57.72M	$58.62M	$59.49M
YoY Change	-1.53%	-5.37%	-4.05%
Goodwill	$370.2M	$347.1M	$347.1M
YoY Change	6.65%	0.0%	0.5%
Intangibles	$32.52M	$7.841M	$8.322M
YoY Change	314.76%	-19.89%	-19.42%
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$12.80B	$8.629B	$8.438B
YoY Change	48.32%	4.68%	5.02%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$71.00M	$42.00M	$44.00M
YoY Change	69.05%	-10.64%	-6.38%
Accrued Expenses	$75.00M	$77.00M	$79.00M
YoY Change	-2.6%
Deferred Revenue
YoY Change
Short-Term Debt	$543.0M	$214.0M	$126.0M
YoY Change	153.74%	-34.56%	-11.89%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$146.0M	$119.0M	$123.0M
YoY Change	22.69%	153.19%	161.7%
LONG-TERM LIABILITIES
Long-Term Debt	$227.0M	$209.0M	$37.00M
YoY Change	8.61%	464.86%	0.0%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$227.0M	$209.0M	$37.00M
YoY Change	8.61%	464.86%	0.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$146.0M	$119.0M	$123.0M
Total Long-Term Liabilities	$227.0M	$209.0M	$37.00M
Total Liabilities	$11.33B	$7.496B	$7.297B
YoY Change	51.13%	4.47%	4.37%
SHAREHOLDERS EQUITY
Retained Earnings	$557.3M	$515.7M	$498.0M
YoY Change	8.06%	16.8%	16.91%
Common Stock	$894.0M	$621.6M	$644.7M
YoY Change	43.82%	-3.19%	0.56%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.470B	$1.133B	$1.140B
YoY Change
Total Liabilities & Shareholders Equity	$12.80B	$8.629B	$8.438B
YoY Change	48.32%	4.68%	5.02%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	$56.66M	$28.46M	$29.38M
YoY Change	99.11%	11.31%	0.51%
Depreciation, Depletion And Amortization	$5.000M	$3.400M	$3.300M
YoY Change	47.06%	6.25%	3.12%
Cash From Operating Activities	$59.70M	$57.00M	$11.70M
YoY Change	4.74%	30.43%	-76.36%
INVESTING ACTIVITIES
Capital Expenditures	-$1.600M	-$800.0K	-$1.800M
YoY Change	100.0%	-57.89%	5.88%
Acquisitions
YoY Change
Other Investing Activities	-$55.70M	-$290.6M	-$35.50M
YoY Change	-80.83%	50.8%	-70.54%
Cash From Investing Activities	-$57.30M	-$291.5M	-$37.30M
YoY Change	-80.34%	49.87%	-69.5%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	69.70M	170.7M	3.800M
YoY Change	-59.17%	-1.67%	-102.65%
NET CHANGE
Cash From Operating Activities	59.70M	57.00M	11.70M
Cash From Investing Activities	-57.30M	-291.5M	-37.30M
Cash From Financing Activities	69.70M	170.7M	3.800M
Net Change In Cash	72.10M	-63.80M	-21.80M
YoY Change	-213.01%	-379.82%	-89.92%
FREE CASH FLOW
Cash From Operating Activities	$59.70M	$57.00M	$11.70M
Capital Expenditures	-$1.600M	-$800.0K	-$1.800M
Free Cash Flow	$61.30M	$57.80M	$13.50M
YoY Change	6.06%	26.75%	-73.63%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000824410
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CY2020Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	sasr:AccruedInterestPayableAndOtherLiabilities
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	0-19065
CY2020	dei	Entity Registrant Name EntityRegistrantName	SANDY SPRING BANCORP, INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	52-1532952
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	17801 Georgia Avenue
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Olney
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	MD
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	20832
CY2020	dei	City Area Code CityAreaCode	301
CY2020	dei	Local Phone Number LocalPhoneNumber	774-6400
CY2020	dei	Security12b Title Security12bTitle	Common Stock, par value $1.00 per share
CY2020	dei	Trading Symbol TradingSymbol	SASR
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2018	us-gaap	Professional Fees ProfessionalFees	6056000	USD
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	30603000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	20426000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	19492000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	255782000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	179085000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	179783000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	124424000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	152861000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	132688000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27471000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36428000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31824000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	96953000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	116433000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	100864000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.19
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.25
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.82
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.18
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.25
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.82
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.20
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.18
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.10
CY2020	us-gaap	Net Income Loss NetIncomeLoss	96953000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	116433000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	100864000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	32950000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	14429000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-9925000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	8428000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	3742000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	467000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	77000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	190000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	120000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	20000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	50000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	24175000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	10630000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-7465000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-1542000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	1175000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	135000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-404000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	383000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	90000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-1138000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	792000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	45000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	23037000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	11422000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-7420000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	119990000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	127855000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	93444000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	563816000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	100864000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-7420000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	93444000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.10
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	39277000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2645000	USD
CY2018	us-gaap	Stock Issued During Period Shares Acquisitions StockIssuedDuringPeriodSharesAcquisitions	11446197	shares
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	446640000	USD
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	20888	shares
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	441000	USD
CY2018	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	28996	shares
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	954000	USD
CY2018	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	38360	shares
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-760000	USD
CY2018	sasr	Reclassification Of Tax Effects From Other Comprehensive Income ReclassificationOfTaxEffectsFromOtherComprehensiveIncome	0	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1067903000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	116433000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	11422000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	127855000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.18
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	42272000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3042000	USD
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	15080	shares
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	334000	USD
CY2019	sasr	Stock Issued During Period Shares Director Stock Purchase Plan StockIssuedDuringPeriodSharesDirectorStockPurchasePlan	867	shares
CY2019	sasr	Stock Issued During Period Value Director Stock Purchase Plan StockIssuedDuringPeriodValueDirectorStockPurchasePlan	30000	USD
CY2019	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	37091	shares
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1069000	USD
CY2019	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	54789	shares
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-703000	USD
CY2019	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	668191	shares
CY2019	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	24284000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1132974000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	96953000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	23037000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	119990000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.20
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	53175000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3850000	USD
CY2020	us-gaap	Stock Issued During Period Shares Acquisitions StockIssuedDuringPeriodSharesAcquisitions	12768949	shares
CY2020	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	289089000	USD
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	26063	shares
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	316000	USD
CY2020	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	3611000	USD
CY2020	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	65337	shares
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1681000	USD
CY2020	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	46386	shares
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-458000	USD
CY2020	sasr	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	Adoption of ASC 326 - Financial Instruments - Credit Losses
CY2020	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	820328	shares
CY2020	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	25702000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1469955000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	96953000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	116433000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	100864000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	19873000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	13398000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	12516000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	85669000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	4684000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	9023000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	3850000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	3042000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	2645000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-29568000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1719000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5655000	USD
CY2020	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	1576865000	USD
CY2019	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	887216000	USD
CY2018	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	416337000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	1585690000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	869294000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	441023000	USD
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	33418000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	13006000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	11699000	USD
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-32000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-173000	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-200000	USD
CY2020	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	467000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	77000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	190000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-269000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	USD
CY2020	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	133000	USD
CY2019	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-92000	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-299000	USD
CY2020	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	15499000	USD
CY2019	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-1327000	USD
CY2018	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2622000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1500000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3664000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-5020000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	1704000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-5804000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-2721000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-2660000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	721000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-3970000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	141981000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	99943000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	147646000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	3553000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	21586000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	8784000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	633741000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	326604000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	161349000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	121357000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	2926000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	117354000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	441672000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	199652000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	106114000	USD
CY2020	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	1174467000	USD
CY2019	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	134012000	USD
CY2018	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	641521000	USD
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	60000	USD
CY2019	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	324000	USD
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1151000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	0	USD
CY2019	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	0	USD
CY2018	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	59945000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	26925000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5041000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5148000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	10401000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1200196000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-241276000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-505004000	USD
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1270328000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	525439000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	340376000	USD
CY2020	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	329552000	USD
CY2019	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-113824000	USD
CY2018	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	201184000	USD
CY2020	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	400000000	USD
CY2019	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	2298000000	USD
CY2018	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	5477000000	USD
CY2020	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	703117000	USD
CY2019	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	2457834000	USD
CY2018	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	5633579000	USD
CY2020	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	10310000	USD
CY2019	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
CY2018	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1997000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1433000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1395000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	458000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	703000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	760000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	25702000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	101481000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	62637000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	24284000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	53175000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	42272000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	39277000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1209115000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	185955000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	346339000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	150900000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	44622000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-11019000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	146103000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	101481000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	112500000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	297003000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	146103000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	84448000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	60504000	USD
CY2020	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	3755000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	56430000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	33795000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	25664000	USD
CY2020	sasr	Transfer From Loans To Residential Mortgage Loans Held For Sale TransferFromLoansToResidentialMortgageLoansHeldForSale	0	USD
CY2019	sasr	Transfer From Loans To Residential Mortgage Loans Held For Sale TransferFromLoansToResidentialMortgageLoansHeldForSale	0	USD
CY2018	sasr	Transfer From Loans To Residential Mortgage Loans Held For Sale TransferFromLoansToResidentialMortgageLoansHeldForSale	60043000	USD
CY2020	sasr	Loans Transferred From Loans To Other Real Estate Owned LoansTransferredFromLoansToOtherRealEstateOwned	70000	USD
CY2019	sasr	Loans Transferred From Loans To Other Real Estate Owned LoansTransferredFromLoansToOtherRealEstateOwned	414000	USD
CY2018	sasr	Loans Transferred From Loans To Other Real Estate Owned LoansTransferredFromLoansToOtherRealEstateOwned	289000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, in addition to affecting the reported amounts of revenues earned and expenses incurred during the reporting period. Actual results could differ from those estimates. Estimates that could change significantly relate to the provision for credit losses and the related allowance, potential impairment of goodwill or other intangible assets, valuation of investment securities and the determination of whether available-for-sale debt securities with fair values less than amortized costs are impaired and require an allowance for credit losses, valuation of other real estate owned ("OREO"), valuation of share based compensation, the assessment that a liability should be recognized with respect to any matters under litigation, the calculation of current and deferred income taxes, and the actuarial projections related to pension expense and the related liability.</span></div>
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Allowance for Credit Losses (in accordance with ASC 326)</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The allowance for credit losses (“allowance” or “ACL”) represents an amount which, in management's judgment, represents the lifetime expected credit losses that may be sustained on outstanding loans at the statement of condition date based on the evaluation of the size and current risk characteristics of the loan portfolio, past events, current conditions, reasonable and supportable forecasts of future economic conditions and prepayment experience. The allowance is measured and recorded upon the initial recognition of a financial asset. The allowance is reduced by charge-offs, net of recoveries of previous losses, and is increased or decreased by a provision for credit losses, which is recorded as a current period expense.</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Determination of the appropriateness of the allowance is inherently complex and requires the use of significant and highly subjective estimates. The reasonableness of the allowance is reviewed periodically by the Risk Committee of the board of directors and formally approved quarterly by that same committee of the board.</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company’s methodology for estimating the allowance includes: (1) a collective quantified reserve that reflects the Company’s historical default and loss experience adjusted for expected economic conditions throughout a reasonable and supportable period and the Company’s prepayment and curtailment rates; (2) collective qualitative factors that consider concentrations of the loan portfolio, expected changes to the economic forecasts, large relationships, early delinquencies, and factors related to credit administrations, including, among others, loan-to-value ratios, borrowers’ risk rating and credit score migrations; and (3) individual allowances on collateral-dependent loans where borrowers are experiencing financial difficulty or when the Company determines that foreclosure is probable. The Company excludes accrued interest from the measurement of the allowance as the Company has a non-accrual policy to reverse any accrued, uncollected interest income as loans are moved to non-accrual status.</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Loans are pooled into segments based on the similar risk characteristics of the underlying borrowers, in addition to consideration of collateral type, industry and business purpose of the loans. Portfolio segments used to estimate the allowance are the same as portfolio segments used for general credit risk management purposes. Refer to Note 5 for more details on the Company’s portfolio segments.</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company applies two calculation methodologies to estimate the collective quantified component of the allowance: discounted cash flows method and weighted average remaining life method. Allowance estimates on commercial acquisition, development and construction (“AD&C”) and residential construction segments are based on the weighted average remaining life method. Allowance estimates on all other portfolio segments are based on the discounted cash flows method. Segments utilizing the discounted cash flows method are further sub-segmented into risk level pools, determined either by risk rating for commercial loans or Beacon Scores ranges for residential and consumer loans. To better manage risk and reasonably determine the sufficiency of reserves, this segregation allows the Company to monitor the allowance component applicable to higher risk loans separate from the remainder of the portfolio. Collective calculation methodologies utilize the Company’s historical default and loss experience adjusted for economic forecasts. The reasonable and supportable forecast period represents a two-year economic outlook for the applicable economic variables. Following the end of the reasonable and supportable forecast period expected losses revert back to the historical mean over the next two years on a straight-line basis. Economic variables that have the most significant impact on the allowance include: unemployment rate, house price index and number of business bankruptcies. Contractual loan level cash flows within the discounted cash flows methodology are adjusted for the Company’s historical prepayment and curtailment rate experience.</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The individual reserve assessment is applied to collateral dependent loans where borrowers are experiencing financial difficulty or when the Company determines that a foreclosure is probable. The determination of the fair value of the collateral depends on whether a repayment of the loan is expected to be from the sale or the operation of the collateral. When a repayment is expected from the operation of the collateral, the Company uses the present value of expected cash flows from the operation of the collateral as the fair value. When the repayment of the loan is expected from the sale of the collateral the fair value of the collateral is based on an observable market price or the collateral’s appraised value, less estimated costs to sell. Third-party appraisals used in the individual reserve assessment are conducted at least annually, or more frequently if deemed necessary, with underlying assumptions that are reviewed by management. Internal evaluations of collateral value are conducted quarterly to ensure any further deterioration of the collateral value is recognized on a timely basis. During the individual reserve assessment, management also considers the potential future changes in the value of the collateral over the remainder of the loan’s remaining life. The Company may receive updated appraisals which contradict the preliminary determination of fair value used to establish an individual allowance on a loan. In these instances the individual allowance is adjusted to reflect the Company’s evaluation of the updated appraised fair value. In the event a loss was previously confirmed and the loan was charged down to the estimated fair value based on a previous appraisal, the balance of partially charged-off loans are not subsequently increased, but could be further decreased depending on the direction of the change in fair value. Payments on fully or partially charged-off loans are accounted for under the cost-recovery method. Under this method, all payments received are applied on a cash basis to reduce the entire outstanding principal balance, then to recognize a recovery of all previously charged-off amounts before any interest income may be recognized. Based on the individual reserve assessment, if the Company determines that the fair value of the collateral is less than the amortized cost basis of the loan, an individual allowance will be established measured as the difference between the fair value of the collateral (less costs to sell) and the amortized cost basis of the loan. Once a loss has been confirmed, the loan is charged down to its estimated fair value.</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Large groups of smaller non-accrual homogeneous loans, including residential permanent and construction mortgages and consumer installment loans, are not individually evaluated for allowance. These portfolios are reserved for on a collective basis using historical loss rates of similar loans over the weighted average life of each pool.</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company reviews its unfunded commitments to determine if they are unconditionally cancellable by the Company. If the unfunded commitment is determined to not be unconditionally cancellable by the Company, a reserve for unfunded commitments is </span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">established. An estimate of the reserve for unfunded commitments considers both the likelihood that the funding will occur and an estimate of expected credit losses over the life of the commitment.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Management believes it uses relevant information available to make determinations about the allowance and that it has established the existing allowance in accordance with GAAP. However, the determination of the allowance requires significant judgment, and estimates of expected lifetime losses in the loan portfolio can vary significantly from the amounts actually observed. While management uses available information to recognize expected losses, future additions to the allowance may be necessary based on changes in the loans comprising the portfolio, changes in the current and forecasted economic conditions, changes to the interest rate environment which may directly impact prepayment and curtailment rate assumptions, and changes in the financial condition of borrowers.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Loans Acquired with Deteriorated Credit Quality (in accordance with ASC 310-30)</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Acquired loans with evidence of credit deterioration since their origination, commonly referred to as purchased credit impaired ("PCI") loans, are recorded at their initial fair values as of the date of the acquisition. The accounting standard for PCI loans was applicable for periods ending December 31, 2019 and earlier and was replaced with the accounting standard for purchase credit deteriorated loans as discussed below. Credit deterioration is determined based on the probability of collection of all contractually required principal and interest payments. The historical allowance for loan losses related to the acquired loans is not carried over to the Company’s financial statements. The determination of credit quality deterioration as of the purchase date may include parameters such as past due and non-accrual status, commercial risk ratings, cash flow projections, type of loan and collateral, collateral value and recent loan-to-value ratios or appraised values. For loans acquired with evidence of credit deterioration, the Company determines at the acquisition date the excess of the loan’s contractually required payments over all cash flows expected to be collected as an amount that should not be accreted into interest income (non-accretable difference). The remaining amount, representing the difference in the expected cash flows of acquired loans and the initial investment in the acquired loans, is accreted into interest income over the remaining life of the loan or pool of loans (accretable yield). Subsequent to the purchase date, increases in expected cash flows over those expected at the purchase date are recognized prospectively as interest income over the remaining life of the loan as an adjustment to the accretable yield. The present value of any decreases in expected cash flows after the purchase date is recognized as an impairment through addition to the valuation allowance.</span></div>
CY2020	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Derivative Financial Instruments</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Derivative Loan Commitments</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Mortgage loan commitments are derivative loan commitments if the loan that will result from exercise of the commitment will be held for sale upon funding. Derivative loan commitments are recognized at fair value in the Consolidated Statements of Condition in other assets or other liabilities with changes in their fair values recorded as a component of mortgage banking activities in the Consolidated Statements of Income.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Mortgage loan commitments are issued to borrowers. Subsequent to commitment date, changes in the fair value of the loan commitment are recognized based on changes in the fair value of the underlying mortgage loan due to interest rate changes, changes in the probability the derivative loan commitment will be exercised, and the passage of time. In estimating fair value, a probability is assigned to a loan commitment based on an expectation that it will be exercised and the loan will be funded.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Forward Loan Sale Commitments</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Loan sales agreements are evaluated to determine whether they meet the definition of a derivative as facts and circumstances may differ significantly. If agreements qualify, to protect against the price risk inherent in derivative loan commitments, the Company utilizes both “mandatory delivery” and “best efforts” forward loan sale commitments to mitigate the risk of potential decreases in the values of loans that would result from the exercise of the derivative loan commitments. Mandatory delivery contracts are accounted for as derivative instruments. Generally, best efforts contracts also meet the definition of derivative instruments after the loan to the borrower has closed. Accordingly, forward loan sale commitments that economically hedge the closed loan inventory are recognized at fair value in the Consolidated Statements of Condition in other assets or other liabilities with changes in their fair values recorded as a component of mortgage banking activities in the Consolidated Statements of Income. The Company estimates the fair value of its forward loan sales commitments using a methodology similar to that used for derivative loan commitments.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Interest Rate Swap Agreements</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company enters into interest rate swaps (“swaps”) with commercial loan customers to provide a facility to mitigate the fluctuations in the variable rate on the respective loans. These swaps are matched in exact offsetting terms to swaps that the Company enters into with an outside third party. The swaps are reported at fair value in other assets or other liabilities in the Consolidated Statements of Condition. The Company's swaps qualify as derivatives, but are not designated as hedging instruments, thus any net gain or loss resulting from changes in the fair value is recognized in other non-interest income in the Consolidated Statements of Income. Further discussion of the Company's financial derivatives is set forth in Note 19.</span></div>
CY2020Q1	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2800000	USD
CY2020Q1	us-gaap	Accounts Receivable Net AccountsReceivableNet	2200000	USD
CY2020Q2	sasr	Estimated Amount Of Goodwill To Be Recognized Within Twelve Months EstimatedAmountOfGoodwillToBeRecognizedWithinTwelveMonths	800000	USD
CY2020Q4	sasr	Estimated Amount Of Goodwill To Be Recognized Within Twelve Months EstimatedAmountOfGoodwillToBeRecognizedWithinTwelveMonths	500000	USD
CY2020	us-gaap	Stock Issued During Period Shares Acquisitions StockIssuedDuringPeriodSharesAcquisitions	12768949	shares
CY2020Q4	us-gaap	Business Acquisition Share Price BusinessAcquisitionSharePrice	22.64
CY2020	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	289089000	USD
CY2020	sasr	Business Combination Consideration Transferred Revere Options Converted To Sandy Spring Options BusinessCombinationConsiderationTransferredRevereOptionsConvertedToSandySpringOptions	3611000	USD
CY2020	sasr	Payment For Stok Options Business Acquisition PaymentForStokOptionsBusinessAcquisition	291000	USD
CY2020	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	11000	USD
CY2020	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	293002000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents	80744000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Marketable Securities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities	180752000	USD
CY2020Q4	sasr	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loans BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoans	2502244000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	3443000	USD
CY2020Q4	sasr	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Accrued Interest Receivable BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedInterestReceivable	7651000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill	18360000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets	53162000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	2846356000	USD
CY2020Q4	sasr	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposits BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits	2322422000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Long Term Debt BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt	205514000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther	25933000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	2553869000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	292487000	USD
CY2020Q4	sasr	Estimated Amount Of Goodwill To Be Recognized Within Twelve Months EstimatedAmountOfGoodwillToBeRecognizedWithinTwelveMonths	515000	USD
CY2020Q4	us-gaap	Compensating Balance Amount CompensatingBalanceAmount	236300000	USD
CY2019Q4	us-gaap	Compensating Balance Amount CompensatingBalanceAmount	105300000	USD
CY2020Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	34	security
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	92868000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	367000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	76879000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	693000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	169747000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1060000	USD
CY2019Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	50	security
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	248365000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2756000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	94778000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	849000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	343143000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	3605000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1348021000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1310159000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1072765000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1067386000	USD
CY2020Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Mortgage Related Securities Available For Sale Or Held For Investment PledgedFinancialInstrumentsNotSeparatelyReportedMortgageRelatedSecuritiesAvailableForSaleOrHeldForInvestment	465700000	USD
CY2019Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Mortgage Related Securities Available For Sale Or Held For Investment PledgedFinancialInstrumentsNotSeparatelyReportedMortgageRelatedSecuritiesAvailableForSaleOrHeldForInvestment	424800000	USD
CY2020Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	38650000	USD
CY2019Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	22559000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	26433000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	29244000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	677000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	0	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	65760000	USD
CY2019Q4	us-gaap	Marketable Securities MarketableSecurities	51803000	USD
CY2020	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	1297000	USD
CY2019	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	14000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	2519000	USD
CY2020	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	1068000	USD
CY2019	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	2000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	2343000	USD
CY2020	sasr	Net Gains Or Losses From Calls Of Investments Available For Sale NetGainsOrLossesFromCallsOfInvestmentsAvailableForSale	238000	USD
CY2019	sasr	Net Gains Or Losses From Calls Of Investments Available For Sale NetGainsOrLossesFromCallsOfInvestmentsAvailableForSale	65000	USD
CY2018	sasr	Net Gains Or Losses From Calls Of Investments Available For Sale NetGainsOrLossesFromCallsOfInvestmentsAvailableForSale	14000	USD
CY2020	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	467000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	77000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	190000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	24500000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1800000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	10400509000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	6705232000	USD
CY2020Q2	sasr	Business Combination Gross Amortized Cost Basis Loan Acquired BusinessCombinationGrossAmortizedCostBasisLoanAcquired	2500000000	USD
CY2020Q2	us-gaap	Financing Receivable Purchased With Credit Deterioration Amount At Par Value FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue	974800000	USD
CY2020Q2	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	18600000	USD
CY2020Q2	us-gaap	Financing Receivable Purchased With Credit Deterioration Discount Premium FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium	4500000	USD
CY2020Q2	sasr	Financing Receivable Purchased With Credit Deterioration Amount At Fair Value FinancingReceivablePurchasedWithCreditDeteriorationAmountAtFairValue	960700000	USD
CY2020Q2	sasr	Financing Receivable Purchased With Credit Deterioration Amount At Par Value Nonaccruing FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValueNonaccruing	11300000	USD
CY2020Q4	sasr	Financing Receivable Purchased With Credit Deterioration Amount At Fair Value FinancingReceivablePurchasedWithCreditDeteriorationAmountAtFairValue	911400000	USD
CY2020Q4	sasr	Financing Receivable Purchased With Credit Deterioration Remaining Unamortized Fair Value Premium FinancingReceivablePurchasedWithCreditDeteriorationRemainingUnamortizedFairValuePremium	4000000.0	USD
CY2020Q2	sasr	Financing Receivable Excluding Purchased With Credit Deterioration Amount At Purchase Price FinancingReceivableExcludingPurchasedWithCreditDeteriorationAmountAtPurchasePrice	1500000000	USD
CY2020Q2	sasr	Financing Receivable Unamortized Purchase Premium Discount FinancingReceivableUnamortizedPurchasePremiumDiscount	2100000	USD
CY2020Q4	sasr	Financing Receivable Excluding Purchased With Credit Deterioration Amount At Purchase Price FinancingReceivableExcludingPurchasedWithCreditDeteriorationAmountAtPurchasePrice	1300000000	USD
CY2020Q4	sasr	Financing Receivable Excluding Purchased With Credit Deterioration Remaining Unamortized Fair Value Premium FinancingReceivableExcludingPurchasedWithCreditDeteriorationRemainingUnamortizedFairValuePremium	1400000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	51367000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	54208000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	36712000	USD
CY2020	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	46846000	USD
CY2019	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	4737000	USD
CY2018	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	21871000	USD
CY2020	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	2208000	USD
CY2019	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	7578000	USD
CY2018	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	4375000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	96005000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	51367000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	54208000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56132000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	53486000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	45257000	USD
CY2020	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	18628000	USD
CY2019	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	0	USD
CY2018	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	0	USD
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	85669000	USD
CY2019	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	4684000	USD
CY2018	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	9023000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1819000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2668000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1416000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1012000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	630000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	622000	USD
CY2020	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	807000	USD
CY2019	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	2038000	USD
CY2018	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	794000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	165367000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56132000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	53486000	USD
CY2020Q4	sasr	Loans Individually Evaluated For Credit Loss With An Allowance LoansIndividuallyEvaluatedForCreditLossWithAnAllowance	20717000	USD
CY2019Q4	sasr	Loans Individually Evaluated For Credit Loss With An Allowance LoansIndividuallyEvaluatedForCreditLossWithAnAllowance	15333000	USD
CY2020Q4	sasr	Loans Individually Evaluated For Credit Loss Without An Allowance LoansIndividuallyEvaluatedForCreditLossWithoutAnAllowance	77001000	USD
CY2019Q4	sasr	Loans Individually Evaluated For Credit Loss Without An Allowance LoansIndividuallyEvaluatedForCreditLossWithoutAnAllowance	9440000	USD
CY2020Q4	sasr	Financing Receivable Individually Evaluated For Credit Loss FinancingReceivableIndividuallyEvaluatedForCreditLoss	97718000	USD
CY2019Q4	sasr	Financing Receivable Individually Evaluated For Credit Loss FinancingReceivableIndividuallyEvaluatedForCreditLoss	24773000	USD
CY2020Q4	sasr	Allowance Related To Loans Evaluated Individually AllowanceRelatedToLoansEvaluatedIndividually	11405000	USD
CY2019Q4	sasr	Allowance Related To Loans Evaluated Individually AllowanceRelatedToLoansEvaluatedIndividually	5501000	USD
CY2020Q4	sasr	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Credit Loss FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForCreditLoss	153962000	USD
CY2019Q4	sasr	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Credit Loss FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForCreditLoss	50631000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	165367000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56132000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56132000	USD
CY2020	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	18628000	USD
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	85669000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1819000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1012000	USD
CY2020	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	807000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	165367000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	10400509000	USD
CY2020Q4	sasr	Allowance For Loans And Leases To Total Loans And Leases Ratio AllowanceForLoansAndLeasesToTotalLoansAndLeasesRatio	0.0159
CY2020Q4	sasr	Financing Receivable Individually Evaluated For Credit Loss FinancingReceivableIndividuallyEvaluatedForCreditLoss	97718000	USD
CY2020Q4	sasr	Allowance Related To Loans Evaluated Individually AllowanceRelatedToLoansEvaluatedIndividually	11405000	USD
CY2020Q4	sasr	Individual Allowance To Loans Evaluated Individually Ratio IndividualAllowanceToLoansEvaluatedIndividuallyRatio	0.1167
CY2020Q4	sasr	Financing Receivable Allowance Collectively Evaluated For Credit Loss FinancingReceivableAllowanceCollectivelyEvaluatedForCreditLoss	10302791000	USD
CY2020Q4	sasr	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Credit Loss FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForCreditLoss	153962000	USD
CY2020Q4	sasr	Percentage Allowance On Losses PercentageAllowanceOnLosses	0.0149
CY2020Q4	sasr	Loans Individually Evaluated For Credit Loss With An Allowance LoansIndividuallyEvaluatedForCreditLossWithAnAllowance	20717000	USD
CY2020Q4	sasr	Allowance Related To Loans Evaluated Individually AllowanceRelatedToLoansEvaluatedIndividually	11405000	USD
CY2020Q4	sasr	Loans Individually Evaluated For Credit Loss Without An Allowance LoansIndividuallyEvaluatedForCreditLossWithoutAnAllowance	77001000	USD
CY2020Q4	sasr	Financing Receivable Individually Evaluated For Credit Loss FinancingReceivableIndividuallyEvaluatedForCreditLoss	97718000	USD
CY2020Q4	sasr	Unpaid Contractual Principal Balance UnpaidContractualPrincipalBalance	115816000	USD
CY2020	sasr	Average Financing Receivable Recorded Investment Nonaccrual Status AverageFinancingReceivableRecordedInvestmentNonaccrualStatus	72562000	USD
CY2020	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	18301000	USD
CY2020	sasr	Loans Transferred To Nonaccrual Status LoansTransferredToNonaccrualStatus	85300000	USD
CY2020	sasr	Reversal Of Uncollected Accrued Interest ReversalOfUncollectedAccruedInterest	2200000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	53486000	USD
CY2019	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	4684000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2668000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	630000	USD
CY2019	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	2038000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	56132000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	6705232000	USD
CY2019Q4	sasr	Allowance For Loans And Leases To Total Loans And Leases Ratio AllowanceForLoansAndLeasesToTotalLoansAndLeasesRatio	0.0084
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	24773000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	5501000	USD
CY2019Q4	sasr	Percentage Of Credit Loss Allowance To Loans PercentageOfCreditLossAllowanceToLoans	0.2221
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	6667375000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	50631000	USD
CY2019Q4	sasr	Percentage Allowance On Losses PercentageAllowanceOnLosses	0.0076
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	15333000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	5501000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	9440000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	24773000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	34620000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	23365000	USD
CY2019	sasr	Loans And Leases Receivable Impaired Contractual Interest Income LoansAndLeasesReceivableImpairedContractualInterestIncome	1947000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	465000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	169000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	10400509000	USD
CY2020Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	3305720000	USD
CY2020Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	1774275000	USD
CY2020Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	1179845000	USD
CY2020Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	1016641000	USD
CY2020Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	866898000	USD
CY2020Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	1242626000	USD
CY2020Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	1014504000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	10400509000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	38632000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2636000	USD
CY2019Q4	sasr	Financing Receivable Recorded Investment Nonperforming FinancingReceivableRecordedInvestmentNonperforming	41268000	USD
CY2019Q4	us-gaap	Foreclosed Assets ForeclosedAssets	1482000	USD
CY2019Q4	sasr	Nonperforming Assets NonperformingAssets	42750000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	27748000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	38632000	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	13084000	USD
CY2019Q4	sasr	Loans And Leases Receivable Current LoansAndLeasesReceivableCurrent	6625768000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	6705232000	USD
CY2020	sasr	Financing Receivable Troubled Debt Restructurings Balance Previous12 Months FinancingReceivableTroubledDebtRestructuringsBalancePrevious12Months	4533000	USD
CY2020	sasr	Financing Receivable Troubled Debt Restructurings Specific Allowance FinancingReceivableTroubledDebtRestructuringsSpecificAllowance	1020000	USD
CY2020	sasr	Financing Receivable Modification Subsequent Default Recorded Investment FinancingReceivableModificationSubsequentDefaultRecordedInvestment	0	USD
CY2019	sasr	Financing Receivable Troubled Debt Restructurings Balance Previous12 Months FinancingReceivableTroubledDebtRestructuringsBalancePrevious12Months	2359000	USD
CY2019	sasr	Financing Receivable Troubled Debt Restructurings Specific Allowance FinancingReceivableTroubledDebtRestructuringsSpecificAllowance	401000	USD
CY2019	sasr	Financing Receivable Modification Subsequent Default Recorded Investment FinancingReceivableModificationSubsequentDefaultRecordedInvestment	0	USD
CY2020Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0	USD
CY2020Q4	us-gaap	Land Land	13262000	USD
CY2019Q4	us-gaap	Land Land	10160000	USD
CY2020Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	70776000	USD
CY2019Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	70812000	USD
CY2020Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	49614000	USD
CY2019Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	46471000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	133652000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	127443000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	75932000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	68828000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	57720000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	58615000	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	8500000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	7200000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	7200000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	12453000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	11334000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	13571000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	8704000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	871000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	399000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	65215000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	69320000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	74982000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	76871000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y6M
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y4M24D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0304
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0328
CY2020	sasr	Number Of Operating Leases Acquired Likely To Be Terminated NumberOfOperatingLeasesAcquiredLikelyToBeTerminated	7	operating_lease
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	12490000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	10946000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	10851000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	9063000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	7347000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	37382000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	88079000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	13097000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	74982000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	42944000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	10423000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	32521000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	12156000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	4315000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	7841000	USD
CY2020Q4	us-gaap	Goodwill Gross GoodwillGross	370223000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	370223000	USD
CY2019Q4	us-gaap	Goodwill Gross GoodwillGross	347149000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	347149000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	347149000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2019Q4	us-gaap	Goodwill Goodwill	347149000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	370223000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	6600000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	5844000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	5089000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	4333000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	3567000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	7088000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	32521000	USD
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	3325547000	USD
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1892052000	USD
CY2020Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	1292164000	USD
CY2019Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	836433000	USD
CY2020Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	3339645000	USD
CY2019Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	1839593000	USD
CY2020Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	418051000	USD
CY2019Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	329919000	USD
CY2020Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	509919000	USD
CY2019Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	463431000	USD
CY2020Q4	sasr	Time Deposits Greater Than100000 And Less Than250000 TimeDepositsGreaterThan100000AndLessThan250000	670717000	USD
CY2019Q4	sasr	Time Deposits Greater Than100000 And Less Than250000 TimeDepositsGreaterThan100000AndLessThan250000	682936000	USD
CY2020Q4	sasr	Time Deposits250000 Or More TimeDeposits250000OrMore	477026000	USD
CY2019Q4	sasr	Time Deposits250000 Or More TimeDeposits250000OrMore	395955000	USD
CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	6707522000	USD
CY2019Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	4548267000	USD
CY2020Q4	us-gaap	Deposits Deposits	10033069000	USD
CY2019Q4	us-gaap	Deposits Deposits	6440319000	USD
CY2020Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	13100000	USD
CY2019Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	1400000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	1208915000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	275872000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	84093000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	73859000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	14745000	USD
CY2020Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	178000	USD
CY2020Q4	us-gaap	Time Deposits TimeDeposits	1657662000	USD
CY2020Q4	sasr	Percentage Of Time Deposits Greater Than100000 And Less Than250000 Of Total Deposits PercentageOfTimeDepositsGreaterThan100000AndLessThan250000OfTotalDeposits	0.067
CY2020Q4	sasr	Percentage Of Time Deposits Of250000 Or More Of Total Deposits PercentageOfTimeDepositsOf250000OrMoreOfTotalDeposits	0.048
CY2020Q4	sasr	Contractual Maturities Time Deposits Greater Than100000 And Less Than250000 Three Months Or Less ContractualMaturitiesTimeDepositsGreaterThan100000AndLessThan250000ThreeMonthsOrLess	211006000	USD
CY2020Q4	sasr	Contractual Maturities Time Deposits Greater Than100000 And Less Than250000 Three Months Through Six Months ContractualMaturitiesTimeDepositsGreaterThan100000AndLessThan250000ThreeMonthsThroughSixMonths	127934000	USD
CY2020Q4	sasr	Contractual Maturities Time Deposits Greater Than100000 And Less Than250000 Six Months Through12 Months ContractualMaturitiesTimeDepositsGreaterThan100000AndLessThan250000SixMonthsThrough12Months	139133000	USD
CY2020Q4	sasr	Contractual Maturities Time Deposits Greater Than100000 And Less Than250000 After12 Months ContractualMaturitiesTimeDepositsGreaterThan100000AndLessThan250000After12Months	192644000	USD
CY2020Q4	sasr	Time Deposits Greater Than100000 And Less Than250000 TimeDepositsGreaterThan100000AndLessThan250000	670717000	USD
CY2020Q4	sasr	Contractual Maturities Time Deposits250000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits250000OrMoreThreeMonthsOrLess	111332000	USD
CY2020Q4	sasr	Contractual Maturities Time Deposits250000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits250000OrMoreThreeMonthsThroughSixMonths	115678000	USD
CY2020Q4	sasr	Contractual Maturities Time Deposits250000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits250000OrMoreSixMonthsThrough12Months	140231000	USD
CY2020Q4	sasr	Contractual Maturities Time Deposits250000 Or More After12 Months ContractualMaturitiesTimeDeposits250000OrMoreAfter12Months	109785000	USD
CY2020Q4	sasr	Time Deposits250000 Or More TimeDeposits250000OrMore	477026000	USD
CY2020	sasr	Interest Expense Time Deposits Greater Than100000 And Less Than250000 InterestExpenseTimeDepositsGreaterThan100000AndLessThan250000	8100000	USD
CY2019	sasr	Interest Expense Time Deposits Greater Than100000 And Less Than250000 InterestExpenseTimeDepositsGreaterThan100000AndLessThan250000	10800000	USD
CY2018	sasr	Interest Expense Time Deposits Greater Than100000 And Less Than250000 InterestExpenseTimeDepositsGreaterThan100000AndLessThan250000	9500000	USD
CY2020	sasr	Interest Expense Time Deposits250000 Or More InterestExpenseTimeDeposits250000OrMore	10700000	USD
CY2019	sasr	Interest Expense Time Deposits250000 Or More InterestExpenseTimeDeposits250000OrMore	13000000.0	USD
CY2018	sasr	Interest Expense Time Deposits250000 Or More InterestExpenseTimeDeposits250000OrMore	3000000.0	USD
CY2020Q4	us-gaap	Subordinated Debt SubordinatedDebt	227088000	USD
CY2019Q4	us-gaap	Subordinated Debt SubordinatedDebt	209406000	USD
CY2020Q4	sasr	Pledged Financial Instruments Percentage Of Principal And Accrued Interest Collateralized PledgedFinancialInstrumentsPercentageOfPrincipalAndAccruedInterestCollateralized	1.025
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	230243000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0239
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	134167000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0213
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	76332000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0237
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	230445000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0239
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	72500000	USD
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	0	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0312
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	76665000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0237
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	72500000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0312
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	0	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	0	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	0	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	0	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0
CY2020Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	379075000	USD
CY2020Q4	sasr	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRate	0.0252
CY2019Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	513777000	USD
CY2019Q4	sasr	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRate	0.0242
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CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0264
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CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate	0
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CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0261
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P0Y
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P0Y
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y7M9D
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CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0
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CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	65279	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	31.34
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	485000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2020	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	395298	shares
CY2020	sasr	Share Based Compensation Arrangements By Share Based Payment Award Options Converted In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsConvertedInPeriodWeightedAverageExercisePrice	12.27
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	26063	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.10
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	398000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	765	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	39.02
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	3711	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	30.46
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	430038	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.97
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	6828000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	425274	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	14.71
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	6828000	USD
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	290000	USD
CY2019	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	371000	USD
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1470000	USD
CY2019	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1695000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	45497000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	40152000	USD
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1437000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1609000	USD
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Period Increase Decrease DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease	6672000	USD
CY2019	us-gaap	Defined Benefit Plan Benefit Obligation Period Increase Decrease DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease	5060000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	52426000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	45497000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	43457000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	37772000	USD
CY2020	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	6370000	USD
CY2019	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	1695000	USD
CY2019	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	7195000	USD
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	185000	USD
CY2020	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	1470000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	48357000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	43457000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	4069000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	2040000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	52426000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	45497000	USD
CY2020	sasr	Defined Benefit Plan Unrecognized Net Actuarial Loss DefinedBenefitPlanUnrecognizedNetActuarialLoss	12719000	USD
CY2019	sasr	Defined Benefit Plan Unrecognized Net Actuarial Loss DefinedBenefitPlanUnrecognizedNetActuarialLoss	11177000	USD
CY2020	sasr	Defined Benefit Plan Net Periodic Pension Cost Not Yet Recognized DefinedBenefitPlanNetPeriodicPensionCostNotYetRecognized	12719000	USD
CY2019	sasr	Defined Benefit Plan Net Periodic Pension Cost Not Yet Recognized DefinedBenefitPlanNetPeriodicPensionCostNotYetRecognized	11177000	USD
CY2018	sasr	Defined Benefit Plan Recognized Net Actuarial Loss DefinedBenefitPlanRecognizedNetActuarialLoss	1000000	USD
CY2020	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	490000	USD
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	1021000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0250
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0325
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0415
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1437000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1609000	USD
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1540000	USD
CY2020	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1821000	USD
CY2019	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1647000	USD
CY2018	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1861000	USD
CY2020	sasr	Defined Benefit Plan Recognized Net Actuarial Loss DefinedBenefitPlanRecognizedNetActuarialLoss	874000	USD
CY2019	sasr	Defined Benefit Plan Recognized Net Actuarial Loss DefinedBenefitPlanRecognizedNetActuarialLoss	1059000	USD
CY2018	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	679000	USD
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0325
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0415
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0365
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0475
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0500
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0500
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0475
CY2017Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	12487000	USD
CY2018	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	3914000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-1000000	USD
CY2018	sasr	Defined Benefit Plan Accumulated Other Comprehensive Income Increase Related To Change In Discount Rate Assumption DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeIncreaseRelatedToChangeInDiscountRateAssumption	-3049000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	12352000	USD
CY2019	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	-5176000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-1059000	USD
CY2019	sasr	Defined Benefit Plan Accumulated Other Comprehensive Income Increase Related To Change In Discount Rate Assumption DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeIncreaseRelatedToChangeInDiscountRateAssumption	5060000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	11177000	USD
CY2020	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	-4256000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-874000	USD
CY2020	sasr	Defined Benefit Plan Accumulated Other Comprehensive Income Increase Related To Change In Discount Rate Assumption DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeIncreaseRelatedToChangeInDiscountRateAssumption	6672000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	12719000	USD
CY2020Q4	sasr	Defined Benefit Plan Accumulated Other Comprehensive Income Loss Applicable Tax Effect DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossApplicableTaxEffect	3249000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	9470000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Amortization Next Fiscal Year DefinedBenefitPlanExpectedAmortizationNextFiscalYear	931000	USD
CY2020	sasr	Defined Benefit Plan Unrecognized Net Actuarial Loss DefinedBenefitPlanUnrecognizedNetActuarialLoss	12719000	USD
CY2019	sasr	Defined Benefit Plan Unrecognized Net Actuarial Loss DefinedBenefitPlanUnrecognizedNetActuarialLoss	11177000	USD
CY2018	sasr	Defined Benefit Plan Unrecognized Net Actuarial Loss DefinedBenefitPlanUnrecognizedNetActuarialLoss	12352000	USD
CY2020	sasr	Defined Benefit Plan Net Periodic Pension Cost Not Yet Recognized DefinedBenefitPlanNetPeriodicPensionCostNotYetRecognized	12719000	USD
CY2019	sasr	Defined Benefit Plan Net Periodic Pension Cost Not Yet Recognized DefinedBenefitPlanNetPeriodicPensionCostNotYetRecognized	11177000	USD
CY2018	sasr	Defined Benefit Plan Net Periodic Pension Cost Not Yet Recognized DefinedBenefitPlanNetPeriodicPensionCostNotYetRecognized	12352000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1.000
CY2019Q4	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1.000
CY2020	sasr	Maximum Percentage Of Asset Allocated To Control Market Volatility MaximumPercentageOfAssetAllocatedToControlMarketVolatility	0.70
CY2020	sasr	Maximum Percentage Of Market Value For Initial Acquisition Of Equity Portion MaximumPercentageOfMarketValueForInitialAcquisitionOfEquityPortion	0.05
CY2020	sasr	Minimum Percentage Of Value Of Equity Portion For Sale MinimumPercentageOfValueOfEquityPortionForSale	0.10
CY2020	sasr	Maximum Percentage Of Corporate Debt Issuable To Single Issuer MaximumPercentageOfCorporateDebtIssuableToSingleIssuer	0.10
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	48357000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	2190000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	43457000	USD
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	3340000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	2590000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	3260000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	2410000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	15270000	USD
CY2020	sasr	Profit Sharing And Matching Contribution ProfitSharingAndMatchingContribution	5300000	USD
CY2019	sasr	Profit Sharing And Matching Contribution ProfitSharingAndMatchingContribution	4100000	USD
CY2018	sasr	Profit Sharing And Matching Contribution ProfitSharingAndMatchingContribution	2800000	USD
CY2020	sasr	Executive Incentive Retirement Plan Benefit Cost ExecutiveIncentiveRetirementPlanBenefitCost	600000	USD
CY2019	sasr	Executive Incentive Retirement Plan Benefit Cost ExecutiveIncentiveRetirementPlanBenefitCost	500000	USD
CY2018	sasr	Executive Incentive Retirement Plan Benefit Cost ExecutiveIncentiveRetirementPlanBenefitCost	400000	USD
CY2020	sasr	Letter Of Credit Fees LetterOfCreditFees	710000	USD
CY2018	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	0	USD
CY2019	sasr	Noninterest Income Swap Fee NoninterestIncomeSwapFee	1932000	USD
CY2019	sasr	Letter Of Credit Fees LetterOfCreditFees	389000	USD
CY2018	sasr	Letter Of Credit Fees LetterOfCreditFees	611000	USD
CY2020	sasr	Extension Fees ExtensionFees	1967000	USD
CY2019	sasr	Extension Fees ExtensionFees	1287000	USD
CY2018	sasr	Extension Fees ExtensionFees	873000	USD
CY2020	sasr	Noninterest Income Swap Fee NoninterestIncomeSwapFee	1607000	USD
CY2018	sasr	Noninterest Income Swap Fee NoninterestIncomeSwapFee	0	USD
CY2020	sasr	Noninterest Income Prepayment Penalties NoninterestIncomePrepaymentPenalties	961000	USD
CY2019	sasr	Noninterest Income Prepayment Penalties NoninterestIncomePrepaymentPenalties	404000	USD
CY2018	sasr	Noninterest Income Prepayment Penalties NoninterestIncomePrepaymentPenalties	594000	USD
CY2020	us-gaap	Other Income OtherIncome	3976000	USD
CY2019	us-gaap	Other Income OtherIncome	4768000	USD
CY2018	us-gaap	Other Income OtherIncome	5048000	USD
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9221000	USD
CY2019	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8780000	USD
CY2018	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	7126000	USD
CY2020	us-gaap	Postage Expense PostageExpense	1624000	USD
CY2019	us-gaap	Postage Expense PostageExpense	1502000	USD
CY2018	us-gaap	Postage Expense PostageExpense	1439000	USD
CY2020	us-gaap	Communication Communication	2729000	USD
CY2019	us-gaap	Communication Communication	2414000	USD
CY2018	us-gaap	Communication Communication	2610000	USD
CY2020	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	5928000	USD
CY2019	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	0	USD
CY2018	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	0	USD
CY2020	sasr	Noninterest Expense Mortgage Processing NoninterestExpenseMortgageProcessing	1381000	USD
CY2019	sasr	Noninterest Expense Mortgage Processing NoninterestExpenseMortgageProcessing	817000	USD
CY2018	sasr	Noninterest Expense Mortgage Processing NoninterestExpenseMortgageProcessing	53000	USD
CY2020	sasr	Noninterest Expense Online Services NoninterestExpenseOnlineServices	1591000	USD
CY2019	sasr	Noninterest Expense Online Services NoninterestExpenseOnlineServices	1375000	USD
CY2018	sasr	Noninterest Expense Online Services NoninterestExpenseOnlineServices	1263000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	1576000	USD
CY2019	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	0	USD
CY2020	sasr	Noninterest Expense Franchise Tax NoninterestExpenseFranchiseTax	1574000	USD
CY2019	sasr	Noninterest Expense Franchise Tax NoninterestExpenseFranchiseTax	1307000	USD
CY2018	sasr	Noninterest Expense Franchise Tax NoninterestExpenseFranchiseTax	2143000	USD
CY2020	us-gaap	General Insurance Expense GeneralInsuranceExpense	1311000	USD
CY2019	us-gaap	General Insurance Expense GeneralInsuranceExpense	1113000	USD
CY2018	us-gaap	General Insurance Expense GeneralInsuranceExpense	1043000	USD
CY2020	sasr	Noninterest Expense Credit Card Fee NoninterestExpenseCreditCardFee	1083000	USD
CY2019	sasr	Noninterest Expense Credit Card Fee NoninterestExpenseCreditCardFee	1031000	USD
CY2018	sasr	Noninterest Expense Credit Card Fee NoninterestExpenseCreditCardFee	961000	USD
CY2020	us-gaap	Supplies Expense SuppliesExpense	912000	USD
CY2019	us-gaap	Supplies Expense SuppliesExpense	957000	USD
CY2018	us-gaap	Supplies Expense SuppliesExpense	951000	USD
CY2020	us-gaap	Other Expenses OtherExpenses	10894000	USD
CY2019	us-gaap	Other Expenses OtherExpenses	9910000	USD
CY2018	us-gaap	Other Expenses OtherExpenses	9029000	USD
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	30603000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	20426000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	19492000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	43115000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	28404000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	18615000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	13785000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6598000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7183000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	56900000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	35002000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	25798000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-22793000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	234000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4808000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-6636000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1192000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1218000	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-29429000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	1426000	USD
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	6026000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27471000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36428000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31824000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	42231000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	14287000	USD
CY2020Q4	sasr	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	19192000	USD
CY2019Q4	sasr	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	19616000	USD
CY2020Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets	0	USD
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets	1322000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	6108000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	4535000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	3249000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	2845000	USD
CY2020Q4	sasr	Deferred Tax Assets Deferred Loan Fees And Costs DeferredTaxAssetsDeferredLoanFeesAndCosts	4486000	USD
CY2019Q4	sasr	Deferred Tax Assets Deferred Loan Fees And Costs DeferredTaxAssetsDeferredLoanFeesAndCosts	471000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1856000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	659000	USD
CY2020Q4	sasr	Deferred Tax Assets Losses On Other Real Estate Owned DeferredTaxAssetsLossesOnOtherRealEstateOwned	203000	USD
CY2019Q4	sasr	Deferred Tax Assets Losses On Other Real Estate Owned DeferredTaxAssetsLossesOnOtherRealEstateOwned	201000	USD
CY2020Q4	sasr	Deferred Tax Assets Other Than Temporary Impairment DeferredTaxAssetsOtherThanTemporaryImpairment	75000	USD
CY2019Q4	sasr	Deferred Tax Assets Other Than Temporary Impairment DeferredTaxAssetsOtherThanTemporaryImpairment	76000	USD
CY2020Q4	sasr	Deferred Tax Assets Loan And Deposit Premium Or Discount DeferredTaxAssetsLoanAndDepositPremiumOrDiscount	1081000	USD
CY2019Q4	sasr	Deferred Tax Assets Loan And Deposit Premium Or Discount DeferredTaxAssetsLoanAndDepositPremiumOrDiscount	1422000	USD
CY2020Q4	sasr	Deferredtaxassetsreserveforrecourseloans Deferredtaxassetsreserveforrecourseloans	546000	USD
CY2019Q4	sasr	Deferredtaxassetsreserveforrecourseloans Deferredtaxassetsreserveforrecourseloans	166000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	1475000	USD
CY2019Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	916000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	181000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	159000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	80683000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	46675000	USD
CY2020Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	1479000	USD
CY2019Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	880000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	79204000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	45795000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	16693000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	17688000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	9684000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	1379000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	2211000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	2373000	USD
CY2020Q4	sasr	Deferredtaxliabilitiesdepreciation Deferredtaxliabilitiesdepreciation	2950000	USD
CY2019Q4	sasr	Deferredtaxliabilitiesdepreciation Deferredtaxliabilitiesdepreciation	2744000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	6894000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	3338000	USD
CY2020Q4	sasr	Deferredtaxliabilitiesbondaccretion Deferredtaxliabilitiesbondaccretion	195000	USD
CY2019Q4	sasr	Deferredtaxliabilitiesbondaccretion Deferredtaxliabilitiesbondaccretion	322000	USD
CY2020Q4	sasr	Deferred Tax Liabilities Section Four Eighty One Adjustments DeferredTaxLiabilitiesSectionFourEightyOneAdjustments	669000	USD
CY2019Q4	sasr	Deferred Tax Liabilities Section Four Eighty One Adjustments DeferredTaxLiabilitiesSectionFourEightyOneAdjustments	1335000	USD
CY2020Q4	sasr	Deferred Tax Liabilities Fair Value Acquisition Adjustments DeferredTaxLiabilitiesFairValueAcquisitionAdjustments	555000	USD
CY2019Q4	sasr	Deferred Tax Liabilities Fair Value Acquisition Adjustments DeferredTaxLiabilitiesFairValueAcquisitionAdjustments	0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	567000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	585000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	40418000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	29764000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	38786000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	16031000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	26130000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	32101000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	27865000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2472000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.020
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2101000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.014
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2427000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.018
CY2020	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurance	567000	USD
CY2020	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurancePercent	0.005
CY2019	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurance	665000	USD
CY2019	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurancePercent	0.004
CY2018	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurance	909000	USD
CY2018	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurancePercent	0.007
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5648000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.045
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6154000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.040
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6637000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.050
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-1764000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.014
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	496000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.005
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	939000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.006
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	658000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.005
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27471000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.221
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36428000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.238
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31824000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.240
CY2020	us-gaap	Net Income Loss NetIncomeLoss	96953000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	116433000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	100864000	USD
CY2020	sasr	Distributed And Undistributed Earnings Allocated To Participating Securities DistributedAndUndistributedEarningsAllocatedToParticipatingSecurities	783000	USD
CY2019	sasr	Distributed And Undistributed Earnings Allocated To Participating Securities DistributedAndUndistributedEarningsAllocatedToParticipatingSecurities	762000	USD
CY2018	sasr	Distributed And Undistributed Earnings Allocated To Participating Securities DistributedAndUndistributedEarningsAllocatedToParticipatingSecurities	579000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	96170000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	115671000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	100285000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	44312000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35797000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35707000	shares
CY2020	us-gaap	Weighted Average Number Basic Shares Outstanding Adjustment Pro Forma WeightedAverageNumberBasicSharesOutstandingAdjustmentProForma	-365000	shares
CY2019	us-gaap	Weighted Average Number Basic Shares Outstanding Adjustment Pro Forma WeightedAverageNumberBasicSharesOutstandingAdjustmentProForma	-235000	shares
CY2018	us-gaap	Weighted Average Number Basic Shares Outstanding Adjustment Pro Forma WeightedAverageNumberBasicSharesOutstandingAdjustmentProForma	-205000	shares
CY2020	us-gaap	Weighted Average Basic Shares Outstanding Pro Forma WeightedAverageBasicSharesOutstandingProForma	43947000	shares
CY2019	us-gaap	Weighted Average Basic Shares Outstanding Pro Forma WeightedAverageBasicSharesOutstandingProForma	35562000	shares
CY2018	us-gaap	Weighted Average Basic Shares Outstanding Pro Forma WeightedAverageBasicSharesOutstandingProForma	35502000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	185000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	56000	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	21000	shares
CY2020	us-gaap	Pro Forma Weighted Average Shares Outstanding Diluted ProFormaWeightedAverageSharesOutstandingDiluted	44132000	shares
CY2019	us-gaap	Pro Forma Weighted Average Shares Outstanding Diluted ProFormaWeightedAverageSharesOutstandingDiluted	35618000	shares
CY2018	us-gaap	Pro Forma Weighted Average Shares Outstanding Diluted ProFormaWeightedAverageSharesOutstandingDiluted	35523000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.19
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.25
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.82
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.18
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.25
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.82
CY2020	sasr	Potentially Incremental Common Shares Antidilutive PotentiallyIncrementalCommonSharesAntidilutive	17000	shares
CY2019	sasr	Potentially Incremental Common Shares Antidilutive PotentiallyIncrementalCommonSharesAntidilutive	9000	shares
CY2018	sasr	Potentially Incremental Common Shares Antidilutive PotentiallyIncrementalCommonSharesAntidilutive	7000	shares
CY2020	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	467000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	77000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	190000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	467000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	77000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	190000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	120000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	20000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	50000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	347000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	57000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	140000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-874000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-1059000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-1000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-874000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-1059000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-739000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-1000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-223000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-277000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-261000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-651000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-782000	USD
CY2020Q4	sasr	Concentration Risk Credit Risk Financial Instrument Commitments To Extend Credit ConcentrationRiskCreditRiskFinancialInstrumentCommitmentsToExtendCredit	3320157000	USD
CY2019Q4	sasr	Concentration Risk Credit Risk Financial Instrument Commitments To Extend Credit ConcentrationRiskCreditRiskFinancialInstrumentCommitmentsToExtendCredit	2196977000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	1600000	USD
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	423560000	USD
CY2020Q4	sasr	Financing Receivable Individually Evaluated For Credit Loss FinancingReceivableIndividuallyEvaluatedForCreditLoss	97700000	USD
CY2020Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	86300000	USD
CY2020Q4	sasr	Allowance Related To Loans Evaluated Individually AllowanceRelatedToLoansEvaluatedIndividually	11400000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	24800000	USD
CY2019Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	19300000	USD
CY2019Q4	sasr	Allowance Related To Loans Evaluated Individually AllowanceRelatedToLoansEvaluatedIndividually	5500000	USD
CY2020	us-gaap	Interest Expense InterestExpense	60401000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	85669000	USD
CY2020	us-gaap	Noninterest Income NoninterestIncome	102716000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	255782000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	124424000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27471000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	96953000	USD
CY2020Q4	us-gaap	Assets Assets	12798429000	USD
CY2019	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	347869000	USD
CY2019	us-gaap	Interest Expense InterestExpense	82561000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	4684000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	71322000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	179085000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	152861000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36428000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	116433000	USD
CY2019Q4	us-gaap	Assets Assets	8629002000	USD
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	324082000	USD
CY2018	us-gaap	Interest Expense InterestExpense	63637000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	9023000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	61049000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	179783000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	132688000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31824000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	100864000	USD
CY2018Q4	us-gaap	Assets Assets	8243272000	USD
CY2020Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	83858000	USD
CY2020Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	114927000	USD
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	112984000	USD
CY2020Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	111791000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	19524000	USD
CY2020Q2	us-gaap	Interest Expense InterestExpense	13413000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	15500000	USD
CY2020Q4	us-gaap	Interest Expense InterestExpense	11964000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	64334000	USD
CY2020Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	101514000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	97484000	USD
CY2020Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	99827000	USD
CY2020Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	24469000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	18168000	USD
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	22924000	USD
CY2020Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	58686000	USD
CY2020Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	7003000	USD
CY2020Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-4489000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	29390000	USD
CY2020Q4	us-gaap	Noninterest Income NoninterestIncome	32234000	USD
CY2020Q1	us-gaap	Noninterest Expense NoninterestExpense	47746000	USD
CY2020Q2	us-gaap	Noninterest Expense NoninterestExpense	85438000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	60937000	USD
CY2020Q4	us-gaap	Noninterest Expense NoninterestExpense	61661000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	10287000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-19686000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	58934000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	74889000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	300000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5348000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14292000	USD
CY2020Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18227000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	9987000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-14338000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	44642000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	56662000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.94
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.19
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.94
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.19
CY2019Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	88183000	USD
CY2019Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	87214000	USD
CY2019Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	87082000	USD
CY2019Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	85390000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	21433000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	21029000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	20292000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	19807000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	66750000	USD
CY2019Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	66185000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	66790000	USD
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	65583000	USD
CY2019Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-128000	USD
CY2019Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1633000	USD
CY2019Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1524000	USD
CY2019Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1655000	USD
CY2019Q1	us-gaap	Noninterest Income NoninterestIncome	16969000	USD
CY2019Q2	us-gaap	Noninterest Income NoninterestIncome	16556000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	18573000	USD
CY2019Q4	us-gaap	Noninterest Income NoninterestIncome	19224000	USD
CY2019Q1	us-gaap	Noninterest Expense NoninterestExpense	44192000	USD
CY2019Q2	us-gaap	Noninterest Expense NoninterestExpense	43887000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	44925000	USD
CY2019Q4	us-gaap	Noninterest Expense NoninterestExpense	46081000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	39655000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	37221000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	38914000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	37071000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9338000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8945000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9531000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8614000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	30317000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	28276000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	29383000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	28457000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.80
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.79
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80

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$SASR
Sandy Spring Bancorp Inc Stock $sasr

2020 Q4 Form 10-K Financial Statement

#000082441021000017 Filed on February 19, 2021

Income Statement

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$SASR Sandy Spring Bancorp Inc Stock $sasr

2020 Q4 Form 10-K Financial Statement

#000082441021000017 Filed on February 19, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SASR
Sandy Spring Bancorp Inc Stock $sasr