$SASR
SANDY SPRING BANCORP INC Stock $sasr

$sasr Overview Financials Valuation SEC Filings Company Website

2019 Q1 Form 10-K Financial Statement

#000082441019000002 Filed on February 22, 2019

Income Statement

Concept	2019 Q1	2017 Q4	2017 Q3
Revenue	$88.18M	$50.68M	$49.59M
YoY Change	16.79%	14.54%	15.71%
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	$3.300M	$2.100M	$1.900M
YoY Change	10.0%	0.0%	-5.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$21.43M	$7.184M	$6.892M
YoY Change	69.93%	36.16%	34.45%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$39.66M	$20.20M	$23.32M
YoY Change	39.77%	0.02%	15.39%
Income Tax	$9.338M	$11.93M	$8.229M
% Of Pretax Income	23.55%	59.07%	35.29%
Net Earnings	$30.32M	$8.267M	$15.09M
YoY Change	39.94%	-37.92%	11.99%
Net Earnings / Revenue	34.38%	16.31%	30.43%
Basic Earnings Per Share	$0.85	$0.34	$0.62
Diluted Earnings Per Share	$0.85	$0.34	$0.62
COMMON SHARES
Basic Shares Outstanding	35.54M shares	23.97M shares	23.99M shares
Diluted Shares Outstanding	35.81M shares		24.22M shares

Balance Sheet

Concept	2019 Q1	2017 Q4	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$194.4M	$158.0M	$142.0M
YoY Change	-31.19%	-12.32%	5.97%
Cash & Equivalents	$133.6M	$112.5M	$102.2M
Short-Term Investments	$60.77M	$45.52M	$39.85M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$61.00M	$54.76M	$54.11M
YoY Change	1.07%	2.24%	1.41%
Goodwill	$347.1M	$85.77M	$85.77M
YoY Change	1.24%	0.0%	0.0%
Intangibles	$9.297M	$580.0K	$604.0K
YoY Change	-18.5%	-14.71%	-15.64%
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	$8.328B	$5.447B	$5.335B
YoY Change	5.48%	6.98%	10.9%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$121.0M	$34.00M	$35.00M
YoY Change	120.0%	-2.86%	6.06%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$123.0M	$119.0M	$147.0M
YoY Change	-17.45%	-4.8%	18.55%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$121.0M	$34.00M	$35.00M
YoY Change	120.0%	-2.86%	6.06%
LONG-TERM LIABILITIES
Long-Term Debt	$37.00M	$0.00	$0.00
YoY Change	-2.63%	-100.0%	-100.0%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$37.00M	$0.00	$0.00
YoY Change	-2.63%	-100.0%	-100.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$121.0M	$34.00M	$35.00M
Total Long-Term Liabilities	$37.00M	$0.00	$0.00
Total Liabilities	$7.232B	$4.883B	$4.770B
YoY Change	5.11%	7.13%	11.61%
SHAREHOLDERS EQUITY
Retained Earnings	$461.9M	$378.5M	$376.5M
YoY Change	17.71%	8.01%	9.65%
Common Stock	$643.0M	$192.2M	$191.4M
YoY Change	0.5%	1.27%	1.39%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.096B	$563.8M	$564.5M
YoY Change
Total Liabilities & Shareholders Equity	$8.328B	$5.447B	$5.335B
YoY Change	5.48%	6.98%	10.9%

Cashflow Statement

Concept	2019 Q1	2017 Q4	2017 Q3
OPERATING ACTIVITIES
Net Income	$30.32M	$8.267M	$15.09M
YoY Change	39.94%	-37.92%	11.99%
Depreciation, Depletion And Amortization	$3.300M	$2.100M	$1.900M
YoY Change	10.0%	0.0%	-5.0%
Cash From Operating Activities	$27.32M	$12.30M	$16.80M
YoY Change	-38.27%	-64.35%	37.7%
INVESTING ACTIVITIES
Capital Expenditures	$1.066M	-$2.800M	-$2.200M
YoY Change	-62.49%	86.67%	29.41%
Acquisitions	$0.00
YoY Change	-100.0%
Other Investing Activities	$33.20M	-$106.6M	-$35.80M
YoY Change	-548.65%	-60.82%	-48.34%
Cash From Investing Activities	$32.11M	-$109.5M	-$37.90M
YoY Change	-413.98%	-59.98%	-46.62%
FINANCING ACTIVITIES
Cash Dividend Paid	$10.01M
YoY Change	8.0%
Common Stock Issuance & Retirement, Net	-$343.0K
YoY Change	-24.78%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$27.26M	107.5M	46.40M
YoY Change	-137.4%	-60.91%	-26.81%
NET CHANGE
Cash From Operating Activities	$27.32M	12.30M	16.80M
Cash From Investing Activities	$32.11M	-109.5M	-37.90M
Cash From Financing Activities	-$27.26M	107.5M	46.40M
Net Change In Cash	$32.17M	10.30M	25.30M
YoY Change	-69.91%	-71.31%	450.0%
FREE CASH FLOW
Cash From Operating Activities	$27.32M	$12.30M	$16.80M
Capital Expenditures	$1.066M	-$2.800M	-$2.200M
Free Cash Flow	$26.25M	$15.10M	$19.00M
YoY Change	-36.61%	-58.06%	36.69%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	sasr	Transfer From Loans To Residential Mortgage Loans Held For Sale TransferFromLoansToResidentialMortgageLoansHeldForSale	60043000	USD
CY2017	sasr	Transfer From Loans To Residential Mortgage Loans Held For Sale TransferFromLoansToResidentialMortgageLoansHeldForSale	39744000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	168768000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	112500000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	71354000	USD
CY2017	us-gaap	Noninterest Expense NoninterestExpense	129099000	USD
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	23996293	shares
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	168188000	USD
CY2016	us-gaap	Equipment Expense EquipmentExpense	6883000	USD
CY2016	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	7583000	USD
CY2018Q4	us-gaap	Foreclosed Assets ForeclosedAssets	1584000	USD
CY2017	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	165791000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	563816000	USD
CY2018	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	1304000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	45518000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	101000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	53486000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.82
CY2017Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	55693000	USD
CY2018	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	6158000	USD
CY2016	us-gaap	Noninterest Income NoninterestIncome	51042000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.1
CY2017	us-gaap	Pro Forma Weighted Average Shares Outstanding Diluted ProFormaWeightedAverageSharesOutstandingDiluted	24175000	shares
CY2016	us-gaap	Pro Forma Weighted Average Shares Outstanding Diluted ProFormaWeightedAverageSharesOutstandingDiluted	24120000	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	21000	shares
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	32000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	35728000	shares
CY2018Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	4164561000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	848611000	USD
CY2016	us-gaap	Interest Expense Deposits InterestExpenseDeposits	8161000	USD
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	35530734	shares
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	87935000	USD
CY2017Q4	us-gaap	Interest Receivable InterestReceivable	15480000	USD
CY2017	us-gaap	Interest Expense InterestExpense	26031000	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2977000	USD
CY2016	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	5000	USD
CY2016	us-gaap	Occupancy Net OccupancyNet	12960000	USD
CY2018Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	33858000	USD
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	9788000	USD
CY2016	us-gaap	Interest Expense InterestExpense	21004000	USD
CY2016	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	5546000	USD
CY2018	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	7855000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-7420000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	23996000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	34726000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	18352000	USD
CY2017	us-gaap	Other Noninterest Expense OtherNoninterestExpense	19636000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-15754000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4268991000	USD
CY2017	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1273000	USD
CY2018	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	293131000	USD
CY2018	us-gaap	Interest And Fee Income Loans And Leases Held For Sale InterestAndFeeIncomeLoansAndLeasesHeldForSale	1245000	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
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.82
CY2017	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3305000	USD
CY2017Q4	us-gaap	Assets Assets	5446675000	USD
CY2017Q4	us-gaap	Subordinated Debt SubordinatedDebt	0	USD
CY2016	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	170556000	USD
CY2016	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	6759000	USD
CY2017Q4	us-gaap	Deposits Deposits	3963662000	USD
CY2016	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	290000	USD
CY2017Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
CY2016	us-gaap	Other Noninterest Expense OtherNoninterestExpense	20762000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	61942000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-6857000	USD
CY2016	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2741000	USD
CY2017	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	172091000	USD
CY2018Q4	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	327429000	USD
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.2
CY2018Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1750319000	USD
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2018	us-gaap	Noninterest Income NoninterestIncome	61049000	USD
CY2018	us-gaap	Interest Expense Deposits InterestExpenseDeposits	39139000	USD
CY2016	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	11610000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	121469000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	7175369000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	441553000	USD
CY2018Q4	us-gaap	Federal Funds Sold FederalFundsSold	609000	USD
CY2018	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	31000	USD
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	149552000	USD
CY2018	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	20516000	USD
CY2016	us-gaap	Marketing Expense MarketingExpense	2851000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	937335000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	8243272000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	130000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	6571634000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	45257000	USD
CY2016	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	5377000	USD
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.2
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	324082000	USD
CY2016	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	943000	USD
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	4327000	USD
CY2017	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2403000	USD
CY2017	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	6331000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	96998000	USD
CY2017Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	2699270000	USD
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	23996293	shares
CY2018	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	7126000	USD
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.04
CY2017Q4	us-gaap	Liabilities Liabilities	4882859000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	378489000	USD
CY2017	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	13881000	USD
CY2017	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	27000	USD
CY2017Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	53962000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	71990000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	347149000	USD
CY2018	us-gaap	Equipment Expense EquipmentExpense	9335000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	729507000	USD
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	6603000	USD
CY2017	us-gaap	Interest And Fee Income Loans And Leases Held For Sale InterestAndFeeIncomeLoansAndLeasesHeldForSale	279000	USD
CY2016	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	1932000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4314248000	USD
CY2018	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	5095000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2
CY2018Q4	sasr	Accrued Interest Payable And Other Liabilities AccruedInterestPayableAndOtherLiabilities	47024000	USD
CY2018	us-gaap	Interest Expense InterestExpense	63637000	USD
CY2018Q4	us-gaap	Assets Assets	8243272000	USD
CY2018	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	21408000	USD
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5317000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	606573000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	580000	USD
CY2016	us-gaap	Noninterest Expense NoninterestExpense	123058000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	260445000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23740000	USD
CY2017	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	8111000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1067903000	USD
CY2017Q4	us-gaap	Foreclosed Assets ForeclosedAssets	2253000	USD
CY2018	us-gaap	Marketing Expense MarketingExpense	3924000	USD
CY2017	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	410000	USD
CY2016	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	144006000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	73389000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2162000	USD
CY2017	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	6231000	USD
CY2017	us-gaap	Noninterest Income NoninterestIncome	51243000	USD
CY2017Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1264392000	USD
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2018	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	1921000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	48250000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	765833000	USD
CY2018	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	1169000	USD
CY2017	us-gaap	Occupancy Net OccupancyNet	13053000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	132688000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	145074000	USD
CY2018Q4	us-gaap	Interest Receivable InterestReceivable	24609000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	9023000	USD
CY2017Q4	us-gaap	Federal Funds Sold FederalFundsSold	2845000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-467000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-258000	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
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-714000	USD
CY2017	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	68000	USD
CY2017	us-gaap	Marketing Expense MarketingExpense	3119000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	25548000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	190000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5446675000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	6518148000	USD
CY2018Q4	us-gaap	Subordinated Debt SubordinatedDebt	37425000	USD
CY2017	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	194799000	USD
CY2017	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	12000	USD
CY2016	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	5408000	USD
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.98
CY2018Q4	us-gaap	Deposits Deposits	5914880000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	101481000	USD
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35530734	shares
CY2016	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	11500000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	73132000	USD
CY2017	us-gaap	Equipment Expense EquipmentExpense	7015000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	85768000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	35531000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31824000	USD
CY2018Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	54761000	USD
CY2018	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	251422000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	179783000	USD
CY2016	us-gaap	Interest And Fee Income Loans And Leases Held For Sale InterestAndFeeIncomeLoansAndLeasesHeldForSale	387000	USD
CY2017	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	5486000	USD
CY2016	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	150868000	USD
CY2017Q4	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	119359000	USD
CY2018Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	67014000	USD
CY2017Q4	sasr	Accrued Interest Payable And Other Liabilities AccruedInterestPayableAndOtherLiabilities	34005000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	100864000	USD
CY2017	us-gaap	Interest Expense Deposits InterestExpenseDeposits	13256000	USD
CY2017	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	12426000	USD
CY2016	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2462000	USD
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-1181000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-651000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	7976000	USD
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	7958000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	2645000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	2139000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6089000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	349000	USD
CY2017	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	142877000	USD
CY2016	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	196726000	USD
CY2017	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	149367000	USD
CY2016	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	239705000	USD
CY2017	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3403000	USD
CY2016	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3877000	USD
CY2016	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-48000	USD
CY2017	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	891000	USD
CY2016	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1146000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	9829000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	5134000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-1007000	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-2932000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-5174000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	1873000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	125028000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	287211000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	5004000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	106114000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	123762000	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	298803000	USD
CY2018	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	641521000	USD
CY2017	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	427773000	USD
CY2016	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	469942000	USD
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1151000	USD
CY2017	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1275000	USD
CY2016	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1393000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-32487000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1347000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	10401000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7441000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5798000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	340376000	USD
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	386118000	USD
CY2016	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	313814000	USD
CY2018	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	201184000	USD
CY2017	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-5760000	USD
CY2016	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	15974000	USD
CY2018	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	5477000000	USD
CY2017	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	3965000000	USD
CY2016	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	2665000000	USD
CY2018	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	5633579000	USD
CY2017	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	3989167000	USD
CY2016	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	2560000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1395000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1200000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1580000	USD
CY2018	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	0	USD
CY2017	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	0	USD
CY2016	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	13273000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	39277000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	25134000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	23676000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-11019000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-21625000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	61243000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	12889000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	936767000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	25664000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	31738000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	22331000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.1
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.04
CY2016	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.98
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	20888	shares
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	30567	shares
CY2016	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	44067	shares
CY2018	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	28996	shares
CY2017	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	17578	shares
CY2016	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	23779	shares
CY2018	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	37705	shares
CY2017	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	47064	shares
CY2016	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	49468	shares
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	729295000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	228484000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	306771000	USD
CY2018Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	22456000	USD
CY2018Q4	us-gaap	Marketable Securities MarketableSecurities	73389000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	728153000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	63747000	USD
CY2017Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	8398000	USD
CY2017Q4	us-gaap	Marketable Securities MarketableSecurities	45518000	USD
CY2018	sasr	Net Gains Or Losses From Calls Of Investments Available For Sale NetGainsOrLossesFromCallsOfInvestmentsAvailableForSale	14000	USD
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Use of Estimates</font></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets </font><font style='font-family:Times New Roman;font-size:10pt;' >and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, and affect the reported amounts of revenues earned and expenses incurred during the reporting period. Actual results could differ from those est</font><font style='font-family:Times New Roman;font-size:10pt;' >imates. Estimates that could change significantly relate to the provision for loan losses and the related allowance, determination of impaired loans and the related measurement of impairment, potential impairment of goodwill or other intangible assets, val</font><font style='font-family:Times New Roman;font-size:10pt;' >uation of investment securities and the determination of whether impaired securities are other-than-temporarily impaired, valuation of other real estate owned, valuation of share-based compensation, the assessment that a liability should be recognized with</font><font style='font-family:Times New Roman;font-size:10pt;' > 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.</font></p><p style='text-align:justify;line-height:12pt;' ></p></div>
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	63482000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	277297000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	212825000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	392136000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	945740000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	12789000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	180109000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	276830000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	184264000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	210386000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	227688000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	385804000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	304454000	USD
CY2018	sasr	Net Gains Or Losses From Calls Of Investments Held To Maturity NetGainsOrLossesFromCallsOfInvestmentsHeldToMaturity	0	USD
CY2017	sasr	Net Gains Or Losses From Calls Of Investments Available For Sale NetGainsOrLossesFromCallsOfInvestmentsAvailableForSale	32000	USD
CY2017	sasr	Net Gains Or Losses From Calls Of Investments Held To Maturity NetGainsOrLossesFromCallsOfInvestmentsHeldToMaturity	0	USD
CY2016	sasr	Net Gains Or Losses From Calls Of Investments Available For Sale NetGainsOrLossesFromCallsOfInvestmentsAvailableForSale	440000	USD
CY2016	sasr	Net Gains Or Losses From Calls Of Investments Held To Maturity NetGainsOrLossesFromCallsOfInvestmentsHeldToMaturity	1000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	41988000	USD
CY2017	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	6140000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	36712000	USD
CY2018	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	21871000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	54208000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1416000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2566000	USD
CY2016	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	3134000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	622000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	779000	USD
CY2016	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	760000	USD
CY2018	sasr	Financing Receivable Allowance For Credit Losses Net Charge Offs FinancingReceivableAllowanceForCreditLossesNetChargeOffs	794000	USD
CY2017	sasr	Financing Receivable Allowance For Credit Losses Net Charge Offs FinancingReceivableAllowanceForCreditLossesNetChargeOffs	1787000	USD
CY2016	sasr	Financing Receivable Allowance For Credit Losses Net Charge Offs FinancingReceivableAllowanceForCreditLossesNetChargeOffs	2374000	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
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44067000	USD
CY2015Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	40895000	USD
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	22210000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	4924000	USD
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	6549424000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	48562000	USD
CY2018Q4	sasr	Allowance For Loans And Leases To Total Loans And Leases Ratio AllowanceForLoansAndLeasesToTotalLoansAndLeasesRatio	0.0081	pure
CY2018Q4	sasr	Percentage Of Credit Loss Allowance To Loans PercentageOfCreditLossAllowanceToLoans	0.2217	pure
CY2018	sasr	Percentage Allowance On Losses PercentageAllowanceOnLosses	0.0074	pure
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	4014000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	41243000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	12876000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	11693000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	13563000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	9334000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	9116000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	10529000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	22210000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	20809000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	24092000	USD
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	4825000	USD
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	39242000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	44067000	USD
CY2018	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	20211000	USD
CY2017	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	23179000	USD
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	26382000	USD
CY2018	sasr	Loans And Leases Receivable Impaired Contractual Interest Income LoansAndLeasesReceivableImpairedContractualInterestIncome	2513000	USD
CY2017	sasr	Loans And Leases Receivable Impaired Contractual Interest Income LoansAndLeasesReceivableImpairedContractualInterestIncome	2314000	USD
CY2016	sasr	Loans And Leases Receivable Impaired Contractual Interest Income LoansAndLeasesReceivableImpairedContractualInterestIncome	2082000	USD
CY2018	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	506000	USD
CY2017	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	754000	USD
CY2016	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	511000	USD
CY2018	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	138000	USD
CY2017	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	169000	USD
CY2016	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	186000	USD
CY2017Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	20809000	USD
CY2017Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4293439000	USD
CY2017Q4	sasr	Allowance For Loans And Leases To Total Loans And Leases Ratio AllowanceForLoansAndLeasesToTotalLoansAndLeasesRatio	0.0105	pure
CY2017Q4	sasr	Percentage Of Credit Loss Allowance To Loans PercentageOfCreditLossAllowanceToLoans	0.1929	pure
CY2017	sasr	Percentage Allowance On Losses PercentageAllowanceOnLosses	0.0096	pure
CY2018Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	4924000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	35121000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	4014000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	32689000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	26336000	USD
CY2017Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	2788000	USD
CY2017Q4	sasr	Financing Receivable Recorded Investment Nonperforming FinancingReceivableRecordedInvestmentNonperforming	29349000	USD
CY2017Q4	sasr	Nonperforming Assets NonperformingAssets	31602000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	33583000	USD
CY2018Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	1942000	USD
CY2018Q4	sasr	Financing Receivable Recorded Investment Nonperforming FinancingReceivableRecordedInvestmentNonperforming	36014000	USD
CY2018Q4	sasr	Nonperforming Assets NonperformingAssets	37598000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	7600000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	7900000	USD
CY2018Q4	us-gaap	Land Land	10160000	USD
CY2017Q4	us-gaap	Land Land	10160000	USD
CY2018Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	69620000	USD
CY2017Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	64278000	USD
CY2018Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	44802000	USD
CY2017Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	37452000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	124582000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	111890000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	62640000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	57129000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	11263000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	10890000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	9880000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	8345000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	7534000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1720000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	13828000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	61740000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1944000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1507000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1295000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	9788000	USD
CY2018Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	2700000	USD
CY2017Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	2000000	USD
CY2018	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	12500000	USD
CY2017	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	4500000	USD
CY2016	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	3200000	USD
CY2018Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	1098740000	USD
CY2018Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	1009041000	USD
CY2018Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	324474000	USD
CY2018Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	98007000	USD
CY2018Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	74525000	USD
CY2018Q4	us-gaap	Time Deposits TimeDeposits	1526161000	USD
CY2018Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	198272000	USD
CY2018Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	250574000	USD
CY2018Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	336909000	USD
CY2018Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More After12 Months ContractualMaturitiesTimeDeposits100000OrMoreAfter12Months	312985000	USD
CY2018Q4	sasr	Retail Repurchase Agreements Carrying Amount RetailRepurchaseAgreementsCarryingAmount	137429000	USD
CY2018Q4	sasr	Retail Repurchase Agreements Average Amount RetailRepurchaseAgreementsAverageAmount	142938000	USD
CY2018Q4	sasr	Retail Repurchase Agreements Maximum Month End Balance RetailRepurchaseAgreementsMaximumMonthEndBalance	154435000	USD
CY2017Q4	sasr	Retail Repurchase Agreements Carrying Amount RetailRepurchaseAgreementsCarryingAmount	119359000	USD
CY2017Q4	sasr	Retail Repurchase Agreements Average Amount RetailRepurchaseAgreementsAverageAmount	133356000	USD
CY2017Q4	sasr	Retail Repurchase Agreements Maximum Month End Balance RetailRepurchaseAgreementsMaximumMonthEndBalance	147459000	USD
CY2016Q4	sasr	Retail Repurchase Agreements Carrying Amount RetailRepurchaseAgreementsCarryingAmount	125119000	USD
CY2016Q4	sasr	Retail Repurchase Agreements Average Amount RetailRepurchaseAgreementsAverageAmount	120711000	USD
CY2016Q4	sasr	Retail Repurchase Agreements Maximum Month End Balance RetailRepurchaseAgreementsMaximumMonthEndBalance	139325000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	625969000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	575000000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	42500000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	80000000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	80816000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	100833000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	26826000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	10000000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	72500000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	0	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	0	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	0	USD
CY2018Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	848611000	USD
CY2017Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	765833000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	11.73
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	13.42
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	7.75
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	26.22
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	38.15
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	21.13
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	29.74
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	87300	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	16212	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	81508	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	369000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	383000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1160000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	51801	shares
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	347000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	25.48
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.05	pure
CY2017	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	4971000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	41246000	USD
CY2017	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1985000	USD
CY2017	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	836000	USD
CY2016	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	1207000	USD
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0365	pure
CY2018	sasr	Four Zero One K Provision Description FourZeroOneKProvisionDescription	The Sandy Spring Bank 401(k) Plan includes a 401(k) provision with a Company match. The 401(k) provision is voluntary and covers all eligible employees after ninety days of service. Employees contributing to the 401(k) provision receive a matching contribution of 100% of the first 3% of compensation and 50% of the next 2% of compensation subject to employee contribution limitations. The Company matching contribution vests immediately. The Plan permits employees to purchase shares of Sandy Spring Bancorp, Inc. common stock with their 401(k) contributions, Company match, and other contributions under the Plan.
CY2018	sasr	Profit Sharing And Matching Contribution ProfitSharingAndMatchingContribution	2800000	USD
CY2017	sasr	Profit Sharing And Matching Contribution ProfitSharingAndMatchingContribution	2000000	USD
CY2016	sasr	Profit Sharing And Matching Contribution ProfitSharingAndMatchingContribution	2000000	USD
CY2018	sasr	Executive Incentive Retirement Plan Benefit Cost ExecutiveIncentiveRetirementPlanBenefitCost	400000	USD
CY2017	sasr	Executive Incentive Retirement Plan Benefit Cost ExecutiveIncentiveRetirementPlanBenefitCost	400000	USD
CY2016	sasr	Executive Incentive Retirement Plan Benefit Cost ExecutiveIncentiveRetirementPlanBenefitCost	300000	USD
CY2016Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	40783000	USD
CY2017	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1640000	USD
CY2017	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-32000	USD
CY2017	us-gaap	Defined Benefit Plan Benefit Obligation Period Increase Decrease DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease	2995000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	43441000	USD
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1540000	USD
CY2018	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-593000	USD
CY2018	us-gaap	Defined Benefit Plan Benefit Obligation Period Increase Decrease DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease	-3048000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	40152000	USD
CY2016Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	36020000	USD
CY2018	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	-2646000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	37772000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	2380000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	2195000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	40152000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	43441000	USD
CY2018	sasr	Defined Benefit Plan Unrecognized Net Actuarial Loss DefinedBenefitPlanUnrecognizedNetActuarialLoss	12352000	USD
CY2017	sasr	Defined Benefit Plan Unrecognized Net Actuarial Loss DefinedBenefitPlanUnrecognizedNetActuarialLoss	12487000	USD
CY2018	sasr	Defined Benefit Plan Net Periodic Pension Cost Not Yet Recognized DefinedBenefitPlanNetPeriodicPensionCostNotYetRecognized	12352000	USD
CY2017	sasr	Defined Benefit Plan Net Periodic Pension Cost Not Yet Recognized DefinedBenefitPlanNetPeriodicPensionCostNotYetRecognized	12487000	USD
CY2016	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1657000	USD
CY2018	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1861000	USD
CY2017	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0415	pure
CY2016	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0426	pure
CY2017	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.06	pure
CY2016	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.05	pure
CY2015Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	13038000	USD
CY2016	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	1108000	USD
CY2016	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	-1164000	USD
CY2016	sasr	Defined Benefit Plan Accumulated Other Comprehensive Income Increase Related To Change In Discount Rate Assumption DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeIncreaseRelatedToChangeInDiscountRateAssumption	707000	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
CY2018Q4	sasr	Defined Benefit Plan Accumulated Other Comprehensive Income Loss Applicable Tax Effect DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossApplicableTaxEffect	3228000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	9124000	USD
CY2018	us-gaap	Other Expenses OtherExpenses	15281000	USD
CY2017	us-gaap	Other Expenses OtherExpenses	11171000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	18615000	USD
CY2016	sasr	Defined Benefit Plan Unrecognized Net Actuarial Loss DefinedBenefitPlanUnrecognizedNetActuarialLoss	-13689000	USD
CY2016	sasr	Defined Benefit Plan Net Periodic Pension Cost Not Yet Recognized DefinedBenefitPlanNetPeriodicPensionCostNotYetRecognized	-13689000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	2760000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	1760000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	2570000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	2360000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	2320000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Remainder Of Fiscal Year DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear	13730000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	22355000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	18699000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7183000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5146000	USD
CY2018	sasr	Letter Of Credit Fees LetterOfCreditFees	611000	USD
CY2017	sasr	Letter Of Credit Fees LetterOfCreditFees	847000	USD
CY2016	sasr	Letter Of Credit Fees LetterOfCreditFees	888000	USD
CY2016	us-gaap	Other Expenses OtherExpenses	9998000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	27865000	USD
CY2018	sasr	Extension Fees ExtensionFees	873000	USD
CY2017	sasr	Extension Fees ExtensionFees	568000	USD
CY2016	sasr	Extension Fees ExtensionFees	559000	USD
CY2018	us-gaap	Other Income OtherIncome	5642000	USD
CY2017	us-gaap	Other Income OtherIncome	4916000	USD
CY2016	us-gaap	Other Income OtherIncome	5312000	USD
CY2018	us-gaap	Professional Fees ProfessionalFees	6056000	USD
CY2017	us-gaap	Professional Fees ProfessionalFees	4492000	USD
CY2016	us-gaap	Professional Fees ProfessionalFees	4840000	USD
CY2018	sasr	Other Real Estate Owned OtherRealEstateOwned	162000	USD
CY2017	sasr	Other Real Estate Owned OtherRealEstateOwned	17000	USD
CY2016	sasr	Other Real Estate Owned OtherRealEstateOwned	19000	USD
CY2018	us-gaap	Postage Expense PostageExpense	1439000	USD
CY2017	us-gaap	Postage Expense PostageExpense	1179000	USD
CY2016	us-gaap	Postage Expense PostageExpense	1155000	USD
CY2018	us-gaap	Communication Communication	2610000	USD
CY2017	us-gaap	Communication Communication	1502000	USD
CY2016	us-gaap	Communication Communication	1583000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	30776000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	25194000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2427000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3929000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3606000	USD
CY2018	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurance	909000	USD
CY2017	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurance	841000	USD
CY2016	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurance	862000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3508000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2965000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-332000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	49000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4692000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	25798000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	27501000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	23391000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4808000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	6973000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	516000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1218000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	252000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-167000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	0	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	307000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	2607000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	2735000	USD
CY2018Q4	sasr	Deferredtaxliabilitiesdepreciation Deferredtaxliabilitiesdepreciation	3307000	USD
CY2017Q4	sasr	Deferredtaxliabilitiesdepreciation Deferredtaxliabilitiesdepreciation	2708000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	3701000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1264000	USD
CY2018Q4	sasr	Deferredtaxliabilitiesbondaccretion Deferredtaxliabilitiesbondaccretion	188000	USD
CY2017Q4	sasr	Deferredtaxliabilitiesbondaccretion Deferredtaxliabilitiesbondaccretion	146000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	769000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1162000	USD
CY2018Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	62891000	USD
CY2018Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1997000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	12260000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7364000	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
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	21563000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-1181000	USD
CY2018Q1	us-gaap	Noninterest Income NoninterestIncome	17118000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	11866000	USD
CY2018	us-gaap	Weighted Average Basic Shares Outstanding Pro Forma WeightedAverageBasicSharesOutstandingProForma	35707000	shares
CY2017	us-gaap	Weighted Average Basic Shares Outstanding Pro Forma WeightedAverageBasicSharesOutstandingProForma	24175000	shares
CY2016	us-gaap	Weighted Average Basic Shares Outstanding Pro Forma WeightedAverageBasicSharesOutstandingProForma	24120000	shares
CY2018	us-gaap	Pro Forma Weighted Average Shares Outstanding Diluted ProFormaWeightedAverageSharesOutstandingDiluted	35707000	shares
CY2016	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	29000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	24207000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	7000	shares
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1297000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-6614000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	190000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1273000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1932000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	50000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	504000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	770000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	140000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-651000	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
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-393000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6637000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	658000	USD
CY2018Q4	sasr	Concentration Risk Credit Risk Financial Instrument Commitments To Extend Credit ConcentrationRiskCreditRiskFinancialInstrumentCommitmentsToExtendCredit	2080562000	USD
CY2017Q4	sasr	Concentration Risk Credit Risk Financial Instrument Commitments To Extend Credit ConcentrationRiskCreditRiskFinancialInstrumentCommitmentsToExtendCredit	1647521000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	8364000	USD
CY2017Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	10727000	USD
CY2016Q4	us-gaap	Assets Assets	5091383000	USD
CY2018Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	75504000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	12613000	USD
CY2018Q1	us-gaap	Noninterest Expense NoninterestExpense	49641000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	28371000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6706000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	21665000	USD
CY2018Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	78597000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	14779000	USD
CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	63818000	USD
CY2018Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1733000	USD
CY2018Q2	us-gaap	Noninterest Income NoninterestIncome	14868000	USD
CY2018Q2	us-gaap	Noninterest Expense NoninterestExpense	45082000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	31871000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7472000	USD
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.72
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0	pure
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	24399000	USD
CY2018Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	84374000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	16783000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	67591000	USD
CY2018Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1890000	USD
CY2018Q3	us-gaap	Noninterest Income NoninterestIncome	15033000	USD
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	42393000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	38341000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9107000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	29234000	USD
CY2018Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	85607000	USD
CY2018Q4	us-gaap	Interest Expense InterestExpense	19462000	USD
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	66145000	USD
CY2018Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3403000	USD
CY2018Q4	us-gaap	Noninterest Income NoninterestIncome	14030000	USD
CY2018Q4	us-gaap	Noninterest Expense NoninterestExpense	42667000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	34105000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8539000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	25566000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.68
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.68
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	12800000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0246	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0143	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.0212	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate One To Two Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate	0.035	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0308	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0313	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.029	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Three To Four Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate	0.0349	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0.0312	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Four To Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate	0	pure
CY2017Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0	pure
CY2018Q4	sasr	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRate	0.0257	pure
CY2017Q4	sasr	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRate	0.0189	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.018	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.045	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.05	pure
CY2018	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurancePercent	0.007	pure
CY2017	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurancePercent	0.009	pure
CY2016	sasr	Effective Income Tax Rate Reconciliation Deduction Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationDeductionBankOwnedLifeInsurancePercent	0.011	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.05	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.04	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.041	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.005	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.004	pure
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0	pure
CY2018	dei	Trading Symbol TradingSymbol	SASR
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	35544551	shares
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	580621000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2613000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	346417000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1054000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.24	pure
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.395	pure
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.33	pure
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	6105000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	7159000	USD
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	9603000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	12216000	USD
CY2018Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Mortgage Related Securities Available For Sale Or Held For Investment PledgedFinancialInstrumentsNotSeparatelyReportedMortgageRelatedSecuritiesAvailableForSaleOrHeldForInvestment	477300000	USD
CY2017Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Mortgage Related Securities Available For Sale Or Held For Investment PledgedFinancialInstrumentsNotSeparatelyReportedMortgageRelatedSecuritiesAvailableForSaleOrHeldForInvestment	431700000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	27235000	USD
CY2018Q4	sasr	Loans And Leases Receivable Current LoansAndLeasesReceivableCurrent	6484869000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	13417000	USD
CY2017Q4	sasr	Loans And Leases Receivable Current LoansAndLeasesReceivableCurrent	4274495000	USD
CY2018Q4	sasr	Time Deposit Maturities After Year Four1 TimeDepositMaturitiesAfterYearFour1	20114000	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	SANDY SPRING BANCORP INC
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018Q2	dei	Entity Public Float EntityPublicFloat	1430000000	USD
CY2018Q4	sasr	Retail Repurchase Agreements Interest Rate RetailRepurchaseAgreementsInterestRate	0.0051	pure
CY2017Q4	sasr	Retail Repurchase Agreements Interest Rate RetailRepurchaseAgreementsInterestRate	0.0024	pure
CY2016Q4	sasr	Retail Repurchase Agreements Interest Rate RetailRepurchaseAgreementsInterestRate	0.0024	pure
CY2018Q4	sasr	Retail Repurchase Agreements Average Interest Rate RetailRepurchaseAgreementsAverageInterestRate	0.0034	pure
CY2017Q4	sasr	Retail Repurchase Agreements Average Interest Rate RetailRepurchaseAgreementsAverageInterestRate	0.0025	pure
CY2016Q4	sasr	Retail Repurchase Agreements Average Interest Rate RetailRepurchaseAgreementsAverageInterestRate	0.0024	pure
CY2017	us-gaap	Net Income Loss NetIncomeLoss	53209000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-243000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0415	pure
CY2017Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0365	pure
CY2016Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0415	pure
CY2018Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	22773000	USD
CY2017Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	9848000	USD
CY2018Q4	us-gaap	Compensating Balance Amount CompensatingBalanceAmount	70000000	USD
CY2017Q4	us-gaap	Compensating Balance Amount CompensatingBalanceAmount	37400000	USD
CY2017Q4	us-gaap	Loans Receivable Net LoansReceivableNet	4268991000	USD
CY2017Q4	us-gaap	Interest Receivable And Other Assets InterestReceivableAndOtherAssets	95730000	USD
CY2017Q4	us-gaap	Time Deposits TimeDeposits	688951000	USD
CY2018Q4	sasr	Other Held To Maturity Securities And Other Equity Securities OtherHeldToMaturitySecuritiesAndOtherEquitySecurities	73389000	USD
CY2018Q4	us-gaap	Loans Receivable Net LoansReceivableNet	6518148000	USD
CY2018Q4	us-gaap	Interest Receivable And Other Assets InterestReceivableAndOtherAssets	110823000	USD
CY2018	dei	Entity Listing Par Value Per Share EntityListingParValuePerShare	1
CY2018	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2017	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2018	us-gaap	Defined Benefit Plan Investment Policies And Strategies Narrative Description DefinedBenefitPlanInvestmentPoliciesAndStrategiesNarrativeDescription	Investment strategies and asset allocations are based on careful consideration of Plan liabilities, the Plan’s funded status and the Company’s financial condition. Investment performance and asset allocation are measured and monitored on an ongoing basis. Management allocates plan assets towards fixed income securities in order to align expected cash outflows with its funding source. This asset allocation has been set after taking into consideration the Plan’s current frozen status and the possibility of partial plan terminations over the intermediate term. The Plan’s asset allocation remained consistent during the current year. Market volatility risk is controlled by limiting the asset allocation of the most volatile asset class, equities, to no more than 70% of the portfolio and by ensuring that there is sufficient liquidity to meet distribution requirements from the portfolio without disrupting long-term assets. Diversification of the equity portion of the portfolio is controlled by limiting the value of any initial acquisition so that it does not exceed 5% of the market value of the portfolio when purchased. The policy requires the sale of any portion of an equity position when its value exceeds 10% of the portfolio. Fixed income market volatility risk is managed by limiting the term of fixed income investments to five years. Fixed income investments must carry an “A” or better rating by a recognized credit rating agency. Corporate debt of a single issuer may not exceed 10% of the market value of the portfolio. The investment in derivative instruments such as “naked” call options, futures, commodities, and short selling is prohibited. Investment in equity index funds and the writing of “covered” call options (a conservative strategy to increase portfolio income) are permitted. Foreign currency-denominated debt instruments are not permitted. At December 31, 2018, management is of the opinion that there are no significant concentrations of risk in the assets of the plan with respect to any single entity, industry, country, commodity or investment fund that are not otherwise mitigated by FDIC insurance available to the participants of the plan and collateral pledged for any such amount that may not be covered by FDIC insurance. Investment performance is measured against industry accepted benchmarks. The risk tolerance and asset allocation limitations imposed by the policy are consistent with attaining the rate of return assumptions used in the actuarial funding calculations. The RPIC committee meets quarterly to review the activities of the investment managers to ensure adherence with the Investment Policy Statement.
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	13273000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	2164000	USD
CY2017Q4	sasr	Other Held To Maturity Securities And Other Equity Securities OtherHeldToMaturitySecuritiesAndOtherEquitySecurities	45518000	USD
CY2017	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	11416000	USD
CY2016	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	417000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-9925000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-294000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-6246000	USD
CY2018	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<div><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Derivative Financial Instruments</font></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Derivative Loan Commitments</font></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >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 on the consolidated statements of condition</font><font style='font-family:Times New Roman;font-size:10pt;' > 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.</font></p><p style='text-align:justify;line-height:12pt;' ></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >Mortgage l</font><font style='font-family:Times New Roman;font-size:10pt;' >oan commitments are issued to borrowers. Subsequent to commitment date, cha</font><font style='font-family:Times New Roman;font-size:10pt;' >nges 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 ti</font><font style='font-family:Times New Roman;font-size:10pt;' >me. 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.</font></p><p style='text-align:justify;line-height:12pt;' ></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Forward Loan Sale Commitments</font></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >Loan sales agreements are evaluated to determine whether they meet t</font><font style='font-family:Times New Roman;font-size:10pt;' >he 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 l</font><font style='font-family:Times New Roman;font-size:10pt;' >oan 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 effort</font><font style='font-family:Times New Roman;font-size:10pt;' >s 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 on the consolidated stateme</font><font style='font-family:Times New Roman;font-size:10pt;' >nts 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 commitm</font><font style='font-family:Times New Roman;font-size:10pt;' >ents using a methodology similar to that used for derivative loan commitments.</font></p><p style='text-align:justify;line-height:12pt;' ></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Interest Rate Swap Agreements</font></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The Company enters into interest rate swaps (“swaps”) with loan customers to provide a facility to mitigate the fluctuations in the variable rate </font><font style='font-family:Times New Roman;font-size:10pt;' >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. The Company's swaps qualify as deriva</font><font style='font-family:Times New Roman;font-size:10pt;' >tives, 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. Further discussion of the Company's financial derivatives is set forth</font><font style='font-family:Times New Roman;font-size:10pt;' > in</font><font style='font-family:Times New Roman;font-size:10pt;' > Note </font><font style='font-family:Times New Roman;font-size:10pt;' >19</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >t</font><font style='font-family:Times New Roman;font-size:10pt;' >o the Consolidated Financial Statements. </font></p><p style='text-align:justify;line-height:12pt;' ></p></div>
CY2016	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	21355000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	524427000	USD
CY2016	us-gaap	Dividends Common Stock DividendsCommonStock	23676000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2264000	USD
CY2016	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	716000	USD
CY2017	sasr	Stock Issued During Period Shares Director Stock Purchase Plan StockIssuedDuringPeriodSharesDirectorStockPurchasePlan	258	shares
CY2016	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	512459	shares
CY2018	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	4375000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2600000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-108000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2484000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	489000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-7465000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-955000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-4924000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	90000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	490000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-258000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	45000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	225000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	12156000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2368000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	786000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	206000	USD
CY2017	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	-3016000	USD
CY2017	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	-1181000	USD
CY2017	sasr	Defined Benefit Plan Accumulated Other Comprehensive Income Increase Related To Change In Discount Rate Assumption DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeIncreaseRelatedToChangeInDiscountRateAssumption	2995000	USD
CY2016Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	13689000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	12487000	USD
CY2018	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1188000	USD
CY2017	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1945000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	21050000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	712000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-393000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	93444000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	52966000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	42933000	USD
CY2018	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2017	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2016	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	117354000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	2251000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	40863000	USD
CY2018	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
CY2017	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	30000000	USD
CY2016	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	5000000	USD
CY2018	sasr	Transfer Of Investments Held To Maturity To Available For Sale Securities TransferOfInvestmentsHeldToMaturityToAvailableForSaleSecurities	0	USD
CY2017	sasr	Transfer Of Investments Held To Maturity To Available For Sale Securities TransferOfInvestmentsHeldToMaturityToAvailableForSaleSecurities	0	USD
CY2016	sasr	Transfer Of Investments Held To Maturity To Available For Sale Securities TransferOfInvestmentsHeldToMaturityToAvailableForSaleSecurities	203118000	USD
CY2016	sasr	Transfer From Loans To Residential Mortgage Loans Held For Sale TransferFromLoansToResidentialMortgageLoansHeldForSale	36867000	USD
CY2018	sasr	Loans Transferred From Loans To Other Real Estate Owned LoansTransferredFromLoansToOtherRealEstateOwned	289000	USD
CY2017	sasr	Loans Transferred From Loans To Other Real Estate Owned LoansTransferredFromLoansToOtherRealEstateOwned	1588000	USD
CY2016	sasr	Loans Transferred From Loans To Other Real Estate Owned LoansTransferredFromLoansToOtherRealEstateOwned	637000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	3322000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	2519000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	0	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	1491000	USD
CY2018	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	0	USD
CY2017	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	1275000	USD
CY2016	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	3167000	USD
CY2018Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	223	Securities
CY2017Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	79	Securities
CY2018Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	703145000	USD
CY2017Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	658716000	USD
CY2018Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	1605024000	USD
CY2017Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	1030432000	USD
CY2018Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	330231000	USD
CY2017Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	321171000	USD
CY2018Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	427421000	USD
CY2017Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	293201000	USD
CY2017Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	395750000	USD
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	360000	USD
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	2200000	USD
CY2017Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	45958000	USD
CY2017Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	48576000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	49589000	USD
CY2017Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	50676000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	5705000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	6250000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	6892000	USD
CY2017Q4	us-gaap	Interest Expense InterestExpense	7184000	USD
CY2017Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	40253000	USD
CY2017Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	42326000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	42697000	USD
CY2017Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	43492000	USD
CY2017Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	194000	USD
CY2017Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1322000	USD
CY2017Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	934000	USD
CY2017Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	527000	USD
CY2017Q1	us-gaap	Noninterest Income NoninterestIncome	12632000	USD
CY2017Q2	us-gaap	Noninterest Income NoninterestIncome	13571000	USD
CY2017Q3	us-gaap	Noninterest Income NoninterestIncome	12746000	USD
CY2017Q4	us-gaap	Noninterest Income NoninterestIncome	12294000	USD
CY2017Q1	us-gaap	Noninterest Expense NoninterestExpense	29981000	USD
CY2017Q2	us-gaap	Noninterest Expense NoninterestExpense	32868000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	31191000	USD
CY2017Q4	us-gaap	Noninterest Expense NoninterestExpense	35059000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	22710000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21707000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	23318000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	20200000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7598000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6966000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8229000	USD
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11933000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	15112000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	14741000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	15089000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	8267000	USD
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
CY2018	sasr	Defined Benefit Plan Recognized Net Actuarial Loss DefinedBenefitPlanRecognizedNetActuarialLoss	1000000	USD
CY2017	sasr	Defined Benefit Plan Recognized Net Actuarial Loss DefinedBenefitPlanRecognizedNetActuarialLoss	1181000	USD
CY2016	sasr	Defined Benefit Plan Recognized Net Actuarial Loss DefinedBenefitPlanRecognizedNetActuarialLoss	1164000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	261381000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	533572000	USD
CY2016	sasr	Stock Issued During Period Value Director Stock Purchase Plan StockIssuedDuringPeriodValueDirectorStockPurchasePlan	7000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	591000	USD
CY2016	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-417000	USD
CY2016	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	13273000	USD
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	25134000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	593000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2164000	USD
CY2018	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2017	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2016	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2018	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	11766000	USD
CY2017	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	4252000	USD
CY2016	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2018	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	59945000	USD
CY2017	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	40031000	USD
CY2016	us-gaap	Proceeds From Sale Of Loans And Leases Held For Investment ProceedsFromSaleOfLoansAndLeasesHeldForInvestment	0	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-299000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-1809000	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-125000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	135000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	1202000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-651000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	85768000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2018Q4	sasr	Pledged Financial Instruments Percentage Of Principal And Accrued Interest Collateralized PledgedFinancialInstrumentsPercentageOfPrincipalAndAccruedInterestCollateralized	1.025	pure
CY2018	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	1188000	USD
CY2017	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	1945000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Expected Amortization Next Fiscal Year DefinedBenefitPlanExpectedAmortizationNextFiscalYear	1021000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1	pure
CY2017Q4	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1	pure
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	6026000	USD
CY2017	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	7225000	USD
CY2016	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	349000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	5544000	USD
CY2016	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	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.063	pure
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CY2016	sasr	Gross Realized Gains From Sales Of Equity Securities Available For Sale GrossRealizedGainsFromSalesOfEquitySecuritiesAvailableForSale	0	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	760000	USD
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CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	112500000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	134125000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	60504000	USD
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CY2017	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	607000	USD
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CY2018	us-gaap	Stock Issued During Period Shares Acquisitions StockIssuedDuringPeriodSharesAcquisitions	11446197	shares
CY2018Q1	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	446640000	USD
CY2018Q1	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	10000	USD
CY2018Q1	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	446650000	USD
CY2018Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents	32497000	USD
CY2018Q1	sasr	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Residential Mortgage Loans Held For Sale BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedResidentialMortgageLoansHeldForSale	25789000	USD
CY2018Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Marketable Securities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities	302321000	USD
CY2018Q1	sasr	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loans BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoans	1676191000	USD
CY2018Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	4602000	USD
CY2018Q1	sasr	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Real Estate Owned BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherRealEstateOwned	497000	USD
CY2018Q1	sasr	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Accrued Interest Receivable BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedInterestReceivable	6648000	USD
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CY2018Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets	37014000	USD
CY2018Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	2096929000	USD
CY2018Q1	sasr	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposits BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits	1610327000	USD
CY2018Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther	283808000	USD
CY2018Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Long Term Debt BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt	17525000	USD
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CY2018Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	185269000	USD
CY2018Q1	sasr	Estimated Amount Of Goodwill To Be Recognized Within Twelve Months EstimatedAmountOfGoodwillToBeRecognizedWithinTwelveMonths	261381000	USD
CY2018Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period Contractually Required Payments Receivable At Acquisition CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition	49412000	USD
CY2018Q1	us-gaap	Certain Loans Acquired In Transfer Nonaccretable Difference CertainLoansAcquiredInTransferNonaccretableDifference	17915000	USD
CY2018Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period Cash Flows Expected To Be Collected At Acquisition CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition	31497000	USD
CY2018Q1	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	3988000	USD
CY2018Q1	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue	27509000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	0	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions	3988000	USD
CY2017Q4	us-gaap	Business Acquisition Share Price BusinessAcquisitionSharePrice	39.02
CY2018Q1	us-gaap	Stock Issued During Period Shares Acquisitions StockIssuedDuringPeriodSharesAcquisitions	11446197	shares
CY2018	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	2343000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2018Q1	sasr	Business Combination Gross Amortized Cost Basis Loan Acquired BusinessCombinationGrossAmortizedCostBasisLoanAcquired	1697760000	USD
CY2018Q1	sasr	Interest Rate Fair Value Adjustment On Acquired Loan Portfolio InterestRateFairValueAdjustmentOnAcquiredLoanPortfolio	15370000	USD
CY2018Q1	sasr	Fair Value Adjustments On Pools Of Homogeneous Loans Acquired FairValueAdjustmentsOnPoolsOfHomogeneousLoansAcquired	22421000	USD
CY2018Q1	sasr	Fair Value Adjustment On Purchased Credit On Acquired Impaired Loans FairValueAdjustmentOnPurchasedCreditOnAcquiredImpairedLoans	14518000	USD
CY2018Q1	sasr	Business Combination Fair Value Of Loan Portfolio Acquired BusinessCombinationFairValueOfLoanPortfolioAcquired	1676191000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	1860000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	849000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	1279000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y7M9D
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y8M1D
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y8M15D
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	13979000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	12024000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets	2253000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	4339000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	1398000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	3228000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	3318000	USD
CY2018Q4	sasr	Deferred Tax Assets Deferred Loan Fees And Costs DeferredTaxAssetsDeferredLoanFeesAndCosts	306000	USD
CY2017Q4	sasr	Deferred Tax Assets Deferred Loan Fees And Costs DeferredTaxAssetsDeferredLoanFeesAndCosts	416000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	457000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	429000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	2343000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	0	USD
CY2018Q4	sasr	Deferred Tax Assets Losses On Other Real Estate Owned DeferredTaxAssetsLossesOnOtherRealEstateOwned	202000	USD
CY2017Q4	sasr	Deferred Tax Assets Losses On Other Real Estate Owned DeferredTaxAssetsLossesOnOtherRealEstateOwned	42000	USD
CY2018Q4	sasr	Deferred Tax Assets Other Than Temporary Impairment DeferredTaxAssetsOtherThanTemporaryImpairment	76000	USD
CY2017Q4	sasr	Deferred Tax Assets Other Than Temporary Impairment DeferredTaxAssetsOtherThanTemporaryImpairment	217000	USD
CY2018Q4	sasr	Deferred Tax Assets Loan And Deposi Tpremium Or Discount DeferredTaxAssetsLoanAndDeposiTpremiumOrDiscount	3950000	USD
CY2017Q4	sasr	Deferred Tax Assets Loan And Deposi Tpremium Or Discount DeferredTaxAssetsLoanAndDeposiTpremiumOrDiscount	91000	USD
CY2018Q4	sasr	Deferredtaxassetsreserveforrecourseloans Deferredtaxassetsreserveforrecourseloans	210000	USD
CY2017Q4	sasr	Deferredtaxassetsreserveforrecourseloans Deferredtaxassetsreserveforrecourseloans	133000	USD
CY2018Q4	sasr	Deferredtaxassetsdepreciation Deferredtaxassetsdepreciation	679000	USD
CY2017Q4	sasr	Deferredtaxassetsdepreciation Deferredtaxassetsdepreciation	0	USD
CY2018Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	0	USD
CY2017Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	299000	USD
CY2018Q4	sasr	Deferred Tax Assets Merger Expenses DeferredTaxAssetsMergerExpenses	251000	USD
CY2017Q4	sasr	Deferred Tax Assets Merger Expenses DeferredTaxAssetsMergerExpenses	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	280000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	7000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	33823000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	19230000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	1270000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	856000	USD
CY2018Q4	sasr	Deferred Tax Liabilities Section Four Eighty One Adjustments DeferredTaxLiabilitiesSectionFourEightyOneAdjustments	2053000	USD
CY2017Q4	sasr	Deferred Tax Liabilities Section Four Eighty One Adjustments DeferredTaxLiabilitiesSectionFourEightyOneAdjustments	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	404000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	204000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	900000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1800000	USD
CY2018Q1	sasr	Credit Impaired Loans Acquired In Transfer Nonaccretable Difference CreditImpairedLoansAcquiredInTransferNonaccretableDifference	10500000	USD
CY2018Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	41900000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	26000000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue	15300000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference	1300000	USD
CY2018	sasr	Proceeds From Credit Impaired Loans ProceedsFromCreditImpairedLoans	12400000	USD
CY2018Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	200000	USD
CY2018	sasr	Maximum Percentage Of Asset Allocated To Control Market Volatility MaximumPercentageOfAssetAllocatedToControlMarketVolatility	0.7	pure
CY2018	sasr	Maximum Percentage Of Market Value For Initial Acquisition Of Equity Portion MaximumPercentageOfMarketValueForInitialAcquisitionOfEquityPortion	0.05	pure
CY2018	sasr	Minimum Percentage Of Value Of Equity Portion For Sale MinimumPercentageOfValueOfEquityPortionForSale	0.1	pure
CY2018	sasr	Maximum Percentage Of Corporate Debt Issuable To Single Issuer MaximumPercentageOfCorporateDebtIssuableToSingleIssuer	0.1	pure
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-505004000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-392347000	USD
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CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	920	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	196	shares
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y8M12D
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y7M6D
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0000824410
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	36.19
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	42.48
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	446640000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	441000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	954000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-760000	USD
CY2018	sasr	Reclassfication Of Tax Effects From Other Comprehensive Income ReclassficationOfTaxEffectsFromOtherComprehensiveIncome	0	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	8784000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	4758000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	576000	USD
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
CY2018Q4	sasr	Percentageoftimedepositsof100000ormoreoftotaldeposits Percentageoftimedepositsof100000ormoreoftotaldeposits	0.19	pure
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false

Files In Submission

Name	View Source	Status
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$SASR
SANDY SPRING BANCORP INC Stock $sasr

2019 Q1 Form 10-K Financial Statement

#000082441019000002 Filed on February 22, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SASR SANDY SPRING BANCORP INC Stock $sasr

2019 Q1 Form 10-K Financial Statement

#000082441019000002 Filed on February 22, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SASR
SANDY SPRING BANCORP INC Stock $sasr