$SNV
SYNOVUS FINANCIAL CORP Stock $snv

$snv Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000001834921000014 Filed on March 01, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2018 Q4
Revenue		$231.1M	$357.4M
YoY Change		-35.34%	16.44%
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	$28.70M	-$900.0K	$13.50M
YoY Change	-3288.89%	-106.67%	-5.59%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$107.0M	$59.46M
YoY Change		79.92%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$187.1M	$206.6M	$143.9M
YoY Change	-9.45%	43.64%	38.37%
Income Tax	$36.70M	$54.95M	$38.78M
% Of Pretax Income	19.62%	26.59%	26.96%
Net Earnings	$150.4M	$151.7M	$105.1M
YoY Change	-0.85%	44.36%	254.91%
Net Earnings / Revenue		65.64%	29.4%
Basic Earnings Per Share		$0.98	$0.88
Diluted Earnings Per Share	$1.011M	$0.97	$0.87
COMMON SHARES
Basic Shares Outstanding	147.8M shares	146.5M shares	116.4M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q4	2019 Q4	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$4.253B	$1.187B	$1.144B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$464.0M	$869.0M	$434.3M
YoY Change	-46.61%	100.09%	1.76%
Goodwill	$452.4M	$497.3M	$57.32M
YoY Change	-9.02%	767.6%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets			$141.0M
YoY Change			-15.06%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$54.39B	$48.20B	$32.67B
YoY Change	12.84%	47.55%	4.64%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses		$384.0M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$235.6M	$1.919B	$887.7M
YoY Change	-87.72%	116.21%	239.86%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$236.0M	$384.0M	$238.0M
YoY Change	-38.54%	61.34%	47.83%
LONG-TERM LIABILITIES
Long-Term Debt	$1.202B	$2.158B	$1.657B
YoY Change	-44.3%	30.24%	-2.87%
Other Long-Term Liabilities	$1.103B	$394.0M	$270.0M
YoY Change	179.95%	45.93%	10.2%
Total Long-Term Liabilities	$2.305B	$2.552B	$1.927B
YoY Change	-9.68%	32.43%	-1.23%
TOTAL LIABILITIES
Total Short-Term Liabilities	$236.0M	$384.0M	$238.0M
Total Long-Term Liabilities	$2.305B	$2.552B	$1.927B
Total Liabilities	$49.23B	$43.26B	$29.54B
YoY Change	13.8%	46.47%	4.51%
SHAREHOLDERS EQUITY
Retained Earnings	$1.178B	$1.068B	$843.8M
YoY Change	10.27%	26.61%	55.05%
Common Stock	$168.1M	$166.8M	$143.3M
YoY Change	0.8%	16.4%	0.44%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$731.8M	$715.6M	$1.015B
YoY Change	2.27%	-29.48%	20.85%
Treasury Stock Shares	20.09M shares	19.64M shares	27.43M shares
Shareholders Equity	$5.161B	$4.942B	$3.134B
YoY Change
Total Liabilities & Shareholders Equity	$54.39B	$48.20B	$32.67B
YoY Change	12.84%	47.55%	4.64%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2018 Q4
OPERATING ACTIVITIES
Net Income	$150.4M	$151.7M	$105.1M
YoY Change	-0.85%	44.36%	254.91%
Depreciation, Depletion And Amortization	$28.70M	-$900.0K	$13.50M
YoY Change	-3288.89%	-106.67%	-5.59%
Cash From Operating Activities	$225.4M	$257.0M	$147.1M
YoY Change	-12.3%	74.71%	0.89%
INVESTING ACTIVITIES
Capital Expenditures	-$7.300M	-$21.00M	-$14.20M
YoY Change	-65.24%	47.89%	-13.41%
Acquisitions
YoY Change
Other Investing Activities	$877.9M	-$618.6M	-$432.0M
YoY Change	-241.92%	43.19%	-34.13%
Cash From Investing Activities	$870.5M	-$639.6M	-$446.1M
YoY Change	-236.1%	43.38%	-33.64%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	1.172B	387.1M	430.7M
YoY Change	202.66%	-10.12%	-254.04%
NET CHANGE
Cash From Operating Activities	225.4M	257.0M	147.1M
Cash From Investing Activities	870.5M	-639.6M	-446.1M
Cash From Financing Activities	1.172B	387.1M	430.7M
Net Change In Cash	2.267B	4.500M	131.7M
YoY Change	50288.89%	-96.58%	-116.34%
FREE CASH FLOW
Cash From Operating Activities	$225.4M	$257.0M	$147.1M
Capital Expenditures	-$7.300M	-$21.00M	-$14.20M
Free Cash Flow	$232.7M	$278.0M	$161.3M
YoY Change	-16.29%	72.35%	-0.55%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
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CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.32
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CY2020	dei	Entity File Number EntityFileNumber	1-10312
CY2020	dei	Entity Registrant Name EntityRegistrantName	SYNOVUS FINANCIAL CORP
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	GA
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	58-1134883
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CY2019	us-gaap	Noninterest Income Other NoninterestIncomeOther	45360000	USD
CY2018	us-gaap	Noninterest Income Other NoninterestIncomeOther	27831000	USD
CY2020	us-gaap	Noninterest Income NoninterestIncome	506513000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	355900000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	280093000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	618214000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	570036000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	453420000	USD
CY2020	us-gaap	Occupancy Net OccupancyNet	169658000	USD
CY2019	us-gaap	Occupancy Net OccupancyNet	161906000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	130482000	USD
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	83034000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	373695000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	563780000	USD
CY2019	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	75696000	USD
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	58625000	USD
CY2020	us-gaap	Professional Fees ProfessionalFees	56899000	USD
CY2019	us-gaap	Professional Fees ProfessionalFees	35300000	USD
CY2018	us-gaap	Professional Fees ProfessionalFees	26737000	USD
CY2020	syn	Fdic Insurance And Other Regulatory Fees FDICInsuranceAndOtherRegulatoryFees	25210000	USD
CY2019	syn	Fdic Insurance And Other Regulatory Fees FDICInsuranceAndOtherRegulatoryFees	31696000	USD
CY2018	syn	Fdic Insurance And Other Regulatory Fees FDICInsuranceAndOtherRegulatoryFees	24494000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	14387000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	21371000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	20881000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	44877000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	26991000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	1230000	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	-51000	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	56580000	USD
CY2018	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	10065000	USD
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	140304000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	145153000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	104802000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	1179574000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	1098968000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	829455000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	484665000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	765015000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	547354000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	110970000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	201235000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	118878000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	428476000	USD
CY2020	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	33163000	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	22881000	USD
CY2018	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	17998000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	340532000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	540899000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	410478000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.31
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.50
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.49
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.30
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.47
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.47
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	147415000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154331000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	117644000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	148210000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	156058000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	118378000	shares
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	484665000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	110970000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	373695000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	765015000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	201235000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	563780000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	547354000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	118878000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	428476000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	108626000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	28135000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	80491000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	217501000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	56331000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	161170000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-44565000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-11542000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-33023000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	78931000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	20443000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	58488000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-7659000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-1984000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-5675000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-1296000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-336000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-960000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	29695000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	7692000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	22003000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	225160000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	58315000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	166845000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-43269000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-11206000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-32063000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	99193000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	25691000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	73502000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-8570000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-2220000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-6350000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	2765000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	716000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	2049000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	96428000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	24975000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	71453000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	-8570000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-2220000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-6350000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-510000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-132000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-378000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-46000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-12000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-34000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-618000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-156000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	-462000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-70000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-14000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	-56000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-132000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-34000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	-98000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	618000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	156000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	462000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	580000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	146000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	434000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	178000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	46000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	132000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	125505000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	32511000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	92994000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	216010000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	55949000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	160061000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-43447000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-11252000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-32195000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	466689000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	723841000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	396281000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	2961566000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	0	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	428476000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-32195000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.00
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	117355000	USD
CY2018	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	13978000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	175072000	USD
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	7427000	USD
CY2018	syn	Restricted Share Unit Activity RestrictedShareUnitActivity	-8504000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2139000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	16643000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	3133602000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	563780000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	160061000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.20
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	183091000	USD
CY2019	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	22881000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	725398000	USD
CY2019	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	11846000	USD
CY2019	syn	Restricted Share Unit Activity RestrictedShareUnitActivity	-8855000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	16176000	USD
CY2019	syn	Stock Issued During Period Value Warrants Exercised StockIssuedDuringPeriodValueWarrantsExercised	0	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	24487000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	4941690000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	373695000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	92994000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.32
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	194658000	USD
CY2020	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	33163000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	16246000	USD
CY2020	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	8695000	USD
CY2020	syn	Restricted Share Unit Activity RestrictedShareUnitActivity	-7575000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	12982000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	18641000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	5161334000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	373695000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	563780000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	428476000	USD
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CY2018	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	51697000	USD
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	106107000	USD
CY2019	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	8079000	USD
CY2018	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	55172000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-86192000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	86633000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	36215000	USD
CY2020	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	3466170000	USD
CY2019	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	872105000	USD
CY2018	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	543073000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	2936398000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	816223000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	565672000	USD
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	67115000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	21448000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	12291000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	411632000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	127636000	USD
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CY2020	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	281866000	USD
CY2019	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	43066000	USD
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CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	24487000	USD
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CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	55343000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	4592000	USD
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CY2019	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	201100000	USD
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CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	2923787000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	35066000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	7441163000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	4300021000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	700194000	USD
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CY2019	syn	Proceeds From Sale Of Loans ProceedsFromSaleOfLoans	74123000	USD
CY2018	syn	Proceeds From Sale Of Loans ProceedsFromSaleOfLoans	22915000	USD
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CY2020	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	126152000	USD
CY2019	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	667954000	USD
CY2018	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	265934000	USD
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CY2019	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1361693000	USD
CY2018	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	969326000	USD
CY2020	us-gaap	Payments For Proceeds From Federal Reserve Bank Stock PaymentsForProceedsFromFederalReserveBankStock	658000	USD
CY2019	us-gaap	Payments For Proceeds From Federal Reserve Bank Stock PaymentsForProceedsFromFederalReserveBankStock	55335000	USD
CY2018	us-gaap	Payments For Proceeds From Federal Reserve Bank Stock PaymentsForProceedsFromFederalReserveBankStock	25500000	USD
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CY2019	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	45856000	USD
CY2018	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	282000	USD
CY2020	syn	Purchases Of Bank Owned Life Insurance Policies Net Of Settlements PurchasesOfBankOwnedLifeInsurancePoliciesNetOfSettlements	-242300000	USD
CY2019	syn	Purchases Of Bank Owned Life Insurance Policies Net Of Settlements PurchasesOfBankOwnedLifeInsurancePoliciesNetOfSettlements	16637000	USD
CY2018	syn	Purchases Of Bank Owned Life Insurance Policies Net Of Settlements PurchasesOfBankOwnedLifeInsurancePoliciesNetOfSettlements	2412000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	30102000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	61208000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	53159000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-45834000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-19907000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-12854000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2352973000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2153862000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1338049000	USD
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	8284519000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	797612000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	571897000	USD
CY2020	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	62232000	USD
CY2019	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-101142000	USD
CY2018	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	76502000	USD
CY2020	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	1745843000	USD
CY2019	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-1103560000	USD
CY2018	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-550000000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2408939000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	157226000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2230052000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1445492000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	497045000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2280000000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	189967000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	167923000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	106224000	USD
CY2020	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	33163000	USD
CY2019	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	17741000	USD
CY2018	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	13978000	USD
CY2020	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	342005000	USD
CY2018	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	65140000	USD
CY2018	syn	Proceeds From Stock Options And Warrants Exercised Net Of Taxes Paid ProceedsFromStockOptionsAndWarrantsExercisedNetOfTaxesPaid	-6365000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4252917000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16246000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	725398000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	175072000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1552000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1947000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1220000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	5401940000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1576166000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1010628000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	3065999000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	43354000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	210631000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1186918000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1143564000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	932933000	USD
CY2018	syn	Loanstransferredtootherloansheldforsaleatfairvalue Loanstransferredtootherloansheldforsaleatfairvalue	12568000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1186918000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1143564000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	110828000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	101781000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	41008000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	319282000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	464712000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	180241000	USD
CY2020	syn	Stock Issued During Period Value Treasury Stock Reissued Equity Awards Warrants Convertedin Acquisition StockIssuedDuringPeriodValueTreasuryStockReissuedEquityAwardsWarrantsConvertedinAcquisition	0	USD
CY2019	syn	Stock Issued During Period Value Treasury Stock Reissued Equity Awards Warrants Convertedin Acquisition StockIssuedDuringPeriodValueTreasuryStockReissuedEquityAwardsWarrantsConvertedinAcquisition	1625688000	USD
CY2018	syn	Stock Issued During Period Value Treasury Stock Reissued Equity Awards Warrants Convertedin Acquisition StockIssuedDuringPeriodValueTreasuryStockReissuedEquityAwardsWarrantsConvertedinAcquisition	0	USD
CY2020	syn	Loans Foreclosed And Transferred To Other Real Estate LoansForeclosedAndTransferredToOtherRealEstate	2163000	USD
CY2019	syn	Loans Foreclosed And Transferred To Other Real Estate LoansForeclosedAndTransferredToOtherRealEstate	19423000	USD
CY2018	syn	Loans Foreclosed And Transferred To Other Real Estate LoansForeclosedAndTransferredToOtherRealEstate	13168000	USD
CY2020	syn	Loanstransferredtootherloansheldforsaleatfairvalue Loanstransferredtootherloansheldforsaleatfairvalue	49821000	USD
CY2019	syn	Loanstransferredtootherloansheldforsaleatfairvalue Loanstransferredtootherloansheldforsaleatfairvalue	72707000	USD
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	48834000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	44143000	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	28966000	USD
CY2020Q4	syn	Dividends Payable Current And Noncurrent Preferred Stock DividendsPayableCurrentAndNoncurrentPreferredStock	5141000	USD
CY2019Q4	syn	Dividends Payable Current And Noncurrent Preferred Stock DividendsPayableCurrentAndNoncurrentPreferredStock	5141000	USD
CY2018Q4	syn	Dividends Payable Current And Noncurrent Preferred Stock DividendsPayableCurrentAndNoncurrentPreferredStock	0	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:6pt;margin-top:6pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In preparing the consolidated financial statements in accordance with GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the respective consolidated balance sheets and the reported amounts of revenues and expenses for the periods presented. Actual results could differ significantly from those estimates.</span></div><div style="margin-bottom:6pt;margin-top:6pt;text-align:justify;text-indent:18pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Material estimates that are particularly susceptible to significant change relate to the determination of the ACL; estimates of fair value, including goodwill impairment assessment; income taxes; and contingent liabilities.</span></div>
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	281402000	USD
CY2020Q1	syn	Reserve For Unfunded Commitments ReserveForUnfundedCommitments	1375000	USD
CY2019Q4	syn	Cash On Deposit Per Federal Reserve Bank Requirements CashOnDepositPerFederalReserveBankRequirements	111500000	USD
CY2020Q4	syn	Short Term Investments Restricted Derivatives ShortTermInvestmentsRestrictedDerivatives	158700000	USD
CY2019Q4	syn	Short Term Investments Restricted Derivatives ShortTermInvestmentsRestrictedDerivatives	87800000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	77700000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	25400000	USD
CY2020Q1	syn	All Financing Receivable Allowance For Credit Loss AllFinancingReceivableAllowanceForCreditLoss	282777000	USD
CY2020Q1	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	36881048000	USD
CY2020Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1068327000	USD
CY2020	us-gaap	Other Restructuring Costs OtherRestructuringCosts	855000	USD
CY2019	us-gaap	Other Restructuring Costs OtherRestructuringCosts	133000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	142500000	USD
CY2019Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	141700000	USD
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CY2020Q4	syn	Federal Reserve Bank Stock Required Percentof Deposits FederalReserveBankStockRequiredPercentofDeposits	0.006
CY2020Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	15000000.0	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	144700000	USD
CY2020	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="margin-bottom:6pt;margin-top:9pt;text-align:justify;text-indent:18pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Recently Adopted Accounting Standards</span></div><div style="margin-bottom:6pt;margin-top:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">ASU 2020-04, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting (ASC 848)</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">.</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Synovus adopted ASU 2020-04 effective October 1, 2020. </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">This ASU provides temporary, optional guidance to ease the potential burden in accounting for, or recognizing the effects of, the transition away from the LIBOR or other interbank offered rate on financial reporting. To help with the transition to new reference rates, the ASU provides optional expedients and exceptions for applying GAAP to affected contract modifications and hedge accounting relationships. The main provisions include:</span></div><div style="margin-top:6pt;padding-left:36pt;text-align:justify;text-indent:-18pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">A change in a contract’s reference interest rate would be accounted for as a continuation of that contract rather than as the creation of a new one for contracts, including loans, debt, leases, and other arrangements, that meet specific criteria.</span></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">When updating its hedging strategies in response to reference rate reform, an entity would be allowed to preserve its hedge accounting.</span></div><div style="margin-bottom:6pt;margin-top:6pt;text-align:justify;text-indent:18pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The guidance is applicable only to contracts or hedge accounting relationships that reference LIBOR or another reference rate expected to be discontinued. Because the guidance is meant to help entities through the transition period, it will be in effect for a limited time and will not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, for which an entity has elected certain optional expedients that are retained through the end of the hedging relationship. The amendments in this ASU are effective </span></div><div style="margin-bottom:6pt;margin-top:6pt;text-align:justify"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">March 12, 2020 through December 31, 2022. Synovus will apply the relief provided by ASU 2020-04 to eligible contract modifications with no material impact expected impac</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">t at this time.</span></div><div style="margin-bottom:6pt;margin-top:6pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:115%">Recently Issued Accounting Standards Not Yet Adopted</span></div><div style="margin-bottom:6pt;margin-top:6pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">ASU 2020-08, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">Codification Improvements to Subtopic 310-20, Receivables – Nonrefundable Fees and Other Costs</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. The guidance in this ASU pertains to the shortened amortization period for certain purchased callable debt securities held a</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">t a premium, which premium is amortized to the earliest call date in accordance with ASC 310-20-25-33, and clarifies that an entity should reevaluate whether a callable debt security is within the scope of paragraph 310-20-25-33 for each reporting period. The amendments in this ASU are effective for fiscal years beginning after December 15, 2020. Early adoption is not permitted. We do not expect a material impact upon adoption.</span></div><div style="margin-bottom:6pt;margin-top:6pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. This update provides, among other things, simplifications for accounting for income taxes by removing certain exceptions. The amendments in this ASU are effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years, with early adoption permitted. We will adopt this ASU upon the effective date and do not expect it to have a material impact upon adoption.</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">.</span></div>
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CY2018	us-gaap	Restructuring Charges RestructuringCharges	-51000	USD
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CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	7496089000	USD
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CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	99848000	USD
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CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	77700000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	25400000	USD
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CY2020	us-gaap	Loans And Leases Receivable Impaired Interest Income Recognized Change In Present Value Attributable To Passage Of Time LoansAndLeasesReceivableImpairedInterestIncomeRecognizedChangeInPresentValueAttributableToPassageOfTime	3900000	USD
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CY2019Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	12110000000	USD
CY2020Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	8763771000	USD
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CY2020Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	2595487000	USD
CY2020Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	4701977000	USD
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CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	77700000	USD
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CY2019	syn	Allowancefor Loanand Lease Losses Percentof Loan Amount AllowanceforLoanandLeaseLossesPercentofLoanAmount	0.50
CY2019Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	25400000	USD
CY2020	us-gaap	Financing Receivable Change In Method Credit Loss Expense Reversal FinancingReceivableChangeInMethodCreditLossExpenseReversal	18300000	USD
CY2020	us-gaap	Financing Receivable Transfer To Held For Sale Allowance For Credit Loss Expense Reversal FinancingReceivableTransferToHeldForSaleAllowanceForCreditLossExpenseReversal	1430000000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	281402000	USD
CY2020	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	119262000	USD
CY2020	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	24550000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	336052000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	605736000	USD
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CY2019	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	79135000	USD
CY2019	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	21523000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	87720000	USD
CY2019	syn	Transferofunfundedcommitmentreserve Transferofunfundedcommitmentreserve	739000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	281402000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	249268000	USD
CY2018	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	74054000	USD
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CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	51697000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	250555000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	605700000	USD
CY2020Q4	syn	Reserve For Unfunded Commitments ReserveForUnfundedCommitments	47800000	USD
CY2020Q4	syn	All Financing Receivable Allowance For Credit Loss AllFinancingReceivableAllowanceForCreditLoss	653500000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	355000000.0	USD
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	352	contract
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	76615000	USD
CY2019	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	380	contract
CY2019	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	49859000	USD
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CY2018	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	49827000	USD
CY2020	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	USD
CY2019	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	USD
CY2018	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	403000	USD
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CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	605390000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	579231000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	463959000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	493940000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3400000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4600000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	51600000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	49200000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	42600000	USD
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CY2019	syn	Premises And Equipment Transferred To Other Assets Held For Sale PremisesAndEquipmentTransferredToOtherAssetsHeldForSale	6100000	USD
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CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	14229000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	55671000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	57315000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	439952000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	497267000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	44877000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	452390000	USD
CY2020Q4	syn	Percent Of Income Based Discounted Cash Flow Approach Used PercentOfIncomeBasedDiscountedCashFlowApproachUsed	0.60
CY2020Q4	syn	Percent Of Market Based Approach Used PercentOfMarketBasedApproachUsed	0.40
CY2020Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	37600000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	69900000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	24788000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	45112000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	69900000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	9516000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	8472000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	7429000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	6366000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	5266000	USD
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	401295000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	140016000	USD
CY2020Q4	syn	Leases Rightof Use Asset LeasesRightofUseAsset	380380000	USD
CY2019Q4	syn	Leases Rightof Use Asset LeasesRightofUseAsset	374716000	USD
CY2020Q4	syn	Taxcreditpartnerships Taxcreditpartnerships	262855000	USD
CY2019Q4	syn	Taxcreditpartnerships Taxcreditpartnerships	146612000	USD
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	177865000	USD
CY2019Q4	us-gaap	Interest Receivable InterestReceivable	127641000	USD
CY2020Q4	syn	Federal Reserve Bank Stock And Federal Home Loan Bank Stock FederalReserveBankStockAndFederalHomeLoanBankStock	157520000	USD
CY2019Q4	syn	Federal Reserve Bank Stock And Federal Home Loan Bank Stock FederalReserveBankStockAndFederalHomeLoanBankStock	286447000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	130848000	USD
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	65102000	USD
CY2020Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	88286000	USD
CY2019Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	77193000	USD
CY2020Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	45088000	USD
CY2019Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	42285000	USD
CY2020Q4	syn	Mutual Fundsand Mutual Funds Held In Rabbi Trusts MutualFundsandMutualFundsHeldInRabbiTrusts	37650000	USD
CY2019Q4	syn	Mutual Fundsand Mutual Funds Held In Rabbi Trusts MutualFundsandMutualFundsHeldInRabbiTrusts	32348000	USD
CY2020Q4	syn	Merchant Payment Services Receivables MerchantPaymentServicesReceivables	15575000	USD
CY2019Q4	syn	Merchant Payment Services Receivables MerchantPaymentServicesReceivables	21437000	USD
CY2020Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	10880000	USD
CY2019Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	7212000	USD
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1819000	USD
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	14373000	USD
CY2020Q4	syn	Private Equity Investments PrivateEquityInvestments	1021000	USD
CY2019Q4	syn	Private Equity Investments PrivateEquityInvestments	19389000	USD
CY2020Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	0	USD
CY2019Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	8648000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	49517000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	55511000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	1760599000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	1418930000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	8838710000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	6470570000	USD
CY2020Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	15277829000	USD
CY2019Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	11227134000	USD
CY2020Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1168672000	USD
CY2019Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	918109000	USD
CY2020Q4	syn	Time Deposits Excluding Brokered Deposits TimeDepositsExcludingBrokeredDeposits	4358100000	USD
CY2019Q4	syn	Time Deposits Excluding Brokered Deposits TimeDepositsExcludingBrokeredDeposits	6920213000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	3570406000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	3429993000	USD
CY2020Q4	syn	Interest Bearing Deposit Liabilities And Time Deposits InterestBearingDepositLiabilitiesAndTimeDeposits	33213717000	USD
CY2019Q4	syn	Interest Bearing Deposit Liabilities And Time Deposits InterestBearingDepositLiabilitiesAndTimeDeposits	28966019000	USD
CY2020Q4	syn	Time Deposits250000or More TimeDeposits250000orMore	1820000000	USD
CY2019Q4	syn	Time Deposits250000or More TimeDeposits250000orMore	2630000000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	4016764000	USD
CY2020Q4	syn	Time Deposits Maturing In Year One And Two TimeDepositsMaturingInYearOneAndTwo	1303259000	USD
CY2020Q4	syn	Time Deposits Maturing In Years Two And Three TimeDepositsMaturingInYearsTwoAndThree	505709000	USD
CY2020Q4	syn	Time Deposits Maturing In Years Three And Four TimeDepositsMaturingInYearsThreeAndFour	33768000	USD
CY2020Q4	syn	Time Deposits Maturing In Years Four And Five TimeDepositsMaturingInYearsFourAndFive	80242000	USD
CY2020Q4	syn	Time Deposits Maturingin After Five Years TimeDepositsMaturinginAfterFiveYears	8454000	USD
CY2020Q4	us-gaap	Time Deposits TimeDeposits	5948196000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	227922000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	165690000	USD
CY2020Q4	us-gaap	Trading Liabilities TradingLiabilities	7717000	USD
CY2019Q4	us-gaap	Trading Liabilities TradingLiabilities	1560000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	0	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	1752000000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	235639000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	1919250000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	235639000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	1919250000	USD
CY2018Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	887692000	USD
CY2020Q4	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.0011
CY2019Q4	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.0160
CY2018Q4	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.0193
CY2020	us-gaap	Shortterm Debt Maximum Monthend Outstanding Amount ShorttermDebtMaximumMonthendOutstandingAmount	1973523000	USD
CY2019	us-gaap	Shortterm Debt Maximum Monthend Outstanding Amount ShorttermDebtMaximumMonthendOutstandingAmount	2431012000	USD
CY2018	us-gaap	Shortterm Debt Maximum Monthend Outstanding Amount ShorttermDebtMaximumMonthendOutstandingAmount	887692000	USD
CY2020	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	685664000	USD
CY2019	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	1360214000	USD
CY2018	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	371933000	USD
CY2020	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0115
CY2019	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0193
CY2018	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0096
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1202494000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	2153897000	USD
CY2019Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	325000000.0	USD
CY2018Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	150000000.0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	300145000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	400000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	510000000	USD
CY2020Q4	syn	Long Term Debt Before Hedge Related Basis Adjustment LongTermDebtBeforeHedgeRelatedBasisAdjustment	1210145000	USD
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	19903000	shares
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	450000	shares
CY2019Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	725000000.0	USD
CY2019Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	400000000.0	USD
CY2019Q1	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	913000	shares
CY2019	syn	Stock Issued During Period Warrants Exercisedand Common Stock Reissued StockIssuedDuringPeriodWarrantsExercisedandCommonStockReissued	263000	shares
CY2018	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-33057000	USD
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-862000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-32195000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	154442000	USD
CY2019	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	5619000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	160061000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	153993000	USD
CY2020	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	60999000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	92994000	USD
CY2020Q4	syn	Capital Conservation Buffer CapitalConservationBuffer	0.025
CY2020Q4	syn	Common Equity Tier One CommonEquityTierOne	4034865000	USD
CY2019Q4	syn	Common Equity Tier One CommonEquityTierOne	3743459000	USD
CY2020Q4	syn	Common Equity Tier One Requiredfor Capital Adequacy CommonEquityTierOneRequiredforCapitalAdequacy	1879551000	USD
CY2019Q4	syn	Common Equity Tier One Requiredfor Capital Adequacy CommonEquityTierOneRequiredforCapitalAdequacy	1882424000	USD
CY2020Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	4572010000	USD
CY2019Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	4280604000	USD
CY2020Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	2506068000	USD
CY2019Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	2509899000	USD
CY2020Q4	us-gaap	Capital Capital	5604230000	USD
CY2019Q4	us-gaap	Capital Capital	5123381000	USD
CY2020Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	3341425000	USD
CY2019Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	3346531000	USD
CY2020Q4	syn	Common Equity Tier Oneto Risk Weighted Assets CommonEquityTierOnetoRiskWeightedAssets	0.0966
CY2019Q4	syn	Common Equity Tier Oneto Risk Weighted Assets CommonEquityTierOnetoRiskWeightedAssets	0.0895
CY2020Q4	syn	Common Equity Tier One Capital Requiredfor Capital Adequacyto Risk Weighted Assets CommonEquityTierOneCapitalRequiredforCapitalAdequacytoRiskWeightedAssets	0.0450
CY2019Q4	syn	Common Equity Tier One Capital Requiredfor Capital Adequacyto Risk Weighted Assets CommonEquityTierOneCapitalRequiredforCapitalAdequacytoRiskWeightedAssets	0.0450
CY2020Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1095
CY2019Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1023
CY2020Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2019Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2020Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1342
CY2019Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1225
CY2020Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2019Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2020Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0850
CY2019Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0916
CY2020Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2019Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2020	us-gaap	Net Income Loss NetIncomeLoss	373695000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	563780000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	428476000	USD
CY2020	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	33163000	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	22881000	USD
CY2018	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	17998000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	340532000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	540899000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	410478000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	147415000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154331000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	117644000	shares
CY2020	syn	Potentially Dilutive Shares From Assumed Exercise Of Securities Or Other Contracts To Purchase Common Stock PotentiallyDilutiveSharesFromAssumedExerciseOfSecuritiesOrOtherContractsToPurchaseCommonStock	795000	shares
CY2019	syn	Potentially Dilutive Shares From Assumed Exercise Of Securities Or Other Contracts To Purchase Common Stock PotentiallyDilutiveSharesFromAssumedExerciseOfSecuritiesOrOtherContractsToPurchaseCommonStock	1727000	shares
CY2018	syn	Potentially Dilutive Shares From Assumed Exercise Of Securities Or Other Contracts To Purchase Common Stock PotentiallyDilutiveSharesFromAssumedExerciseOfSecuritiesOrOtherContractsToPurchaseCommonStock	734000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	148210000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	156058000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	118378000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.31
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.50
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.49
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.30
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.47
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.47
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	515000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	40000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020	syn	Change In Mortgage Loans Held For Sale Included In Net Income ChangeInMortgageLoansHeldForSaleIncludedInNetIncome	3400000	USD
CY2019	syn	Change In Mortgage Loans Held For Sale Included In Net Income ChangeInMortgageLoansHeldForSaleIncludedInNetIncome	1675000	USD
CY2018	syn	Change In Mortgage Loans Held For Sale Included In Net Income ChangeInMortgageLoansHeldForSaleIncludedInNetIncome	95000	USD
CY2020Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	216647000	USD
CY2019Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	115173000	USD
CY2018Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	37129000	USD
CY2020Q4	syn	Fair Value Option Aggregate Unpaid Principal Balance Of Mortgage Loans Held For Sale FairValueOptionAggregateUnpaidPrincipalBalanceOfMortgageLoansHeldForSale	210292000	USD
CY2019Q4	syn	Fair Value Option Aggregate Unpaid Principal Balance Of Mortgage Loans Held For Sale FairValueOptionAggregateUnpaidPrincipalBalanceOfMortgageLoansHeldForSale	112218000	USD
CY2018Q4	syn	Fair Value Option Aggregate Unpaid Principal Balance Of Mortgage Loans Held For Sale FairValueOptionAggregateUnpaidPrincipalBalanceOfMortgageLoansHeldForSale	35848000	USD
CY2020Q4	us-gaap	Fair Value Option Aggregate Differences Long Term Debt Instruments FairValueOptionAggregateDifferencesLongTermDebtInstruments	6355000	USD
CY2019Q4	us-gaap	Fair Value Option Aggregate Differences Long Term Debt Instruments FairValueOptionAggregateDifferencesLongTermDebtInstruments	2955000	USD
CY2018Q4	us-gaap	Fair Value Option Aggregate Differences Long Term Debt Instruments FairValueOptionAggregateDifferencesLongTermDebtInstruments	1281000	USD
CY2020	syn	Amortization Of Terminated Cash Flow Hedges Income Recognized AmortizationOfTerminatedCashFlowHedgesIncomeRecognized	2800000	USD
CY2020	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	40000000	USD
CY2020	syn	Cash Flow Hedge Termination Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeTerminationGainLossToBeReclassifiedWithinTwelveMonths	5000000	USD
CY2020Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	155400000	USD
CY2019Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	84600000	USD
CY2020Q4	syn	Variation Margin Amount Reducing Derivative Liability VariationMarginAmountReducingDerivativeLiability	162700000	USD
CY2019Q4	syn	Variation Margin Amount Reducing Derivative Liability VariationMarginAmountReducingDerivativeLiability	113700000	USD
CY2020	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	22215000	USD
CY2019	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	0	USD
CY2018	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	0	USD
CY2020Q4	syn	Reserve For Unfunded Commitments ReserveForUnfundedCommitments	47800000	USD
CY2020Q4	us-gaap	Affordable Housing Program Obligation AffordableHousingProgramObligation	262855000	USD
CY2019Q4	us-gaap	Affordable Housing Program Obligation AffordableHousingProgramObligation	146612000	USD
CY2020Q4	syn	Affordable Housing Program Obligation Future Funding Includedin Carrying Amount AffordableHousingProgramObligationFutureFundingIncludedinCarryingAmount	133946000	USD
CY2019Q4	syn	Affordable Housing Program Obligation Future Funding Includedin Carrying Amount AffordableHousingProgramObligationFutureFundingIncludedinCarryingAmount	78266000	USD
CY2020Q4	syn	Affordable Housing Program Obligation Shortterm Construction Loansand Letterof Credit Commitments AffordableHousingProgramObligationShorttermConstructionLoansandLetterofCreditCommitments	84552000	USD
CY2019Q4	syn	Affordable Housing Program Obligation Shortterm Construction Loansand Letterof Credit Commitments AffordableHousingProgramObligationShorttermConstructionLoansandLetterofCreditCommitments	2124000	USD
CY2020Q4	syn	Affordable Housing Program Obligation Funded Portionof Shortterm Loansand Lettersof Credit AffordableHousingProgramObligationFundedPortionofShorttermLoansandLettersofCredit	9762000	USD
CY2019Q4	syn	Affordable Housing Program Obligation Funded Portionof Shortterm Loansand Lettersof Credit AffordableHousingProgramObligationFundedPortionofShorttermLoansandLettersofCredit	3196000	USD
CY2020Q4	syn	Contractual Amount Net Of Risk Participations ContractualAmountNetOfRiskParticipations	30000000	USD
CY2019Q4	syn	Contractual Amount Net Of Risk Participations ContractualAmountNetOfRiskParticipations	33000000	USD
CY2020Q4	syn	Guarantor Obligations Advanced Payment From Merchant Reserve GuarantorObligationsAdvancedPaymentFromMerchantReserve	2700000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P3Y
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4800000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	6300000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4300000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	26100000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y5M19D
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3037000	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	22.74
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	640000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.93
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	775000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	17.85
CY2020	syn	Sharebased Compensation Arrangementby Sharebased Payment Award Options Assumedin Acquisition SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsAssumedinAcquisition	0	shares
CY2020	syn	Sharebased Compensation Arrangementsby Sharebased Payment Award Options Assumedin Acquisition Weighted Average Exercise Price SharebasedCompensationArrangementsbySharebasedPaymentAwardOptionsAssumedinAcquisitionWeightedAverageExercisePrice	0
CY2019	syn	Sharebased Compensation Arrangementby Sharebased Payment Award Options Assumedin Acquisition SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsAssumedinAcquisition	3230000	shares
CY2019	syn	Sharebased Compensation Arrangementsby Sharebased Payment Award Options Assumedin Acquisition Weighted Average Exercise Price SharebasedCompensationArrangementsbySharebasedPaymentAwardOptionsAssumedinAcquisitionWeightedAverageExercisePrice	23.22
CY2018	syn	Sharebased Compensation Arrangementby Sharebased Payment Award Options Assumedin Acquisition SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsAssumedinAcquisition	0	shares
CY2018	syn	Sharebased Compensation Arrangementsby Sharebased Payment Award Options Assumedin Acquisition Weighted Average Exercise Price SharebasedCompensationArrangementsbySharebasedPaymentAwardOptionsAssumedinAcquisitionWeightedAverageExercisePrice	0
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	572000	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	22.67
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	820000	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	19.91
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	126000	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	16.92
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	64000	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	33.50
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	13000	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	34.23
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	9000	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	92.26
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2401000	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	22.47
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3037000	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	22.74
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	640000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.93
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2401000	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	22.47
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2399000	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	19.52
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	640000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	16.93
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	25100000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y3M7D
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	5300000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	5300000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	13600000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	4400000	USD
CY2020	syn	Sharebased Compensation Arrangementby Sharebased Payment Award Award Performance Period SharebasedCompensationArrangementbySharebasedPaymentAwardAwardPerformancePeriod	P3Y
CY2020	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
CY2020	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.05
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	21300000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	18800000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	15700000	USD
CY2020	syn	Defined Contribution Plan Stock Purchase Plan Percent Of Mmatch DefinedContributionPlanStockPurchasePlanPercentOfMmatch	0.15
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	1100000	USD
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	1100000	USD
CY2018	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	942000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	187741000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	112517000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	75582000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	9421000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2085000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7081000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	197162000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	114602000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	82663000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-90777000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	46182000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	24894000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	4585000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	40451000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	11321000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-86192000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	86633000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	36215000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	110970000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	201235000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	118878000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	101779000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	160653000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	114944000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	11168000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	33764000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	17270000	USD
CY2020	syn	Effective Income Tax Rate Reconciliation Affordable Housing Projects Tax Creditsand Other Tax Benefits EffectiveIncomeTaxRateReconciliationAffordableHousingProjectsTaxCreditsandOtherTaxBenefits	13858000	USD
CY2019	syn	Effective Income Tax Rate Reconciliation Affordable Housing Projects Tax Creditsand Other Tax Benefits EffectiveIncomeTaxRateReconciliationAffordableHousingProjectsTaxCreditsandOtherTaxBenefits	8454000	USD
CY2018	syn	Effective Income Tax Rate Reconciliation Affordable Housing Projects Tax Creditsand Other Tax Benefits EffectiveIncomeTaxRateReconciliationAffordableHousingProjectsTaxCreditsandOtherTaxBenefits	6421000	USD
CY2020	syn	Effective Income Tax Rate Reconciliation Affordable Housing Projects Amortization EffectiveIncomeTaxRateReconciliationAffordableHousingProjectsAmortization	11247000	USD
CY2019	syn	Effective Income Tax Rate Reconciliation Affordable Housing Projects Amortization EffectiveIncomeTaxRateReconciliationAffordableHousingProjectsAmortization	6871000	USD
CY2018	syn	Effective Income Tax Rate Reconciliation Affordable Housing Projects Amortization EffectiveIncomeTaxRateReconciliationAffordableHousingProjectsAmortization	5316000	USD
CY2020	syn	Effective Income Tax Rate Reconciliation Goodwill Impairment EffectiveIncomeTaxRateReconciliationGoodwillImpairment	9424000	USD
CY2019	syn	Effective Income Tax Rate Reconciliation Goodwill Impairment EffectiveIncomeTaxRateReconciliationGoodwillImpairment	0	USD
CY2018	syn	Effective Income Tax Rate Reconciliation Goodwill Impairment EffectiveIncomeTaxRateReconciliationGoodwillImpairment	0	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	9207000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	6564000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3599000	USD
CY2020	syn	Effective Income Tax Rate Reconciliation Fdic Premiums EffectiveIncomeTaxRateReconciliationFDICPremiums	4744000	USD
CY2019	syn	Effective Income Tax Rate Reconciliation Fdic Premiums EffectiveIncomeTaxRateReconciliationFDICPremiums	5802000	USD
CY2018	syn	Effective Income Tax Rate Reconciliation Fdic Premiums EffectiveIncomeTaxRateReconciliationFDICPremiums	2529000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	0	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	-9865000	USD
CY2020	syn	Effective Income Tax Rate Reconciliation Executive Compensation EffectiveIncomeTaxRateReconciliationExecutiveCompensation	1501000	USD
CY2019	syn	Effective Income Tax Rate Reconciliation Executive Compensation EffectiveIncomeTaxRateReconciliationExecutiveCompensation	6385000	USD
CY2018	syn	Effective Income Tax Rate Reconciliation Executive Compensation EffectiveIncomeTaxRateReconciliationExecutiveCompensation	443000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	657000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	678000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	1163000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	311000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-1337000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-2801000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-3431000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-5482000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	4793000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	5656000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	110970000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	201235000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	118878000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.229
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.263
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.217
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	165691000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	73929000	USD
CY2020Q4	syn	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	98340000	USD
CY2019Q4	syn	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	99053000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	29684000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	38972000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	27917000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	28874000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	24751000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	8237000	USD
CY2020Q4	syn	Deferred Tax Assets Non Performing Loan Interest DeferredTaxAssetsNonPerformingLoanInterest	12472000	USD
CY2019Q4	syn	Deferred Tax Assets Non Performing Loan Interest DeferredTaxAssetsNonPerformingLoanInterest	5232000	USD
CY2020Q4	syn	Deferred Tax Assets Fair Value Of Investment Securities And Loans DeferredTaxAssetsFairValueOfInvestmentSecuritiesAndLoans	10093000	USD
CY2019Q4	syn	Deferred Tax Assets Fair Value Of Investment Securities And Loans DeferredTaxAssetsFairValueOfInvestmentSecuritiesAndLoans	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	8605000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	21076000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	9819000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	15101000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	387372000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	290474000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	19191000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	18445000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	368181000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	272029000	USD
CY2020Q4	syn	Deferred Tax Liability Right Of Use Asset DeferredTaxLiabilityRightOfUseAsset	98681000	USD
CY2019Q4	syn	Deferred Tax Liability Right Of Use Asset DeferredTaxLiabilityRightOfUseAsset	97400000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	64344000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	31678000	USD
CY2020Q4	syn	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	40452000	USD
CY2019Q4	syn	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	41097000	USD
CY2020Q4	syn	Deferred Tax Liabilities Purchase Accounting DeferredTaxLiabilitiesPurchaseAccounting	14458000	USD
CY2019Q4	syn	Deferred Tax Liabilities Purchase Accounting DeferredTaxLiabilitiesPurchaseAccounting	15184000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	5955000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	5664000	USD
CY2020Q4	syn	Deferred Tax Liabilities Fair Valueof Investment Securitiesand Loans DeferredTaxLiabilitiesFairValueofInvestmentSecuritiesandLoans	0	USD
CY2019Q4	syn	Deferred Tax Liabilities Fair Valueof Investment Securitiesand Loans DeferredTaxLiabilitiesFairValueofInvestmentSecuritiesandLoans	8602000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	13443000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	7302000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	237333000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	206927000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	130848000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	65102000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	746000	USD
CY2020Q4	syn	Deferred Tax Assets Amount Expected To Be Realized DeferredTaxAssetsAmountExpectedToBeRealized	130800000	USD
CY2020Q4	syn	Deferred Tax Assets Amount Expected To Be Realized DeferredTaxAssetsAmountExpectedToBeRealized	130800000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration	130800000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Not Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration	111800000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	20994000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18586000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15117000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	461000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	550000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1165000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	147000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	2321000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	3464000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	327000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1589000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	820000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	17000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	17000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	205000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	20250000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	20994000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18586000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	2700000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	3300000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	227000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	19100000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	20400000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	15200000	USD
CY2020Q4	syn	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccruedThatWouldImpactEffectiveTaxRate	-366000	USD
CY2019Q4	syn	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccruedThatWouldImpactEffectiveTaxRate	1400000	USD
CY2018Q4	syn	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccruedThatWouldImpactEffectiveTaxRate	193000	USD
CY2020Q4	us-gaap	Increase In Unrecognized Tax Benefits Is Reasonably Possible IncreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	83000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	78900000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1512748000	USD
CY2020	us-gaap	Noninterest Income NoninterestIncome	506513000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	1179574000	USD
CY2020	us-gaap	Revenues Revenues	839687000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	38252984000	USD
CY2020Q4	us-gaap	Deposits Deposits	46691571000	USD
CY2020Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	5134	employee
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	37162450000	USD
CY2019Q4	us-gaap	Deposits Deposits	38405504000	USD
CY2019Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	5264	employee

Files In Submission

Name	View Source	Status
0000018349-21-000014-index-headers.html	Edgar Link	pending
0000018349-21-000014-index.html	Edgar Link	pending
0000018349-21-000014.txt	Edgar Link	pending
0000018349-21-000014-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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report.css	Edgar Link	pending
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snv_12312020xfilingxex1025.htm	Edgar Link	pending
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syn-20201231_cal.xml	Edgar Link	unprocessable
syn-20201231_def.xml	Edgar Link	unprocessable
syn-20201231_g1.jpg	Edgar Link	pending
syn-20201231_g2.jpg	Edgar Link	pending
syn-20201231_htm.xml	Edgar Link	completed
syn-20201231_lab.xml	Edgar Link	unprocessable
syn-20201231_pre.xml	Edgar Link	unprocessable

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$SNV
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2020 Q4 Form 10-K Financial Statement

#000001834921000014 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SNV SYNOVUS FINANCIAL CORP Stock $snv

2020 Q4 Form 10-K Financial Statement

#000001834921000014 Filed on March 01, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SNV
SYNOVUS FINANCIAL CORP Stock $snv