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Allowance For Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery [Abstract]
PPP loans originated [Line Items]	$ 37,400
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	6,751,410	$ 6,789,471
Loan balance	6,821,606	6,871,122
Financing Receivable, Allowance for Credit Loss	78,861	83,197	$ 86,886	$ 85,675
Off-Balance Sheet, Credit Loss, Liability	3,771	4,282
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,076,366	1,110,759
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss				6,090
Off-Balance Sheet, Credit Loss, Liability				3,900
Deferred Tax Liabilities, Net				(2,100)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest				$ (8,000)
7000 Hotels, Rooming Houses, Camps and Other Lodging Places
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	148,108	148,018
Additional Reserve Pandemic Risk	1,670	2,226
Loan balance	206,200	203,900
7000 Hotels, Rooming Houses, Camps and Other Lodging Places | Financial Asset Originated
Financing Receivable, Allowance for Credit Loss [Line Items]
Additional Reserve Pandemic Risk	2,100	2,000
722110 Full-Service Restaurants
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	44,606	40,648
Additional Reserve Pandemic Risk	754	917
5331 Retail, Variety Stores
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	167,099	184,171
Additional Reserve Pandemic Risk	1,384	2,033
Hotels, Restaurants, Strip Shopping Total
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	359,813	372,837
Additional Reserve Pandemic Risk	$ 3,808	$ 5,176

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PPP loans originated

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

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