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Allowance For Credit Losses (Details) - USD ($)
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]            
Loans collectively evaluated for impairment $ 7,159,767,000   $ 7,058,897,000      
Loan balance 7,208,109,000   7,141,891,000      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 1,088,757,000   1,069,226,000      
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 87,206,000 $ 85,946,000 85,379,000 $ 81,448,000 $ 78,861,000 $ 83,197,000
Retained Earnings [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 876,830,000 $ 862,518,000 847,235,000 $ 814,241,000 $ 797,033,000 $ 776,294,000
PPP loans receivable [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Loan balance $ 3,078,000   4,206,000      
Cumulative Effect, Period of Adoption, Adjustment            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest     383,000      
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02 [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest     383,000      
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02 [Member] | Retained Earnings [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest     $ 303,000