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Financial Statement Presentation, Recently Adopted Accounting Standards (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Jun. 30, 2021
Dec. 31, 2020
Recently Adopted Accounting Standards [Abstract]          
Allowance for credit losses on securities available for sale $ 0        
Allowance for credit losses on securities held to maturity 0        
Assets [Abstract]          
Allowance for credit losses on loans 45,285   $ 44,267 $ 50,155 $ 49,595
Liabilities and Shareholders' Equity [Abstract]          
Undivided Profits 367,100   349,056    
Pre-CECL Adoption [Member]          
Assets [Abstract]          
Allowance for credit losses on loans     44,267    
Allowance for credit losses on securities     0    
Liabilities and Shareholders' Equity [Abstract]          
Tax Effect, net     0    
Total     44,285    
Undivided Profits     349,056    
Unfunded Loan Commitment [Member]          
Assets [Abstract]          
Allowance for credit losses on loans $ 3,162 $ 2,653 18    
Unfunded Loan Commitment [Member] | Pre-CECL Adoption [Member]          
Liabilities and Shareholders' Equity [Abstract]          
Other liabilities (ACL unfunded loan commitments)     18    
ASU 2016-13 [Member]          
Assets [Abstract]          
Allowance for credit losses on loans     46,620    
Allowance for credit losses on securities     0    
Liabilities and Shareholders' Equity [Abstract]          
Tax Effect, net     0    
Total     48,973    
Undivided Profits     345,586    
ASU 2016-13 [Member] | Impact of Adoption [Member]          
Assets [Abstract]          
Allowance for credit losses on loans     2,353    
ASU 2016-13 [Member] | Unfunded Loan Commitment [Member]          
Assets [Abstract]          
Allowance for credit losses on loans     2,353    
Liabilities and Shareholders' Equity [Abstract]          
Other liabilities (ACL unfunded loan commitments)     2,353    
ASU 2016-13 [Member] | Unfunded Loan Commitment [Member] | Impact of Adoption [Member]          
Assets [Abstract]          
Allowance for credit losses on loans     2,335    
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]          
Recently Adopted Accounting Standards [Abstract]          
Allowance for credit losses on securities available for sale     0    
Allowance for credit losses on securities held to maturity     0    
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Impact of Adoption [Member]          
Assets [Abstract]          
Allowance for credit losses on loans     2,353    
Allowance for credit losses on securities     0    
Liabilities and Shareholders' Equity [Abstract]          
Tax Effect, net     (1,218)    
Total     3,470    
Undivided Profits     (3,470)    
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Unfunded Loan Commitment [Member] | Impact of Adoption [Member]          
Liabilities and Shareholders' Equity [Abstract]          
Other liabilities (ACL unfunded loan commitments)     $ 2,335