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Fair Value of Assets and Liabilities - Assets Measured at Fair Value Nonrecurring (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Nonrecurring Basis        
Allowance for credit loss $ 53,303 $ 53,162 $ 54,768 $ 63,967
Nonrecurring Basis | Level 2        
Nonrecurring Basis        
Loans held for sale 1,251 1,254    
Other real estate owned 0 0    
Allowance for credit loss 99 105    
Nonrecurring Basis | Level 2 | Collateral dependent loans        
Nonrecurring Basis        
Collateral dependent loans 0 0    
Nonrecurring Basis | Level 3        
Nonrecurring Basis        
Loans held for sale 0 0    
Other real estate owned 0 55    
Nonrecurring Basis | Level 3 | Collateral dependent loans        
Nonrecurring Basis        
Collateral dependent loans $ 8,860 $ 10,354