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Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Non-hedging derivative financial instruments    
Derivative Financial Instruments    
Notional or contractual amount $ 873,885 $ 887,988
Asset derivatives, Fair value 19,816 24,929
Liability derivatives, Fair value 20,110 25,307
Interest rate swap contracts    
Derivative Financial Instruments    
Asset derivatives, Fair value 19,724 24,838
Interest rate swap contracts | Non-hedging derivative financial instruments    
Derivative Financial Instruments    
Notional or contractual amount 866,390 881,600
Asset derivatives, Fair value 19,724 24,838
Liability derivatives, Fair value 20,094 25,307
Loan commitments | Non-hedging derivative financial instruments    
Derivative Financial Instruments    
Notional or contractual amount 3,495 2,638
Asset derivatives, Fair value 92 67
Liability derivatives, Fair value 0 0
Forward contracts - mortgage loan | Non-hedging derivative financial instruments    
Derivative Financial Instruments    
Notional or contractual amount 4,000 3,750
Asset derivatives, Fair value 0 24
Liability derivatives, Fair value $ 16 $ 0