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Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Non-hedging derivative financial instruments    
Derivative Financial Instruments    
Notional or contractual amount $ 1,003,554 $ 1,101,807
Asset derivatives, Fair value 13,657 21,187
Liability derivatives, Fair value 13,687 21,183
Interest rate swap contracts    
Derivative Financial Instruments    
Asset derivatives, Fair value 13,432 24,436
Interest rate swap contracts | Non-hedging derivative financial instruments    
Derivative Financial Instruments    
Notional or contractual amount 990,000 1,064,721
Asset derivatives, Fair value 13,432 20,735
Liability derivatives, Fair value 13,686 21,172
Loan commitments | Non-hedging derivative financial instruments    
Derivative Financial Instruments    
Notional or contractual amount 6,304 15,086
Asset derivatives, Fair value 225 452
Liability derivatives, Fair value 0 0
Forward contracts - mortgage loan | Non-hedging derivative financial instruments    
Derivative Financial Instruments    
Notional or contractual amount 7,250 22,000
Asset derivatives, Fair value 0 0
Liability derivatives, Fair value $ 1 $ 11