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Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
As of December 31, 2022
Number of InstrumentsNotional AmountWeighted Average Maturity (In Years)Fair Value
(Dollars in Thousands)
Included in Derivative assets
Derivatives not designated as hedging instruments
Interest rate swap agreements on loans with commercial loan customers$65,352 4.83$1,010 
Interest rate swap agreements on loans with third-party counter parties84 744,233 7.3760,409 
Derivatives designated as hedging instruments
Interest rate swap related to AFS securities11 $12,500 9.28$602 
Interest rate swap related to FHLB borrowings11 116,400 2.886,560 
Included in Derivative liabilities
Derivatives not designated as hedging instruments
Interest rate swap agreements on loans with commercial loan customers82 $678,881 7.61$61,419 
As of December 31, 2021
Number of InstrumentsNotional AmountWeighted Average Maturity (In Years)Fair Value
(Dollars in Thousands)
Included in Derivative assets
Derivatives not designated as hedging instruments
Interest rate swap agreements on loans with commercial loan customers41 $411,913 8.18$26,343 
Included in Derivative liabilities
Derivatives not designated as hedging instruments
Interest rate swap agreements on loans with commercial loan customers39 $228,676 8.70$6,595 
Interest rate swap agreements on loans with third-party counter parties80 640,589 8.3719,748 
Derivatives designated as hedging instruments
Interest rate swap related to FHLB borrowings10 $106,000 3.17$1,940