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Derivative Financial Instruments and Hedging Activities - Derivative Included In The Consolidated Statements Of Income Related To Interest Rate Swap Agreements (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Derivative [Line Items]    
Gain (loss) included in interest expense on deposits $ 38,198 $ 19,906
Gain (loss) included in interest expense on FHLB borrowings 5,950 3,141
Gain (loss) included in interest expense on other borrowings 3,131 2,418
Total interest expense 49,410 27,495
Gain (loss) included in interest income on tax-exempt investment securities 11,088 13,916
Other noninterest income 1,059 1,398
Interest Rate Swap | Derivatives designated as non-hedging instruments    
Derivative [Line Items]    
Other noninterest income 0 160
Interest Rate Swap | Cash Flow Hedging | Derivatives designated as hedging instruments    
Derivative [Line Items]    
Gain (loss) included in interest expense on deposits 4,111 3,071
Gain (loss) included in interest expense on FHLB borrowings 2,531 1,901
Gain (loss) included in interest expense on other borrowings 0 136
Total interest expense 6,642 5,108
Interest Rate Swap | Fair Value Hedging | Derivatives designated as hedging instruments    
Derivative [Line Items]    
Gain (loss) included in interest income on tax-exempt investment securities $ 2,622 $ 2,450