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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 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Derivative [Line Items]        
Gain (loss) included in interest expense on deposits $ 38,466 $ 21,679 $ 76,664 $ 41,585
Gain (loss) included in interest expense on FHLB borrowings 6,455 1,032 12,405 4,173
Gain (loss) included in interest expense on other borrowings 3,550 8,155 6,681 10,573
Total interest expense 50,578 32,960 99,988 60,455
Gain (loss) included in interest income on tax-exempt investment securities 10,710 13,720 21,798 27,636
Gain (loss) included in interest income on MBS 11,084 3,830 21,203 8,159
Loans 69,684 58,684 137,895 113,460
Gain (loss) included in interest income on loans 1,765 1,766 3,528 3,598
Other noninterest income 1,439 1,651 2,498 3,049
Interest Rate Swap | Derivatives designated as non-hedging instruments        
Derivative [Line Items]        
Other noninterest income 53 0 53 160
Interest Rate Swap | Cash Flow Hedging | Derivatives designated as hedging instruments        
Derivative [Line Items]        
Gain (loss) included in interest expense on deposits 3,738 3,390 7,849 6,461
Gain (loss) included in interest expense on FHLB borrowings 2,044 1,868 4,575 3,769
Gain (loss) included in interest expense on other borrowings 0 796 0 932
Total interest expense 5,782 6,054 12,424 11,162
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 2,481 3,228 5,103 5,678
Gain (loss) included in interest income on MBS 266 0 266 0
Loans $ 87 $ 0 $ 87 $ 0