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Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Amortization of unrealized gains and losses $ 2,023 $ 1,992
Tax benefit (expense) (4,622) (4,543)
Realized net gain (loss) on sale of securities (18) (2,146)
Total reclassifications for the period, net of tax 3,502 630
Unrealized gains (losses)    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Reclassified from accumulated other comprehensive income (2,041) (4,138)
Realized net gain (loss) on interest rate swap derivatives    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Reclassified from accumulated other comprehensive income 6,642 5,108
Net actuarial loss    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Reclassified from accumulated other comprehensive income [1] (167) (173)
Amortization of pension plan    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Reclassified from accumulated other comprehensive income (167) (173)
Tax benefit 34 36
Total reclassifications for the period, net of tax (133) (137)
Unrealized gains and losses on securities transferred | Reclassification out of accumulated other comprehensive income | Unrealized gains (losses)    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Amortization of unrealized gains and losses [2] (2,023) (1,992)
Tax benefit (expense) 425 418
Net of tax (1,598) (1,574)
Unrealized gains and losses on available for sale securities | Reclassification out of accumulated other comprehensive income | Unrealized gains (losses)    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Tax benefit (expense) 4 451
Net of tax (14) (1,695)
Realized net gain (loss) on sale of securities [3] (18) (2,146)
Interest rate swap derivatives | Reclassification out of accumulated other comprehensive income | Realized net gain (loss) on interest rate swap derivatives    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Tax benefit (expense) (1,395) (1,072)
Net of tax 5,247 4,036
Realized net (loss) gain on interest rate swap derivatives [4] $ 6,642 $ 5,108
[1] These AOCI components are included in the computation of net periodic pension cost (income) presented in “Note 8 – Employee Benefit Plans.”
[2] Included in interest income on the consolidated statements of income.
[3] Listed as net gain (loss) on sale of securities AFS on the consolidated statements of income.
[4] Included in interest expense for FHLB borrowings, other borrowings and deposits on the consolidated statements of income.