Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrealized gains and losses		$ 1,989	$ 1,310	$ 3,981	$ 1,553
Tax benefit (expense)		(4,568)	(3,297)	(9,111)	(6,443)
Realized net gain (loss) on sale of securities		(3,455)	(2,177)	(5,601)	(3,720)
Total reclassifications for the period, net of tax		319	(3,217)	949	(5,836)
Unrealized gains (losses)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassified from accumulated other comprehensive income		(5,444)	(3,487)	(9,582)	(5,273)
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		6,054	(344)	11,162	(1,666)
Net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassified from accumulated other comprehensive income	[1]	(205)	(241)	(378)	(447)
Amortization of pension plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassified from accumulated other comprehensive income		(205)	(241)	(378)	(447)
Tax benefit		43	51	79	93
Total reclassifications for the period, net of tax		(162)	(190)	(299)	(354)
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]	(1,989)	(1,310)	(3,981)	(1,553)
Tax benefit (expense)		418	275	836	326
Net of tax		(1,571)	(1,035)	(3,145)	(1,227)
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)		725	457	1,176	781
Net of tax		(2,730)	(1,720)	(4,425)	(2,939)
Realized net gain (loss) on sale of securities	[3]	(3,455)	(2,177)	(5,601)	(3,720)
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)		(1,272)	72	(2,344)	350
Net of tax		4,782	(272)	8,818	(1,316)
Realized net (loss) gain on interest rate swap derivatives	[4]	$ 6,054	$ (344)	$ 11,162	$ (1,666)

[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.