Other Comprehensive Income (Loss) - Tax Effects of Components in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Before Tax
Other comprehensive (loss) income	$ 15,045	$ (75,450)
Tax Effect
Other comprehensive (loss) income	(3,607)	21,014
After Tax
Total other comprehensive income (loss)	11,438	(54,436)
Unrealized Gains (Losses) on Debt Securities Available for Sale
Before Tax
Other comprehensive income (loss), before reclassifications	17,541	(80,181)
Other comprehensive (loss) income	16,235	(80,185)
Tax Effect
Other comprehensive income (loss), before reclassifications	(4,472)	22,366
Other comprehensive (loss) income	(4,102)	22,367
After Tax
Other comprehensive income (loss), before reclassifications	13,069	(57,815)
Total other comprehensive income (loss)	12,133	(57,818)
AOCI, Accumulated Gain (Loss), Debt Securities Available-for-sale, Accretion of Unrealized Gains (Losses), Parent
Before Tax
Reclassification from AOCI, current period	(11)	(4)
Tax Effect
Reclassification from AOCI, current period	4	1
After Tax
Reclassification from AOCI, current period	(7)	(3)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Other Reclassifications, Parent
Before Tax
Reclassification from AOCI, current period	(1,295)	0
Tax Effect
Reclassification from AOCI, current period	366	0
After Tax
Reclassification from AOCI, current period	(929)	0
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Before Tax
Other comprehensive income (loss), before reclassifications	(1,203)	4,382
Tax Effect
Other comprehensive income (loss), before reclassifications	338	(1,225)
After Tax
Other comprehensive income (loss), before reclassifications	(865)	3,157
Total other comprehensive income (loss)	(865)	3,157
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Before Tax
Reclassification from AOCI, current period	(14)	(14)
Tax Effect
Reclassification from AOCI, current period	4	3
After Tax
Reclassification from AOCI, current period	(10)	(11)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Before Tax
Reclassification from AOCI, current period	1	(339)
Tax Effect
Reclassification from AOCI, current period	0	95
After Tax
Reclassification from AOCI, current period	1	(244)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Before Tax
Other comprehensive income (loss), before reclassifications	26	706
Other comprehensive (loss) income	13	353
Tax Effect
Other comprehensive income (loss), before reclassifications	153	(226)
Other comprehensive (loss) income	157	(128)
After Tax
Other comprehensive income (loss), before reclassifications	179	480
Total other comprehensive income (loss)	$ 170	$ 225