Other Comprehensive Income (Loss) - Components of OCI (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Before Tax
Total other comprehensive income (loss)	$ (7,648)	$ 13,976	$ (21,861)	$ 54,111
Tax Effect
Total	2,138	(7,500)	6,111	(22,526)
After Tax
Total other comprehensive (loss) income	(5,510)	6,476	(15,750)	31,585
Unrealized gains and losses on available for sale debt securities:
Before Tax
Net unrealized gains (losses) arising during the period	(11,894)	17,700	(29,506)	60,175
Reclassification adjustment for gains included in net income	806	0	806	(87)
Total other comprehensive income (loss)	(11,088)	17,700	(28,700)	60,088
Tax Effect
Net unrealized gains (losses) arising during the period	3,324	(8,555)	8,247	(24,244)
Reclassification adjustment for (gains) losses on securities sales included in net income	(225)	0	(225)	25
Total	3,099	(8,555)	8,022	(24,219)
After Tax
Net unrealized gains (losses) arising during the period	(8,570)	9,145	(21,259)	35,931
Reclassification adjustment for (gains) losses on securities sales included in net income	581	0	581	(62)
Total other comprehensive (loss) income	(7,989)	9,145	(20,678)	35,869
Unrealized gains and losses on derivatives (cash flow hedges):
Before Tax
Net unrealized gains (losses) arising during the period	3,673	(976)	7,189	(829)
Reclassification adjustment for gains included in net income	(46)	(2,289)	(139)	(4,229)
Total other comprehensive income (loss)	3,627	(3,265)	7,050	(5,058)
Tax Effect
Net unrealized gains (losses) arising during the period	(1,026)	277	(2,009)	235
Reclassification adjustment for (gains) losses on securities sales included in net income	13	648	39	1,198
Total	(1,013)	925	(1,970)	1,433
After Tax
Net unrealized gains (losses) arising during the period	2,647	(699)	5,180	(594)
Reclassification adjustment for (gains) losses on securities sales included in net income	(33)	(1,641)	(100)	(3,031)
Total other comprehensive (loss) income	2,614	(2,340)	5,080	(3,625)
Post- Retirement Obligations
Before Tax
Total other comprehensive income (loss)	(187)	(459)	(211)	(919)
Tax Effect
Total	52	130	59	260
After Tax
Total other comprehensive (loss) income	$ (135)	$ (329)	$ (152)	$ (659)

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