Fair Value - Level 3 Assets (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	$ 39,665	$ 25,424	$ 39,819	$ 37,331
Included in earnings	113	(241)	(179)	50
Included in other comprehensive income (loss)	249	130	(41)	371
Purchases	3,314	5,465	4,266	9,282
Sales	(4,654)	(2,029)	(5,572)	(3,893)
Transfers into Level 3	4,341	12,096	12,818	15,489
Transfers out of Level 3	(12,177)	(7,595)	(20,260)	(25,380)
Ending balance	30,851	33,250	30,851	33,250
Available-for-sale securities:
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	27,366	16,777	27,754	30,357
Included in earnings	(627)	(232)	(997)	(596)
Included in other comprehensive income (loss)	249	130	(41)	371
Purchases	14	2,965	816	5,782
Sales	(4,610)	(2,029)	(5,528)	(3,893)
Transfers into Level 3	4,320	12,096	12,791	15,471
Transfers out of Level 3	(12,177)	(7,097)	(20,260)	(24,882)
Ending balance	14,535	22,610	14,535	22,610
Available-for-sale securities: | Corporate debt securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	3,758	6,030	3,939	6,268
Included in earnings	(112)	12	(99)	30
Included in other comprehensive income (loss)	119	21	(20)	(33)
Purchases	14	968	816	3,085
Sales	(3,513)	(217)	(4,214)	(792)
Transfers into Level 3	212	2,377	1,023	3,476
Transfers out of Level 3	0	(3,015)	(967)	(5,858)
Ending balance	478	6,176	478	6,176
Available-for-sale securities: | Collateralized debt obligations
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance		695		0
Included in earnings		(4)		(4)
Included in other comprehensive income (loss)		5		0
Purchases		0		700
Sales		(696)		(696)
Transfers into Level 3		0		0
Transfers out of Level 3		0		0
Ending balance		0		0
Available-for-sale securities: | Commercial mortgage-backed securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	22,701	9,129	23,021	24,089
Included in earnings	(515)	(240)	(899)	(622)
Included in other comprehensive income (loss)	134	104	(6)	404
Purchases	0	1,997	0	1,997
Sales	(1,074)	(1,098)	(1,276)	(2,387)
Transfers into Level 3	3,013	9,719	10,535	11,072
Transfers out of Level 3	(11,297)	(3,177)	(18,413)	(18,119)
Ending balance	12,962	16,434	12,962	16,434
Available-for-sale securities: | Residential mortgage-backed securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	907	923	794	0
Included in earnings	0	0	1	0
Included in other comprehensive income (loss)	(4)	0	(15)	0
Purchases	0	0	0	0
Sales	(23)	(18)	(38)	(18)
Transfers into Level 3	1,095	0	1,233	923
Transfers out of Level 3	(880)	(905)	(880)	(905)
Ending balance	1,095	0	1,095	0
Equity securities | Equity securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	12,299	8,647	12,065	6,974
Included in earnings	740	(9)	818	646
Included in other comprehensive income (loss)	0	0	0	0
Purchases	3,300	2,500	3,450	3,500
Sales	(44)	0	(44)	0
Transfers into Level 3	21	0	27	18
Transfers out of Level 3	0	(498)	0	(498)
Ending balance	$ 16,316	$ 10,640	$ 16,316	$ 10,640