Fair Value - Level 3 Assets (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	$ 33,250	$ 42,261	$ 37,331	$ 24,368
Included in earnings	(205)	(57)	(155)	(559)
Included in other comprehensive income (loss)	144	715	515	931
Purchases	1,250	1,967	10,532	10,630
Sales	(1,599)	(420)	(5,492)	(1,372)
Transfers into Level 3	7,754	2,454	23,243	24,470
Transfers out of Level 3	(6,599)	(20,560)	(31,979)	(32,108)
Ending balance	33,995	26,360	33,995	26,360
Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	22,610	33,763	30,357	17,034
Included in earnings	(205)	(574)	(801)	(1,223)
Included in other comprehensive income (loss)	144	715	515	931
Purchases	0	1,967	5,782	8,611
Sales	(1,599)	(420)	(5,492)	(1,288)
Transfers into Level 3	7,754	2,454	23,225	23,926
Transfers out of Level 3	(6,599)	(18,504)	(31,481)	(28,590)
Ending balance	22,105	19,401	22,105	19,401
Available-for-sale securities | Corporate debt securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	6,176	8,543	6,268	4,506
Included in earnings	21	(166)	51	(141)
Included in other comprehensive income (loss)	45	45	12	66
Purchases	0	865	3,085	5,704
Sales	(1,252)	(392)	(2,044)	(1,215)
Transfers into Level 3	1,139	1,142	4,615	4,966
Transfers out of Level 3	(3,074)	(6,396)	(8,932)	(10,245)
Ending balance	3,055	3,641	3,055	3,641
Available-for-sale securities | Collateralized debt obligations
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance			0
Included in earnings			(4)
Included in other comprehensive income (loss)			0
Purchases			700
Sales			(696)
Transfers into Level 3			0
Transfers out of Level 3			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	16,434	25,220	24,089	10,994
Included in earnings	(226)	(408)	(848)	(1,077)
Included in other comprehensive income (loss)	99	670	503	889
Purchases	0	1,102	1,997	2,907
Sales	(347)	(28)	(2,734)	(33)
Transfers into Level 3	5,331	1,312	16,403	18,960
Transfers out of Level 3	(3,525)	(12,108)	(21,644)	(16,880)
Ending balance	17,766	15,760	17,766	15,760
Available-for-sale securities | Residential mortgage-backed securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	0		0	1,534
Included in earnings	0		0	(5)
Included in other comprehensive income (loss)	0		0	(24)
Purchases	0		0	0
Sales	0		(18)	(40)
Transfers into Level 3	1,284		2,207	0
Transfers out of Level 3	0		(905)	(1,465)
Ending balance	1,284	0	1,284	0
Equity securities | Equity securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	10,640	8,498	6,974	7,334
Included in earnings	0	517	646	664
Included in other comprehensive income (loss)	0	0	0	0
Purchases	1,250	0	4,750	2,019
Sales	0	0	0	(84)
Transfers into Level 3	0	0	18	544
Transfers out of Level 3	0	(2,056)	(498)	(3,518)
Ending balance	$ 11,890	$ 6,959	$ 11,890	$ 6,959