Fair Value - Level 3 Assets (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	$ 42,261	$ 16,398	$ 24,368	$ 22,559
Included in earnings	(57)	(139)	(559)	(525)
Included in other comprehensive income (loss)	715	67	931	385
Purchases	1,967	2,661	10,630	6,606
Sales	(420)	(884)	(1,372)	(1,922)
Transfers into Level 3	2,454	2,208	24,470	5,860
Transfers out of Level 3	(20,560)	(4,838)	(32,108)	(17,490)
Ending balance	26,360	15,473	26,360	15,473
Available-for-sale securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	33,763	11,668	17,034	18,780
Included in earnings	(574)	(172)	(1,223)	(551)
Included in other comprehensive income (loss)	715	67	931	385
Purchases	1,967	1,661	8,611	4,648
Sales	(420)	(884)	(1,288)	(1,922)
Transfers into Level 3	2,454	2,208	23,926	5,860
Transfers out of Level 3	(18,504)	(3,031)	(28,590)	(15,683)
Ending balance	19,401	11,517	19,401	11,517
Available-for-sale securities | Corporate debt securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	8,543	5,123	4,506	3,686
Included in earnings	(166)	10	(141)	(4)
Included in other comprehensive income (loss)	45	123	66	245
Purchases	865	1,661	5,704	3,193
Sales	(392)	(511)	(1,215)	(1,256)
Transfers into Level 3	1,142	730	4,966	3,883
Transfers out of Level 3	(6,396)	(3,031)	(10,245)	(5,642)
Ending balance	3,641	4,105	3,641	4,105
Available-for-sale securities | Commercial mortgage-backed securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	25,220	6,533	10,994	10,910
Included in earnings	(408)	(182)	(1,077)	(542)
Included in other comprehensive income (loss)	670	(56)	889	44
Purchases	1,102	0	2,907	1,455
Sales	(28)	(366)	(33)	(551)
Transfers into Level 3	1,312	1,478	18,960	1,944
Transfers out of Level 3	(12,108)	0	(16,880)	(5,853)
Ending balance	15,760	7,407	15,760	7,407
Available-for-sale securities | Residential mortgage- backed securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance		12	1,534	4,184
Included in earnings		0	(5)	(5)
Included in other comprehensive income (loss)		0	(24)	96
Purchases		0	0	0
Sales		(7)	(40)	(115)
Transfers into Level 3		0	0	33
Transfers out of Level 3		0	(1,465)	(4,188)
Ending balance	0	5	0	5
Equity securities | Equity securities
Roll forward of level 3 fair value measurements on a recurring basis
Beginning balance	8,498	4,730	7,334	3,779
Included in earnings	517	33	664	26
Included in other comprehensive income (loss)	0	0	0	0
Purchases	0	1,000	2,019	1,958
Sales	0	0	(84)	0
Transfers into Level 3	0	0	544	0
Transfers out of Level 3	(2,056)	(1,807)	(3,518)	(1,807)
Ending balance	$ 6,959	$ 3,956	$ 6,959	$ 3,956