Investments - Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Available for sale, fair value
Less than 12 Months	$ 480,693	$ 121,362
12 Months or More	236,741	441,858
Total	717,434	563,220
Available for sale, gross unrealized losses
Less than 12 Months	(7,353)	(1,667)
12 Months or More	(31,331)	(40,886)
Total	(38,684)	(42,553)
Held-to-maturity, fair value
Less than 12 Months	2,144	0
12 Months or More	36,573	41,017
Total	38,717	41,017
Held-to-maturity, gross unrealized losses
Less than 12 Months	(2)	0
12 Months or More	(434)	(1,969)
Total	(436)	(1,969)
Available-for-sale and held-to-maturity, fair value
Less than 12 Months	482,837	121,362
12 Months or More	273,314	482,875
Total	756,151	604,237
Available-for-sale and held-to-maturity, gross unrealized losses
Less than 12 Months	(7,355)	(1,667)
12 Months or More	(31,765)	(42,855)
Total	(39,120)	(44,522)
U.S. government securities
Available for sale, fair value
Less than 12 Months	15,938	7,342
12 Months or More	2,297	25,604
Total	18,235	32,946
Available for sale, gross unrealized losses
Less than 12 Months	(34)	(25)
12 Months or More	(92)	(696)
Total	(126)	(721)
Corporate securities and miscellaneous
Available for sale, fair value
Less than 12 Months	136,888	26,742
12 Months or More	81,232	174,947
Total	218,120	201,689
Available for sale, gross unrealized losses
Less than 12 Months	(2,060)	(570)
12 Months or More	(11,228)	(15,191)
Total	(13,288)	(15,761)
Municipal securities
Available for sale, fair value
Less than 12 Months	41,930	16,815
12 Months or More	27,687	47,269
Total	69,617	64,084
Available for sale, gross unrealized losses
Less than 12 Months	(1,046)	(290)
12 Months or More	(4,320)	(5,853)
Total	(5,366)	(6,143)
Residential mortgage-backed securities
Available for sale, fair value
Less than 12 Months	201,407	37,634
12 Months or More	82,496	103,495
Total	283,903	141,129
Available for sale, gross unrealized losses
Less than 12 Months	(3,366)	(602)
12 Months or More	(13,261)	(13,896)
Total	(16,627)	(14,498)
Commercial mortgage-backed securities
Available for sale, fair value
Less than 12 Months	9,411	4,942
12 Months or More	13,178	15,290
Total	22,589	20,232
Available for sale, gross unrealized losses
Less than 12 Months	(126)	(74)
12 Months or More	(1,317)	(1,852)
Total	(1,443)	(1,926)
Other asset-backed securities
Available for sale, fair value
Less than 12 Months	75,119	27,887
12 Months or More	29,851	75,253
Total	104,970	103,140
Available for sale, gross unrealized losses
Less than 12 Months	(721)	(106)
12 Months or More	(1,113)	(3,398)
Total	(1,834)	(3,504)
Held-to-maturity, fair value
Less than 12 Months	2,144	0
12 Months or More	36,573	41,017
Total	38,717	41,017
Held-to-maturity, gross unrealized losses
Less than 12 Months	(2)	0
12 Months or More	(434)	(1,969)
Total	$ (436)	$ (1,969)

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