Investments - Schedule of Unrealized Loss on Investments (Details) $ in Thousands		Sep. 30, 2026 USD ($) Security	Dec. 31, 2025 USD ($) Security
U.S. Government and Agency Securities
Twelve Months or More
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | Security	[1]	7	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 824	$ 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 50,480	$ 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	[1]	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 0	$ 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer		$ 0	$ 0
Corporate Securities
Twelve Months or More
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | Security	[1]	98	27
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 932	$ 57
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 36,341	$ 11,165
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	[1]	73	78
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 4,646	$ 3,703
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer		$ 41,155	$ 46,381
Mortgage-backed securities
Twelve Months or More
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | Security	[1]	26	2
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 157	$ 5
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 5,780	$ 263
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	[1]	55	54
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 4,575	$ 3,842
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer		$ 22,825	$ 26,094
States, Municipalities and Political Subdivisions
Twelve Months or More
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | Security	[1]	70	13
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 684	$ 24
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 17,428	$ 4,528
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	[1]	22	24
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 1,382	$ 1,140
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer		$ 13,503	$ 14,992
Asset-backed Securities
Twelve Months or More
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | Security	[1]	21	3
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 38	$ 2
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 4,513	$ 591
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	[1]	20	21
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 797	$ 636
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer		$ 5,825	$ 6,715
Public Utilities
Twelve Months or More
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | Security	[1]	14	4
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 154	$ 5
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 5,413	$ 1,772
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	[1]	5	6
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 187	$ 174
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer		$ 2,429	$ 3,472
Foreign Government
Twelve Months or More
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | Security	[1]	3	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 8	$ 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 576	$ 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	[1]	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 0	$ 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer		$ 0	$ 0
Fixed Maturities
Twelve Months or More
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | Security	[1]	239	49
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 2,797	$ 93
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 120,531	$ 18,319
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	[1]	175	183
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 11,587	$ 9,495
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer		$ 85,737	$ 97,654

[1] This amount represents the actual number of discrete securities, not the number of shares or units of those securities. The numbers are not presented in thousands.