Investments - Securities with Gross Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Net Investment Income [Line Items]
Less Than Twelve Months, Gross Unrealized Loss	$ (3,693)	$ (3,725)
Less Than Twelve Months, Fair Value	53,357	44,735
Twelve Months or Greater, Gross Unrealized Loss	(958)	(2,502)
Twelve Months or Greater, Fair Value	9,955	29,702
Total, Gross Unrealized Loss	(4,651)	(6,227)
Total, Fair Value	63,312	74,437
U.S. Treasuries
Net Investment Income [Line Items]
Less Than Twelve Months, Gross Unrealized Loss	(280)	(127)
Less Than Twelve Months, Fair Value	12,345	10,748
Twelve Months or Greater, Gross Unrealized Loss	(50)	(193)
Twelve Months or Greater, Fair Value	515	9,824
Total, Gross Unrealized Loss	(330)	(320)
Total, Fair Value	12,860	20,572
Obligations of states, municipalities and political subdivisions
Net Investment Income [Line Items]
Less Than Twelve Months, Gross Unrealized Loss	(813)	(929)
Less Than Twelve Months, Fair Value	8,445	6,258
Twelve Months or Greater, Gross Unrealized Loss	(148)	(397)
Twelve Months or Greater, Fair Value	1,639	3,504
Total, Gross Unrealized Loss	(961)	(1,326)
Total, Fair Value	10,084	9,762
Corporate bonds
Net Investment Income [Line Items]
Less Than Twelve Months, Gross Unrealized Loss	(1,698)	(1,623)
Less Than Twelve Months, Fair Value	21,104	16,531
Twelve Months or Greater, Gross Unrealized Loss	(369)	(1,214)
Twelve Months or Greater, Fair Value	4,677	10,328
Total, Gross Unrealized Loss	(2,067)	(2,837)
Total, Fair Value	25,781	26,859
Residential and commercial mortgage-backed securities
Net Investment Income [Line Items]
Less Than Twelve Months, Gross Unrealized Loss	(621)	(687)
Less Than Twelve Months, Fair Value	8,673	6,565
Twelve Months or Greater, Gross Unrealized Loss	(383)	(581)
Twelve Months or Greater, Fair Value	3,072	4,952
Total, Gross Unrealized Loss	(1,004)	(1,268)
Total, Fair Value	11,745	11,517
Other loan-backed and structured securities
Net Investment Income [Line Items]
Less Than Twelve Months, Gross Unrealized Loss	(281)	(359)
Less Than Twelve Months, Fair Value	2,790	4,633
Twelve Months or Greater, Gross Unrealized Loss	(8)	(117)
Twelve Months or Greater, Fair Value	52	1,094
Total, Gross Unrealized Loss	(289)	(476)
Total, Fair Value	$ 2,842	$ 5,727