Investments - Amortized Cost, Fair Value and Unrealized Gains and (Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Net Investment Income [Line Items]
Amortized Cost	$ 143,036	$ 97,812
Gross Unrealized, Gains	791	56
Gross Unrealized, Losses	(4,651)	(6,227)
Fair Value	139,176	91,641
U.S. Treasuries
Net Investment Income [Line Items]
Amortized Cost	43,931	35,637
Gross Unrealized, Gains	95	5
Gross Unrealized, Losses	(330)	(320)
Fair Value	43,696	35,322
Obligations of states, municipalities and political subdivisions
Net Investment Income [Line Items]
Amortized Cost	18,281	11,549
Gross Unrealized, Gains	100	2
Gross Unrealized, Losses	(961)	(1,326)
Fair Value	17,420	10,225
Corporate bonds
Net Investment Income [Line Items]
Amortized Cost	51,678	31,032
Gross Unrealized, Gains	430	32
Gross Unrealized, Losses	(2,067)	(2,837)
Fair Value	50,041	28,227
Residential and commercial mortgage-backed securities
Net Investment Income [Line Items]
Amortized Cost	25,452	12,790
Gross Unrealized, Gains	153	11
Gross Unrealized, Losses	(1,004)	(1,268)
Fair Value	24,601	11,533
Other loan-backed and structured securities
Net Investment Income [Line Items]
Amortized Cost	3,694	6,804
Gross Unrealized, Gains	13	6
Gross Unrealized, Losses	(289)	(476)
Fair Value	$ 3,418	$ 6,334