Investments - Amortized Cost, Fair Value and Unrealized Gains and (Losses) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Net Investment Income [Line Items]
Amortized Cost	$ 138,755	$ 143,036
Gross unrealized, gains	348	791
Gross unrealized, losses	(4,987)	(4,651)
Fair Value	134,116	139,176
U.S. Treasuries
Net Investment Income [Line Items]
Amortized Cost	36,212	43,931
Gross unrealized, gains	21	95
Gross unrealized, losses	(414)	(330)
Fair Value	35,819	43,696
Obligations of states, municipalities and political subdivisions
Net Investment Income [Line Items]
Amortized Cost	19,481	18,281
Gross unrealized, gains	52	100
Gross unrealized, losses	(988)	(961)
Fair Value	18,545	17,420
Corporate bonds
Net Investment Income [Line Items]
Amortized Cost	54,417	51,678
Gross unrealized, gains	209	430
Gross unrealized, losses	(2,213)	(2,067)
Fair Value	52,413	50,041
Residential and commercial mortgage-backed securities
Net Investment Income [Line Items]
Amortized Cost	25,217	25,452
Gross unrealized, gains	54	153
Gross unrealized, losses	(1,098)	(1,004)
Fair Value	24,173	24,601
Other loan-backed and structured securities
Net Investment Income [Line Items]
Amortized Cost	3,428	3,694
Gross unrealized, gains	12	13
Gross unrealized, losses	(274)	(289)
Fair Value	$ 3,166	$ 3,418