Investments - Amortized Cost, Fair Value and Unrealized Gains and (Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Net Investment Income [Line Items]
Amortized Cost	$ 140,435	$ 143,036
Gross unrealized, gains	202	791
Gross unrealized, losses	(5,076)	(4,651)
Fair Value	135,561	139,176
U.S. Treasuries
Net Investment Income [Line Items]
Amortized Cost	36,683	43,931
Gross unrealized, gains	17	95
Gross unrealized, losses	(436)	(330)
Fair Value	36,264	43,696
Obligations of states, municipalities and political subdivisions
Net Investment Income [Line Items]
Amortized Cost	18,689	18,281
Gross unrealized, gains	15	100
Gross unrealized, losses	(983)	(961)
Fair Value	17,721	17,420
Corporate bonds
Net Investment Income [Line Items]
Amortized Cost	53,327	51,678
Gross unrealized, gains	118	430
Gross unrealized, losses	(2,283)	(2,067)
Fair Value	51,162	50,041
Residential and commercial mortgage-backed securities
Net Investment Income [Line Items]
Amortized Cost	27,470	25,452
Gross unrealized, gains	45	153
Gross unrealized, losses	(1,108)	(1,004)
Fair Value	26,407	24,601
Other loan-backed and structured securities
Net Investment Income [Line Items]
Amortized Cost	4,266	3,694
Gross unrealized, gains	7	13
Gross unrealized, losses	(266)	(289)
Fair Value	$ 4,007	$ 3,418