Investments - Amortized Cost, Fair Value and Unrealized Gains and (Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Net Investment Income [Line Items]
Amortized Cost	$ 98,806	$ 97,812
Gross Unrealized, Gains	63	56
Gross Unrealized, Losses	(6,139)	(6,227)
Fair value	92,730	91,641
U.S. Treasuries
Net Investment Income [Line Items]
Amortized Cost	28,407	35,637
Gross Unrealized, Gains	1	5
Gross Unrealized, Losses	(361)	(320)
Fair value	28,047	35,322
Obligations of states, municipalities and political subdivisions
Net Investment Income [Line Items]
Amortized Cost	11,846	11,549
Gross Unrealized, Gains	4	2
Gross Unrealized, Losses	(1,178)	(1,326)
Fair value	10,672	10,225
Corporate bonds.
Net Investment Income [Line Items]
Amortized Cost	35,236	31,032
Gross Unrealized, Gains	38	32
Gross Unrealized, Losses	(2,879)	(2,837)
Fair value	32,395	28,227
Residential and commercial mortgage-backed securities
Net Investment Income [Line Items]
Amortized Cost	17,607	12,790
Gross Unrealized, Gains	16	11
Gross Unrealized, Losses	(1,328)	(1,268)
Fair value	16,295	11,533
Other loan-backed and structured securities
Net Investment Income [Line Items]
Amortized Cost	5,710	6,804
Gross Unrealized, Gains	4	6
Gross Unrealized, Losses	(393)	(476)
Fair value	$ 5,321	$ 6,334