Fair Values of Financial Instruments - Financial Instruments Carried at Fair Value Measured on a Recurring Basis (Details) - Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Fair Values of Financial Instruments [Abstract]
Fixed maturities	$ 235,469	$ 212,612
Equity securities	10,432	7,900
Cash equivalents	17,903	14,948
Assets at fair value	263,804	235,460
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Values of Financial Instruments [Abstract]
Fixed maturities	0	0
Equity securities	10,239	7,711
Cash equivalents	17,903	14,948
Assets at fair value	28,142	22,659
Significant Other Observable Inputs (Level 2) [Member]
Fair Values of Financial Instruments [Abstract]
Fixed maturities	235,469	212,612
Equity securities	0	0
Cash equivalents	0	0
Assets at fair value	235,469	212,612
Significant Unobservable Inputs (Level 3) [Member]
Fair Values of Financial Instruments [Abstract]
Fixed maturities	0	0
Equity securities	193	189
Cash equivalents	0	0
Assets at fair value	$ 193	$ 189