Fair Values of Financial Instruments, Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	$ 218,420	$ 218,219
Equity securities	9,303	9,413
Recurring [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	218,420	218,219
Equity securities	9,303	9,413
Cash equivalents	13,309	14,834
Assets at fair value	241,032	242,466
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	0	0
Equity securities	9,114	9,228
Cash equivalents	13,309	14,834
Assets at fair value	22,423	24,062
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	218,420	218,219
Equity securities	0	0
Cash equivalents	0	0
Assets at fair value	218,420	218,219
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	0	0
Equity securities	189	185
Cash equivalents	0	0
Assets at fair value	$ 189	$ 185