Fair Values of Financial Instruments, Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	$ 203,068	$ 208,729
Equity securities	8,224	11,562
Recurring [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	203,068	208,729
Equity securities	8,224	11,562
Cash equivalents	14,035	18,861
Assets at fair value	225,327	239,152
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	8,039	11,406
Cash equivalents	14,035	18,861
Assets at fair value	22,074	30,267
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	203,068	208,729
Equity securities	0	0
Cash equivalents	0	0
Assets at fair value	203,068	208,729
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	185	156
Cash equivalents	0	0
Assets at fair value	$ 185	$ 156