Fair Values of Financial Instruments, Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	$ 236,187	$ 232,472
Equity securities	15,965	22,922
Recurring [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	236,187	232,472
Equity securities	15,965	22,922
Cash equivalents	8,429	7,173
Assets at fair value	260,581	262,567
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	250	0
Equity securities	15,822	22,922
Cash equivalents	8,429	7,173
Assets at fair value	24,501	30,095
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	235,937	232,472
Equity securities	0	0
Cash equivalents	0	0
Assets at fair value	235,937	232,472
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	143	0
Cash equivalents	0	0
Assets at fair value	$ 143	$ 0