Fair Values of Financial Instruments, Measured on a Recurring Basis (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities		$ 217,149	$ 210,386
Equity securities		25,792	20,758
Recurring [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities		217,149	210,386
Equity securities		25,792	20,758
Cash equivalents		6,724	8,250
Assets at fair value		249,665	239,394
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		10,286	11,413
Equity securities		21,240	16,398
Cash equivalents		6,724	8,250
Assets at fair value		38,250	36,061
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities		205,748	197,907
Equity securities	[1]	4,552	4,360
Cash equivalents		0	0
Assets at fair value		210,300	202,267
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	[1]	1,115	1,066
Equity securities		0	0
Cash equivalents		0	0
Assets at fair value		$ 1,115	$ 1,066

[1] All underlying securities are financial services industry related.