Investments, Fair Value Measured on a Recurring Basis (Details) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities		$ 207,138	$ 215,108
Equity securities		23,705	23,355
Recurring [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities		207,138	215,108
Equity securities		23,705	23,355
Cash equivalents		8,653	13,855
Assets at fair value		239,496	252,318
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		19,155	17,973
Cash equivalents		8,653	13,855
Assets at fair value		27,808	31,828
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities		206,120	213,739
Equity securities	[1]	4,550	5,382
Cash equivalents		0	0
Assets at fair value		210,670	219,121
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial instruments carried at fair value measured on a recurring basis [Abstract]
Fixed maturities	[1]	1,018	1,369
Equity securities		0	0
Cash equivalents		0	0
Assets at fair value		$ 1,018	$ 1,369

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