Investments by Maturity (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized Cost	$ 5,456	$ 5,557
Due in one year or less, Fair Value	5,512	5,608
Due after one year through five years, Amortized Cost Basis	65,641	58,378
Due after one year through five years, Fair Value	67,823	60,323
Due after five years through ten years, Amortized Cost Basis	24,490	24,983
Due after five years through ten years, Fair Value	25,197	25,900
Due after ten years, Amortized Cost Basis	18,853	17,769
Due after ten years, Fair Value	19,313	18,396
Total Fixed Maturity Securities, Amortized Cost Basis	114,695	107,095
Fixed Maturity Securities	118,102	110,641
Mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	195	285
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	196	289
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	60	123
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 61	$ 125