Investments by Maturity (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized Cost	$ 5,557	$ 3,890
Due in one year or less, Fair Value	5,608	3,923
Due after one year through five years, Amortized Cost Basis	58,378	51,210
Due after one year through five years, Fair Value	60,323	51,839
Due after five years through ten years, Amortized Cost Basis	24,983	23,623
Due after five years through ten years, Fair Value	25,900	23,973
Due after ten years, Amortized Cost Basis	17,769	11,941
Due after ten years, Fair Value	18,396	12,089
Total Fixed Maturity Securities, Amortized Cost Basis	107,095	92,311
Fixed Maturity Securities	110,641	93,509
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	285	1,272
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	289	1,298
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	123	375
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 125	$ 387