Investments (Details 4) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Amortized cost and fair value of fixed maturities available for sale by contractual maturity
Fixed Maturities Securities Available for Sale, Due in one year or less, Amortized cost	$ 5,999
Fixed Maturities Securities Available for Sale, Due after one year through five years, Amortized cost	4,143
Fixed Maturities Securities Available for Sale, Due after five years through ten years, Amortized cost	3,826
Fixed Maturities Securities Available for Sale, Due after ten years, Amortized cost
Fixed Maturities Securities Available for Sale, Amortized cost, Total	13,968
Fixed Maturities Securities Available for Sale, Due in one year or less, Fair Value	5,990
Fixed Maturities Securities Available for Sale, Due after one year through five years, Fair Value	4,143
Fixed Maturities Securities Available for Sale, Due after five years through ten years, Fair Value	3,835
Fixed Maturities Securities Available for Sale, Due after ten years, Fair Value
Fixed Maturities Securities Available for Sale, Fair Value, Total	$ 13,968

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