Investment Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of Amortized cost and estimated fair value of fixed-maturity securities by contractual maturity
Amortized Cost, 2012	$ 65,202
Estimated Fair Value, 2012	65,251
Amortized Cost, 2013-2016	164,741
Estimated Fair Value, 2013-2016	170,028
Amortized Cost, 2017-2021	36,474
Estimated Fair Value, 2017-2021	36,961
Amortized Cost, Thereafter	55,165
Estimated Fair Value, Thereafter	55,771
Mortgage-backed securities, Amortized Cost	19,621
Mortgage-backed securities, Estimated Fair Value	19,556
Total fixed-maturity securities, Amortized Cost	341,203	298,978
Total fixed-maturity securities, Estimated Fair Value	$ 347,567	$ 304,045