Investments (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
The scheduled maturities of the Company's fixed maturity securities based on their fair values
Securities with Unrealized Gains, One year or less	$ 20,002	$ 15,801
Securities with Unrealized Gains, After one through five years	51,538	61,511
Securities with Unrealized Gains, After five through ten years	41,685	42,997
Securities with Unrealized Gains, After ten years	10,598	7,860
Securities with Unrealized Gains, No single maturity date	24,992	26,623
Securities with Unrealized Gains, Total	148,815	154,792
Securities with Unrealized Losses, One year or less		2,506
Securities with Unrealized Losses, After one through five years	1,003
Securities with Unrealized Losses, After five through ten years		689
Securities with Unrealized Losses, After ten years		3,106
Securities with Unrealized Losses, No single maturity date	1,933	2,168
Securities with Unrealized Losses, Total	2,936	8,469
Securities with No Unrealized Gains or Losses, One year or less	2,155	955
Securities with No Unrealized Gains or Losses, No single maturity date	78	1,065
Securities with No Unrealized Gains or Losses, Total	2,233	2,020
All Fixed Maturity Securities, One year or less	22,157	19,262
All Fixed Maturity Securities, After one through five years	52,541	61,511
All Fixed Maturity Securities, After five through ten years	41,685	43,686
All Fixed Maturity Securities, After ten years	10,598	10,966
All Fixed Maturity Securities, No single maturity date	27,003	29,856
All Fixed Maturity Securities, Total	$ 153,984	$ 165,281