Fair Value Measurements (Details 2) (Level 3 [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation
Beginning balance	$ 46,745	$ 44,882	$ 56,981
Included in earnings	3	7	103
Included in other comprehensive income	316	(13)	1,436
Purchases, issuances, sales and other dispositions:
Purchases
Issuances
Sales
Other dispositions	(916)	(2,542)	(3,177)
Transfers into Level 3		3,814	8,640
Transfers out of Level 3			(19,101)
Ending balance	46,148	46,148	44,882
Net unrealized losses	304	(25)	1,506
Liabilities, Beginning balance	(950)	(187)	(2,799)
Liabilities, Included in earnings	1,371	683	2,500
Liabilities, Included in other comprehensive income
Purchases, issuances, sales and other dispositions:
Liabilities, Purchases
Liabilities, Issuances	141	196	163
Liabilities, Sales
Liabilities, Other dispositions	(284)	(414)	(51)
Liabilities, Transfers into Level 3
Liabilities, Transfers out of Level 3
Liabilities, Ending balance	278	278	(187)
Fixed maturity securities available for sale [Member]
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation
Beginning balance	45,652	43,759	55,801
Included in earnings	3	7	11
Included in other comprehensive income	260	(39)	1,385
Purchases, issuances, sales and other dispositions:
Purchases
Issuances
Sales
Other dispositions	(916)	(2,542)	(2,977)
Transfers into Level 3		3,814	8,640
Transfers out of Level 3			(19,101)
Ending balance	44,999	44,999	43,759
Net unrealized losses	248	(51)	1,401
Equity securities available for sale [Member]
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation
Beginning balance	1,093	1,123	1,180
Included in earnings			92
Included in other comprehensive income	56	26	51
Purchases, issuances, sales and other dispositions:
Purchases
Issuances
Sales
Other dispositions			(200)
Ending balance	1,149	1,149	1,123
Net unrealized losses	$ 56	$ 26	$ 105

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-Paragraph 21

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