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Significant Accounting Policies Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Change in other policy funds and contract claims     $ 56,568 $ 152,508
Net income (7,829) (13,068) 21,401 36,549
Policy Benefit Reserves, Single Premium Immediate Annuities [Member]
       
Change in other policy funds and contract claims       4,200
Net income       $ 2,700