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Federal Income Taxes (Reconciliation of Federal Income Tax on Income from Continuing Operations at the Corporate Rate to the Effective Tax Rate) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Federal Income Taxes [Abstract]      
Tax at statutory rate of 35% $ 2,823 $ 28,685 $ 13,715
Tax-advantaged interest (14,381) (15,992) (18,205)
Dividends received deduction (870) (357) (513)
Nonqualified deferred compensation 7 (273) (721)
Other (29) 572 252
Total federal income tax (benefit) expense $ (12,450) $ 12,635 $ (5,472)