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Life Insurance Subsidiaries Level 4 (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Oct. 31, 2011
Statutory Accounting Practices [Line Items]        
Statutory Accounting Practices, Statutory Capital and Surplus, Balance $ 1,658,929,000     $ 1,597,018,000
Statutory Accounting Practices, Statutory Capital and Surplus, Company Action Level 524,928,000 479,023,000    
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments 99,200,000      
Statutory Accounting Practices, Statutory Net Income Amount 82,039,000 169,365,000 177,311,000  
Statutory Accounting Practices, Statutory Capital and Surplus, Balance $ 1,741,638,000 $ 1,655,205,000    
Capital to Risk Weighted Assets 332.00% 346.00%