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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Guaranteed minimum withdrawal benefits      
Goodwill $ 108,561,000 $ 111,659,000 $ 114,758,000
Annuity account balances
     
Guaranteed minimum withdrawal benefits      
Mortality rate assumed (as a percent) 57.00%    
Guaranteed minimum withdrawal benefits (GMWB) | Annuity account balances
     
Guaranteed minimum withdrawal benefits      
Mortality rate assumed (as a percent) 57.00%    
Guaranteed benefit liability, net $ 169,000,000