XML 51 R45.htm IDEA: XBRL DOCUMENT v2.4.0.8
Summary of Volume and Fair Value Positions of Derivative Instruments and Reporting Location in Statement of Financial Position (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Derivatives, Fair Value [Line Items]    
Total derivatives, Notional amount $ 2,766,225 $ 3,298,473
Total derivatives (267,859) (314,926)
Derivatives not designated as accounting hedging instruments | Contractholder funds | Derivatives embedded in life and annuity contracts - Equity-indexed and forward starting options
   
Derivatives, Fair Value [Line Items]    
Total liability derivatives, Notional amount 2,591,090 3,098,496
Total liability derivatives, Fair value, net (258,415) (295,305)
Derivatives not designated as accounting hedging instruments | Contractholder funds | Guaranteed accumulation benefits
   
Derivatives, Fair Value [Line Items]    
Total liability derivatives, Notional amount 152,936 174,791
Total liability derivatives, Fair value, net (8,970) (18,047)
Derivatives not designated as accounting hedging instruments | Contractholder funds | Guaranteed withdrawal benefits
   
Derivatives, Fair Value [Line Items]    
Total liability derivatives, Notional amount 22,199 25,186
Total liability derivatives, Fair value, net $ (474) $ (1,574)