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Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Equity Securities [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets) $ 192  
Included In Earnings    
Realized investment gains (losses), net 0  
Asset management fees and other income - Assets1 0  
Included in other comprehensive income (loss) 0  
Net investment income1 0  
Purchases 0  
Sales 0  
Issuances 0  
Settlements 0  
Transfers into Level 3 0 [1]  
Transfers out of Level 3 0 [1]  
Fair Value, end of period (Assets) 192  
Included In Earnings    
Realized investment gains (losses), net 0 [2]  
Asset management fees and other income 0 [2]  
Debt Securities [Member] | Corporate Debt Securities [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets) 96,796 95,555
Included In Earnings    
Realized investment gains (losses), net 0 4
Asset management fees and other income - Assets1 0 0
Included in other comprehensive income (loss) 247 (271)
Net investment income1 1,224 1,154
Purchases 1,489 600
Sales 0 0
Issuances 0 0
Settlements (501) (1,467)
Transfers into Level 3 0 [1] 0 [1]
Transfers out of Level 3 0 [1] 0 [1]
Fair Value, end of period (Assets) 99,255 95,575
Included In Earnings    
Realized investment gains (losses), net 0 [2] 0 [2]
Asset management fees and other income 0 [2] 0 [2]
Debt Securities [Member] | Asset-backed Securities [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets) 63,789 69,298
Included In Earnings    
Realized investment gains (losses), net 0 0
Asset management fees and other income - Assets1 0 0
Included in other comprehensive income (loss) 178 162
Net investment income1 44 135
Purchases 14,933 7,058
Sales 0 0
Issuances 0 0
Settlements (3,882) (3,913)
Transfers into Level 3 27,663 [1] 0 [1]
Transfers out of Level 3 0 [1] 0 [1]
Fair Value, end of period (Assets) 102,725 72,740
Included In Earnings    
Realized investment gains (losses), net 0 [2] 0 [2]
Asset management fees and other income 0 [2] 0 [2]
Debt Securities [Member] | Commercial Mortgage Backed Securities [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets) 0 0
Included In Earnings    
Realized investment gains (losses), net 0 0
Asset management fees and other income - Assets1 0 0
Included in other comprehensive income (loss) (83) 0
Net investment income1 0 17
Purchases 45,448 9,090
Sales 0 0
Issuances 0 0
Settlements 0 0
Transfers into Level 3 0 [1] 0 [1]
Transfers out of Level 3 0 [1] 0 [1]
Fair Value, end of period (Assets) 45,365 9,107
Included In Earnings    
Realized investment gains (losses), net 0 [2] 0 [2]
Asset management fees and other income 0 [2] 0 [2]
Other Long-term Investments [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets) 486 1,054
Included In Earnings    
Realized investment gains (losses), net 0 (624)
Asset management fees and other income - Assets1 (9) 33
Included in other comprehensive income (loss) 0 0
Net investment income1 0 0
Purchases 43 0
Sales 0 0
Issuances 0 0
Settlements 0 0
Transfers into Level 3 0 [1] 0 [1]
Transfers out of Level 3 0 [1] 0 [1]
Fair Value, end of period (Assets) 520 463
Included In Earnings    
Realized investment gains (losses), net 0 [2] (624) [2]
Asset management fees and other income 0 [2] 33 [2]
Trading Asset [Member] | Equity Securities [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets) 313 207
Included In Earnings    
Realized investment gains (losses), net 0 0
Asset management fees and other income - Assets1 15 60
Included in other comprehensive income (loss) 0 0
Net investment income1 0 0
Purchases 0 0
Sales 0 0
Issuances 0 0
Settlements 0 0
Transfers into Level 3 0 [1] 0 [1]
Transfers out of Level 3 0 [1] 0 [1]
Fair Value, end of period (Assets) 328 267
Included In Earnings    
Realized investment gains (losses), net 0 [2] 0 [2]
Asset management fees and other income 15 [2] 61 [2]
Other Assets [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets)   1,995
Included In Earnings    
Realized investment gains (losses), net   0
Realized investment gains (losses), net   0
Included in other comprehensive income (loss)   5
Net investment income1   0
Purchases   0
Sales   0
Issuances   0
Settlements   0
Transfers into Level 3   0 [1]
Transfers out of Level 3   0 [1]
Fair Value, end of period (Assets)   2,000
Included In Earnings    
Realized investment gains (losses), net   0 [2]
Asset management fees and other income   0 [2]
Future Policy Benefits [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, Beginning of period (Liabilities) 778,226 1,793,136
Included In Earnings    
Realized investment gains (losses), net   623,786
Realized investment gains (losses), net (562,219) 0
Asset management fees and other income - Liabilities 0  
Included in other comprehensive income (loss) 0 0
Net investment income1 0 0
Purchases 0 0
Sales 0 0
Issuances 61,584 60,973
Settlements 0 0
Transfers into Level 3 0 [1] 0 [1]
Transfers out of Level 3 0 [1] 0 [1]
Fair Value, end of period (Assets)   (1,230,323)
Fair Value, End of Period (Liabilities) 1,402,029  
Included In Earnings    
Realized investment gains (losses), net (692,458) [2] 613,833 [2]
Asset management fees and other income 0 [2] 0 [2]
Cash and Cash Equivalents [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets) 0  
Included In Earnings    
Realized investment gains (losses), net 0  
Asset management fees and other income - Assets1 0  
Included in other comprehensive income (loss) 0  
Net investment income1 0  
Purchases 400  
Sales 0  
Issuances 0  
Settlements 0  
Transfers into Level 3 0 [1]  
Transfers out of Level 3 0 [1]  
Fair Value, end of period (Assets) 400  
Included In Earnings    
Realized investment gains (losses), net 0 [2]  
Asset management fees and other income 0 [2]  
Reinsurance Recoverable [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets) 748,005 1,732,094
Included In Earnings    
Realized investment gains (losses), net 537,854 (598,821)
Asset management fees and other income - Liabilities   0
Asset management fees and other income - Assets1 0  
Included in other comprehensive income (loss) 0 0
Net investment income1 0 0
Purchases 58,728 58,136
Sales 0 0
Issuances 0 0
Settlements 0 0
Transfers into Level 3 0 [1]    [1]
Transfers out of Level 3 0 [1] 0 [1]
Fair Value, end of period (Assets) 1,344,587 1,191,409
Included In Earnings    
Realized investment gains (losses), net 662,178 [2] (588,859) [2]
Asset management fees and other income 0 [2] 0 [2]
Receivables From Parents And Affiliates [Member]
   
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Fair Value, beginning of period (Assets) 6,347  
Included In Earnings    
Realized investment gains (losses), net 1  
Asset management fees and other income - Liabilities 0  
Included in other comprehensive income (loss) 11  
Net investment income1 0  
Purchases 0  
Sales 0  
Issuances 0  
Settlements 0  
Transfers into Level 3 1,985 [1]  
Transfers out of Level 3 0 [1]  
Fair Value, end of period (Assets) 8,344  
Included In Earnings    
Realized investment gains (losses), net 0 [2]  
Asset management fees and other income $ 0 [2]  
[1]   (1) Transfers into or out of Level 3 are generally reported as the value as of the beginning of the quarter in which the transfer occurs.
[2]   (2) Unrealized gains or losses related to assets still held at the end of the period do not include amortization or accretion of premiums and discounts.