Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Equity Securities [Member]
      
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]      
Fair Value, beginning of period $ 1,489 $ 2,652 $ 1,792
Included In Earnings      
Realized investment gains (losses), net 427 (1,423) (3,315)
Asset management fees and other income 0 0 0
Interest credited to policyholders' account balances   0  
Included in other comprehensive income (loss) 71 264 2,840
Net Investment Income 0 0 0
Purchases 65 0 1,696
Sales (1,483) 0 0
Issuances 0 0 0
Settlements 0 0 (99)
Other 0 [1] 0 (8,957)
Transfers into Level 3 0 [2] 0 [2] 8,695
Transfers out of Level 3 0 [2] (4) [2] 0
Fair Value, end of period 569 1,489 2,652
Included In Earnings      
Realized investment gains (losses), net 0 [3] 0 [3] (2,918)
Asset management fees and other income 0 [3] 0 [3] 0
Interest credited to policyholders' account balances     0
Short-term Investments [Member]
      
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]      
Fair Value, beginning of period 0    
Included In Earnings      
Realized investment gains (losses), net 0    
Asset management fees and other income 0    
Included in other comprehensive income (loss) 0    
Net Investment Income 0    
Purchases 0    
Sales 0    
Issuances 0    
Settlements 0    
Other 0 [1]    
Transfers into Level 3 18 [2]    
Transfers out of Level 3 0 [2]    
Fair Value, End of Period (18)    
Included In Earnings      
Realized investment gains (losses), net 0 [3]    
Asset management fees and other income 0 [3]    
Debt Securities [Member] | US Treasury And Government [Member]
      
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]      
Fair Value, beginning of period   4,696 0
Included In Earnings      
Realized investment gains (losses), net   0 0
Asset management fees and other income   0 0
Included in other comprehensive income (loss)   4 (4)
Net Investment Income   0 0
Purchases   0 4,700
Sales   0 0
Issuances   0 0
Settlements   0 0
Other   (4,700) 0
Transfers into Level 3   0 [2] 0
Transfers out of Level 3   0 [2] 0
Fair Value, end of period   0 4,696
Included In Earnings      
Realized investment gains (losses), net   0 [3] 0
Asset management fees and other income   0 [3] 0
Interest credited to policyholders' account balances     0
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 36,981 23,720 49,050
Included In Earnings      
Realized investment gains (losses), net (1,177) (3,454) (3,311)
Asset management fees and other income 0 0 0
Included in other comprehensive income (loss) (1,641) 4,070 (1,126)
Net Investment Income 90 101 219
Purchases 14,996 8,714 7,534
Sales (2,329) (89) (678)
Issuances 0 0 883
Settlements (22,446) (8,656) (20,679)
Other 0 [1] 4,700 0
Transfers into Level 3 112 [2] 23,995 [2] 10,444
Transfers out of Level 3 (6,293) [2] (16,120) [2] (18,616)
Fair Value, end of period 18,293 36,981 23,720
Included In Earnings      
Realized investment gains (losses), net (1,648) [3] 0 [3] (4,319)
Asset management fees and other income 0 [3] 0 [3] 0
Interest credited to policyholders' account balances     0
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 108,727 62,429 59,770
Included In Earnings      
Realized investment gains (losses), net 0 687 803
Asset management fees and other income 0 0 0
Included in other comprehensive income (loss) (294) 2,840 (694)
Net Investment Income 257 364 768
Purchases 33,078 62,524 23,001
Sales (1) 0 (8,160)
Issuances 0 0 0
Settlements (23,098) (14,566) (9,094)
Other (2,496) [1] 0 0
Transfers into Level 3 0 [2] 5,702 [2] 0
Transfers out of Level 3 (35,239) [2] (11,253) [2] (3,965)
Fair Value, end of period 80,934 108,727 62,429
Included In Earnings      
Realized investment gains (losses), net 0 [3] 0 [3] (10)
Asset management fees and other income 0 [3] 0 [3] 0
Interest credited to policyholders' account balances     0
Commercial Mortgage Loans [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 0 0 0
Included In Earnings      
Realized investment gains (losses), net 0 0 0
Asset management fees and other income 0 0 0
Included in other comprehensive income (loss) (3) (65) 0
Net Investment Income 0 3 0
Purchases 12,524 0 5,019
Sales 0 0 0
Issuances 0 0 0
Settlements (3,434) (2,496) 0
Other 0 [1] 0 0
Transfers into Level 3 0 [2] 5,246 [3] 0
Transfers out of Level 3 (9,087) [2] (2,688) [2] (5,019)
Fair Value, end of period 0 0 0
Included In Earnings      
Realized investment gains (losses), net 0 [3] 0 [3] 0
Asset management fees and other income 0 [3] 0 [3] 0
Interest credited to policyholders' account balances     0
Other Long-term Investments [Member]
      
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]      
Fair Value, beginning of period 988 686 0
Included In Earnings      
Realized investment gains (losses), net (232) (4,659) 102
Asset management fees and other income 144 (7) (46)
Interest credited to policyholders' account balances 0 0 0
Included in other comprehensive income (loss) 0 0 0
Net Investment Income 0 0 0
Purchases 268 4,966 630
Sales 0 0 0
Issuances 0 0 0
Settlements 0 2 0
Other 0 [1]   0
Transfers into Level 3 0 [2] 0 [2] 0
Transfers out of Level 3 0 [2] 0 [2] 0
Fair Value, end of period 1,168 988 686
Included In Earnings      
Realized investment gains (losses), net 0 [3] (4,549) [3] 75
Asset management fees and other income 122 [3] (7) [3] (46)
Interest credited to policyholders' account balances 0 [3] 0 [3] 0
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 1,995 0 24,278
Included In Earnings      
Realized investment gains (losses), net 0 0 0
Asset management fees and other income 0 0 0
Interest credited to policyholders' account balances 0 0 0
Included in other comprehensive income (loss) (25) (5) (55)
Net Investment Income 0 0 0
Purchases 5,147 2,000 431
Sales (3,495) 0 0
Issuances 0 0 0
Settlements 0 0 (3)
Other 2,496 [1]   0
Transfers into Level 3 0 [2] 0 [2] 0
Transfers out of Level 3 (1,997) [2] 0 [2] (24,651)
Fair Value, end of period 4,121 1,995 0
Included In Earnings      
Realized investment gains (losses), net 0 [3] 0 [3] 0
Asset management fees and other income 0 [3] 0 [3] 0
Interest credited to policyholders' account balances 0 [3] 0 [3] 0
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 3,277 3,362 0
Included In Earnings      
Realized investment gains (losses), net 0 0 0
Asset management fees and other income 953 (35) (595)
Included in other comprehensive income (loss) 0 0 0
Net Investment Income 0 0 0
Purchases 380 0 0
Sales (1,499) 0 0
Issuances 0 0 0
Settlements (380) (50) (5,000)
Other 0 [1] 0 8,957
Transfers into Level 3 0 [2] 0 [2] 0
Transfers out of Level 3 0 [2] 0 [2] 0
Fair Value, end of period 2,731 3,277 3,362
Included In Earnings      
Realized investment gains (losses), net 0 [3] 0 [3] 0
Asset management fees and other income 869 [3] (35) [3] (876)
Interest credited to policyholders' account balances     0
Separate Accounts Asset [Member]
      
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]      
Fair Value, beginning of period 248,255 [4] 222,323 [3],[4] 198,451
Included In Earnings      
Realized investment gains (losses), net 1,966 [4] (1,476) [4] 388
Asset management fees and other income 0 [4] 0 [4] 0
Interest credited to policyholders' account balances 18,978 [4] 12,377 [4] 1,815
Included in other comprehensive income (loss) 0 [4] 0 [4] 0
Net Investment Income 0 [4] 0 [4] 0
Purchases 80,302 [4] 94,515 [4] 86,744
Sales (69,659) [4]   (65,075)
Sales   79,484 [4]  
Issuances 0 [4] 0 [4] 0
Settlements 0 [4] 0 [4] 0
Other 0 [1]   0
Transfers into Level 3 0 [2],[4] 0 [2],[4] 0
Transfers out of Level 3 0 [2],[4] 0 [2],[4] 0
Fair Value, end of period 279,842 [4] 248,255 [4] 222,323 [3],[4]
Included In Earnings      
Realized investment gains (losses), net 0 [3],[4] 0 [3],[4] 0
Asset management fees and other income 0 [3],[4] 0 [3],[4] 0
Interest credited to policyholders' account balances 18,978 [3],[4] 12,377 [3],[4] 1,815
Future Policy Benefits [Member]
      
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]      
Fair Value, beginning of period (1,417,891) (912,986) 452,822
Included In Earnings      
Realized investment gains (losses), net 2,342,621 (61,390) (1,091,846)
Asset management fees and other income 0 0 0
Interest credited to policyholders' account balances 0 0 0
Included in other comprehensive income (loss) 0 0 0
Net Investment Income 0 0 0
Purchases 0 0 0
Sales 0 0 0
Issuances (576,331)   (273,962)
Issuances   443,515  
Settlements 0 0 0
Other 0 [1]   0
Transfers into Level 3 0 [2] 0 [2] 0
Transfers out of Level 3 0 [2] 0 [2] 0
Fair Value, end of period 348,399 (1,417,891) (912,986)
Included In Earnings      
Realized investment gains (losses), net 2,318,266 [3] (76,581) [3] (1,085,926)
Asset management fees and other income 0 [3] 0 [3] 0
Interest credited to policyholders' account balances 0 [3] 0 [3] 0
Other Liabilities [Member]
      
Included In Earnings      
Realized investment gains (losses), net (2,210,096) [5]    
Interest credited to policyholders' account balances 0 [5]    
Included in other comprehensive income (loss) 0 [5]    
Net Investment Income 0 [5]    
Purchases 534,671 [5]    
Sales 0 [5]    
Issuances 0 [5]    
Settlements 0 [5]    
Transfers into Level 3 0 [2],[5]    
Transfers out of Level 3 0 [2],[5]    
Fair Value, end of period (388,268) [5]    
Included In Earnings      
Realized investment gains (losses), net (2,188,291) [3],[5]    
Asset management fees and other income 0 [3],[5]    
Interest credited to policyholders' account balances 0 [3],[5]    
Other Liabilities [Member] | Reclassified Balance [Member]
      
Included In Earnings      
Fair Value, end of period   1,287,157 [5]  
Reinsurance Recoverable [Member]
      
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]      
Fair Value, beginning of period 1,287,157 868,824 (373,000)
Included In Earnings      
Realized investment gains (losses), net 11,400 2,937 934,112
Asset management fees and other income 0 [5] 0 0
Interest credited to policyholders' account balances 0 0 0
Included in other comprehensive income (loss) 0 0 0
Net Investment Income 0 0 0
Purchases 0 415,396 307,712
Sales 0 0 0
Issuances 0 0 0
Settlements 0 0 0
Other 0 [1],[5]     
Transfers into Level 3 0 [2] 0 [2] 0
Transfers out of Level 3 0 [2] 0 [2] 0
Fair Value, end of period 11,400 1,287,157 868,824
Included In Earnings      
Realized investment gains (losses), net 11,400 [3] 17,516 [3] 973,717
Asset management fees and other income 0 [3] 0 [3] 0
Interest credited to policyholders' account balances 0 [3] 0 [3] 0
Reinsurance Recoverable [Member] | Reclassified Balance [Member]
      
Included In Earnings      
Fair Value, end of period   $ 0  
[1] (4) Other primarily represents reclasses of certain assets between reporting categories. (5) Reinsurance of variable annuity living benefit features classified as “Reinsurance Recoverables” at December 31, 2012, were reclassified to “Other Liabilities” – at December 31, 2013 as they were in a net liability position.
[2] (2) 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.
[3] (3) 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.
[4] (1) Separate account assets represent segregated funds that are invested for certain customers. Investment risks associated with market value changes are borne by the customers, except to the extent of minimum guarantees made by the Company with respect to certain accounts. Separate account liabilities are not included in the above table as they are reported at contract value and not fair value in the Company’s Consolidated Statement of Financial Position.
[5] Reinsurance of variable annuity living benefit features classified as “Reinsurance Recoverables” at December 31, 2012, were reclassified to “Other Liabilities” – at December 31, 2013 as they were in a net liability position.