XML 64 R51.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Values of Financial Instruments (Reconciliation of Beginning and Ending Balances of Level 3 Liabilities) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance $ 8,790,427 $ 6,563,288
Premiums less benefits 1,542,606 2,052,985
Change in fair value, net (2,167,628) 174,154
Ending balance 8,165,405 8,790,427
Coinsurance ceded, fixed index annuities embedded derivatives 4,954,068 4,858,289
Fixed Index Annuities - Embedded Derivatives    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Coinsurance ceded, fixed index annuities embedded derivatives $ 538,800 $ 539,700