INVESTMENT OPERATIONS - Schedule of Amortized Cost and Fair Value of Available-for-Sale and Held-to-Maturity Fixed Maturities, by Expected Maturity (Details) - Successor - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Held-to-maturity, Fair Value
Fair Value	$ 2,853,788	$ 515,000
Fixed maturities
Available-for-sale, Amortized Cost
Due in one year or less	750,175
Due after one year through five years	6,878,977
Due after five years through ten years	7,673,357
Due after ten years	21,194,099
Total	36,496,608
Available-for-sale, Fair Value
Due in one year or less	750,605
Due after one year through five years	6,918,323
Due after five years through ten years	7,783,110
Due after ten years	20,433,578
Total	35,885,616
Held-to-maturity, Amortized Cost
Due after ten years	2,779,280
Amortized Cost	2,779,280	593,314
Held-to-maturity, Fair Value
Due after ten years	2,853,788
Fair Value	$ 2,853,788	$ 515,000