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	Mar. 31, 2016	Dec. 31, 2015
Held-to-maturity, Fair Value
Fair Value	$ 2,757,674	$ 515,000
Fixed maturities
Available-for-sale, Amortized Cost
Due in one year or less	885,886
Due after one year through five years	6,367,797
Due after five years through ten years	7,536,358
Due after ten years	21,415,389
Total	36,205,430
Available-for-sale, Fair Value
Due in one year or less	884,908
Due after one year through five years	6,284,886
Due after five years through ten years	7,459,928
Due after ten years	19,663,280
Total	34,293,002
Held-to-maturity, Amortized Cost
Due after ten years	2,783,302
Amortized Cost	2,783,302	593,314
Held-to-maturity, Fair Value
Due after ten years	2,757,674
Fair Value	$ 2,757,674	$ 515,000