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	Sep. 30, 2016	Dec. 31, 2015
Fair Value
Fair Value	$ 2,894,615	$ 515,000
Fixed maturities
Amortized Cost
Due in one year or less	786,505
Due after one year through five years	6,854,185
Due after five years through ten years	7,874,064
Due after ten years	21,476,337
Total	36,991,091
Fair Value
Due in one year or less	787,980
Due after one year through five years	6,921,417
Due after five years through ten years	8,031,551
Due after ten years	21,100,698
Total	36,841,646
Amortized Cost
Due after ten years	2,775,230
Amortized Cost	2,775,230	593,314
Fair Value
Due after ten years	2,894,615
Fair Value	$ 2,894,615	$ 515,000