OFFSETTING OF ASSETS AND LIABILITIES - Schedule of Derivative Instruments by Liabilities (Details) - Successor - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Offsetting of Derivative Liabilities:
Gross Amounts of Recognized Liabilities	$ 659,444	$ 522,225
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	659,444	522,225
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	37,967	42,382
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	18,681	1,617
Net Amount	602,796	478,226
Repurchase agreements
Gross Amounts of Recognized Liabilities	660,000	438,185
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	660,000	438,185
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	0	0
Net Amount	660,000	438,185
Total Liabilities
Gross Amounts of Recognized Liabilities	1,319,444	960,410
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	1,319,444	960,410
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	37,967	42,382
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	18,681	1,617
Net Amount	1,262,796	916,411
Free-Standing derivatives
Offsetting of Derivative Liabilities:
Fair Value, Other Liabilities	56,648	43,999
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	56,648	43,999
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	37,967	42,382
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	18,681	1,617
Net Amount	0	0
Total derivatives, subject to a master netting arrangement or similar arrangement
Offsetting of Derivative Liabilities:
Fair Value, Other Liabilities	56,648	43,999
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	56,648	43,999
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	37,967	42,382
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	18,681	1,617
Net Amount	0	0
Embedded derivative - Modco reinsurance treaties
Offsetting of Derivative Liabilities:
Gross Amounts of Recognized Liabilities	226,344	178,362
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	226,344	178,362
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	0	0
Net Amount	226,344	178,362
Funds withheld derivative
Offsetting of Derivative Liabilities:
Gross Amounts of Recognized Liabilities	106,558	102,378
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	106,558	102,378
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	0	0
Net Amount	106,558	102,378
Embedded derivative - GMWB
Offsetting of Derivative Liabilities:
Gross Amounts of Recognized Liabilities	118,345	67,528
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	118,345	67,528
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	0	0
Net Amount	118,345	67,528
Embedded derivative - FIA
Offsetting of Derivative Liabilities:
Gross Amounts of Recognized Liabilities	113,552	100,329
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	113,552	100,329
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	0	0
Net Amount	113,552	100,329
Embedded derivative - IUL
Offsetting of Derivative Liabilities:
Gross Amounts of Recognized Liabilities	37,997	29,629
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	37,997	29,629
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	0	0
Net Amount	37,997	29,629
Total derivatives, not subject to a master netting arrangement or similar arrangement
Offsetting of Derivative Liabilities:
Gross Amounts of Recognized Liabilities	602,796	478,226
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	602,796	478,226
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	0	0
Net Amount	$ 602,796	$ 478,226