OFFSETTING OF ASSETS AND LIABILITIES - Schedule of Derivative Instruments by Liabilities (Details) - Successor - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	$ 1,045,116	$ 629,555
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	1,045,116	629,555
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	66,347	42,382
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	6,685	1,617
Net Amount	972,084	585,556
Repurchase agreements
Gross Amounts of Recognized Liabilities	160,000	438,185
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	160,000	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	160,000	438,185
Total Liabilities
Gross Amounts of Recognized Liabilities	1,205,116	1,067,740
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	1,205,116	1,067,740
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	66,347	42,382
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	6,685	1,617
Net Amount	1,132,084	1,023,741
Total derivatives, subject to a master netting arrangement or similar arrangement
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	73,032	43,999
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	73,032	43,999
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	66,347	42,382
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	6,685	1,617
Net Amount	0	0
Free-Standing derivatives
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	73,032	43,999
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	73,032	43,999
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	66,347	42,382
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	6,685	1,617
Net Amount	0	0
Total derivatives, not subject to a master netting arrangement or similar arrangement
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	972,084	585,556
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	972,084	585,556
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	972,084	585,556
Embedded derivative - Modco reinsurance treaties
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	239,350	178,362
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	239,350	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	239,350	178,362
Embedded derivative - GMWB
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	566,026	277,236
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	566,026	277,236
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	566,026	277,236
Embedded derivative - FIA
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	119,997	100,329
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	119,997	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	119,997	100,329
Embedded derivative - IUL
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	46,711	29,629
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	46,711	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	$ 46,711	$ 29,629