FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Liabilities:
Senior notes	$ 123,008	$ 413,006
Junior subordinated notes	250,154	248,498
Successor Company | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash, restricted cash, and cash equivalents	1,139,549	807,496
Liabilities:
Senior notes	116,699	394,390
Junior subordinated notes	0	0
Successor Company | Significant Other Observable Inputs (Level 2)
Assets:
Cash, restricted cash, and cash equivalents	0	0
Liabilities:
Senior notes	0	0
Junior subordinated notes	0	0
Successor Company | Significant Unobservable Inputs (Level 3)
Assets:
Cash, restricted cash, and cash equivalents	0	0
Liabilities:
Senior notes	0	0
Junior subordinated notes	210,084	216,757
Successor Company | Carrying Amount
Assets:
Cash, restricted cash, and cash equivalents	1,139,549	807,496
Liabilities:
Senior notes	123,008	413,006
Junior subordinated notes	250,154	248,498
Successor Company | Estimated Fair Value
Assets:
Cash, restricted cash, and cash equivalents	1,139,549	807,496
Liabilities:
Senior notes	116,699	394,390
Junior subordinated notes	$ 210,084	$ 216,757