Income Taxes - Significant Portions of Deferred Tax Liabilities and Deferred Tax Assets (Detail) - Successor [Member] - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deferred tax liabilities:
Insurance intangible	$ 325,906	$ 336,728
Variable interest entities	46,022	46,343
Investments	52,647	38,656
Unearned premiums and credit fees	66,739	68,682
Undistributed Earnings of Foreign Subsidiaries	57,565	30,699
Other	4,413	4,276
Deferred Tax Liabilities, Gross, Noncurrent	553,292	525,384
Deferred tax assets:
Net operating loss and capital carryforward	1,420,188	1,409,565
Loss reserves	271,552	224,553
AMT Credits	31,533	31,532
Other	16,267	16,726
Sub total deferred tax assets	1,739,540	1,682,376
Valuation allowance	1,187,994	1,158,712
Total deferred tax assets	551,546	523,664
Deferred Tax Liabilities, Net	$ 1,746	$ 1,720