Income Taxes - Significant Portions of Deferred Tax Liabilities and Deferred Tax Assets (Detail) - Successor [Member] - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Deferred tax liabilities:
Insurance intangible	$ 319,260	$ 336,728
Variable interest entities	44,654	46,343
Investments	83,944	38,656
Unearned premiums and credit fees	67,940	68,682
Undistributed Earnings of Foreign Subsidiaries	67,715	30,699
Other	4,195	4,276
Deferred Tax Liabilities, Gross, Noncurrent	587,708	525,384
Deferred tax assets:
Net operating loss and capital carryforward	1,406,713	1,409,565
Loss reserves	297,313	224,553
AMT Credits	32,149	31,532
Other	17,324	16,726
Sub total deferred tax assets	1,753,499	1,682,376
Valuation allowance	1,167,657	1,158,712
Total deferred tax assets	585,842	523,664
Deferred Tax Liabilities, Net	$ 1,866	$ 1,720