Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax provision	$ 16,050	$ 1,937	$ 29,256	$ 3,338
Liability for income taxes associated with uncertain tax positions	8,745		8,745
Net amount of unrecognized tax benefit related to uncertain tax positions that would impact, if recognized, effective income tax rate	1,361		1,361
Unrecognized tax benefit liabilities decrease	390		390
Increase in gross liability for uncertain tax positions	233		489
Provision expense (benefit) for income taxes related to interest and penalties	62	$ 54	109	$ 29
Income tax accrued for payment of interest and penalties	$ 1,426		$ 1,426		$ 1,317