Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Beginning balance	$ 27,522	$ 16,363	$ 14,067
Reductions	0	0	0
Reductions	(11,110)	(742)	0
Settlements	0	0	0
Lapses in statute of limitations	0	0	0
Ending balance	17,384	27,522	16,363
Federal [Member]
Income Tax Contingency [Line Items]
Tax positions related to current year, Additions	529	502	477
Tax positions related to prior year, Additions	0	0	636
State [Member]
Income Tax Contingency [Line Items]
Tax positions related to current year, Additions	443	6,141	381
Tax positions related to prior year, Additions	0	5,258	0
Foreign [Member]
Income Tax Contingency [Line Items]
Tax positions related to prior year, Additions	$ 0	$ 0	$ 802