Schedule of Unrecognized Tax Benefit Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits [Line Items]
Beginning balance	$ 50,240	$ 40,470
Additions based on tax positions related to the current year	22,480	11,720
Additions based on tax positions for prior years	0	180
Reductions for tax positions of prior years	(3,080)	(140)
Foreign currency translation effect	(1,130)	(1,990)
Ending balance	68,510	50,240
Income taxes paid, see below	(41,410)	(42,180)
Amounts, net of income taxes paid	$ 27,100	$ 8,060