Income Taxes - Narrative (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
Deferred tax liabilities relating to indefinite lived intangible assets		$ 13,971	$ 18,714
Valuation allowance		46,454	55,336
Federal, state and foreign net operating loss carryforwards		53,200	65,200
Deferred liabilities on undistributed foreign earnings		263	604
Unrecognized tax benefits		5,180	4,071	$ 3,777
Unrecognized tax benefits, which would affect the effective tax rate		4,900	3,800
Gross increases in current year unrecognized tax		1,100
Increase (decrease) in recognized interest and penalties		100	(200)	$ (200)
Unrecognized tax benefit accrued interest and penalties		500	400
India
Income Tax Contingency [Line Items]
Deferred liabilities on undistributed foreign earnings		200
Repatriated amount of foreign earnings		500
Other Current Liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits		100	100
Other Noncurrent Liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits		900	800
Indefinite-lived Intangible Assets
Income Tax Contingency [Line Items]
Deferred tax liabilities relating to indefinite lived intangible assets		$ 14,000	$ 18,700
Adjustment for Error Correction of Overstatement of Valuation Allowance
Income Tax Contingency [Line Items]
Reduction in valuation allowance	$ 1,700
Out-or-period adjustment, decrease in net loss per diluted share (usd per share)	$ 0.06			$ 0.06