Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Income Taxes [Line Items]
Provision for income taxes	$ 1,083	$ 1,375	$ 2,219	$ 3,115
Effective income tax rate	3.40%	2.90%	19.80%	8.70%
ASU 2015-17 | Restatement Adjustment
Income Taxes [Line Items]
Current deferred tax liabilities					$ (2,700)
Non-current deferred tax assets					$ (400)