Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
State and foreign net operating loss carry forwards	$ 34,478	$ 30,799
State tax credits	8,890	5,026
Valuation allowance	12,048	10,968
Increase in valuation allowance	1,100
Unrecognized tax benefits that would impact effective tax rate	4,200
Unrecognized tax benefit that would be offset by tax benefits associated with transfer pricing adjustment	17,300
Unrecognized tax benefit with uncertainty about timing of deductibility	8,800
Accrued interest	$ 2,700	$ 2,200
Minimum
Income Taxes [Line Items]
Period of income tax returns examination after filing	3 years
Maximum
Income Taxes [Line Items]
Period of income tax returns examination after filing	5 years
Resolution of uncertain tax positions | Minimum
Income Taxes [Line Items]
Decrease in gross liability for uncertain tax positions	$ 16,000
Resolution of uncertain tax positions | Maximum
Income Taxes [Line Items]
Decrease in gross liability for uncertain tax positions	$ 21,000