Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Federal corporate income tax rate		21.00%	35.00%	34.00%
Net tax benefit			$ 51,800,000
Effective tax rate on non deductible expense		4.20%	134.20%	50.00%
Deferred tax asset valuation allowance change in amount net		$ 6,900,000	$ 3,500,000	$ 1,700,000
Deferred tax asset valuation allowance amount decrease				(200,000)
Unrecognized tax benefits		4,609,000	5,655,000	4,741,000	$ 5,724,000
Amount of unrecognized tax benefits would, if recognized, impact effective tax rate		4,000,000
Decrease in unrecognized income benefits and interest		1,800,000
Impact of these tax holidays decreased foreign taxes		0	$ 800,000	$ 700,000
Benefit of the tax holidays on net income per share (diluted)			$ 0.03	$ 0.03
State Net Operating Loss Carryforwards
Income Taxes [Line Items]
Deferred tax asset valuation allowance amount increase			$ 2,300,000	$ 1,900,000
Foreign Net Operating Loss Carryforwards
Income Taxes [Line Items]
Deferred tax asset valuation allowance amount increase			1,200,000
Foreign Tax Authority
Income Taxes [Line Items]
Interest on income taxes accrued		100,000		100,000
NOL carryovers		$ 10,700,000
NOL carryovers expiration beginning year		2026
Tax credits in foreign jurisdictions		$ 4,100,000
United States
Income Taxes [Line Items]
Interest on income taxes accrued		$ 200,000	200,000	$ 200,000
NOL carryovers expiration beginning year		2024
Tax credits in foreign jurisdictions		$ 5,300,000
State and Local Jurisdiction
Income Taxes [Line Items]
NOL carryovers		$ 101,600,000
NOL carryovers expiration beginning year		2030
Scenario, Adjustment
Income Taxes [Line Items]
Net tax benefit			$ 800,000
Scenario, Forecast
Income Taxes [Line Items]
Net tax benefit	$ 6,000,000