Income Taxes - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tax Credit Carryforward [Line Items]
Significant change in unrecognized tax benefits, nature of event	It is reasonably possible that the amount of the unrecognized benefit with respect to certain of our unrecognized tax positions will significantly increase or decrease within the next 12 months.
Significant change in unrecognized tax benefits is reasonably possible, estimated range not possible	These changes may be the result of settlements of ongoing audits or competent authority proceedings. At this time, an estimate of the range of the reasonably possible outcomes cannot be made.
Unrecognized tax benefits	$ 35,652	$ 32,209	$ 30,581	$ 28,849
Unrecognized tax benefits, if recognized, would affect the effective tax rate	$ 33,500
Income tax examination, description	We file income tax returns in the U.S. federal jurisdiction and in various state and foreign jurisdictions. We are no longer subject to U.S. federal income tax examinations by tax authorities for tax years before 2012 or tax year 2015. We are no longer subject to China income tax examinations by tax authorities for tax years before 2009. With respect to state and local jurisdictions and countries outside of the U.S., with limited exceptions, we are no longer subject to income tax audits for years before 2014. Although the outcome of tax audits is always uncertain, we believe that adequate amounts of tax, interest and penalties, if any, have been provided for in our reserve for any adjustments that may result from future tax audits. We recognize accrued interest and penalties, if any, related to unrecognized tax benefits in interest expense. We had an immaterial amount of accrued interest and penalties at December 31, 2019, 2018 and 2017.
Net deferred tax assets	$ 6,414	16,928
Tax credit carryforward, valuation allowance	8,000	19,000
Operating loss carryforward [Abstract]
Operating loss carryforwards, valuation allowance	19,000	7,000
Income taxes supplemental information [Abstract]
Statutory accounting practices, retained earnings not available for dividends	115
Additional tax on undistributed foreign earnings	46
Tax holidays	$ 3,100	$ 1,600	$ 3,700
Tax holidays basic EPS		$ 0.03	$ 0.08
Tax holidays diluted EPS	$ 0.06	$ 0.03	$ 0.08
China
Income taxes supplemental information [Abstract]
Deferred tax liabilities, undistributed foreign earnings	$ 425
State and Local Jurisdiction
Operating loss carryforward [Abstract]
Operating loss carryforwards	$ 1,000
Operating loss carryforwards, expiration dates	Jan. 01, 2020
Foreign Tax Authority
Operating loss carryforward [Abstract]
Operating loss carryforwards	$ 110,000
Operating loss carryforwards, expiration dates	Jan. 01, 2020
Income taxes supplemental information [Abstract]
Deferred tax liabilities, undistributed foreign earnings	$ 913
Federal and State Tax
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	$ 14,000
Federal
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration dates	Jan. 01, 2023
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration dates	Jan. 01, 2020
Research
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	$ 8,000
ASU No. 2013-11
Tax Credit Carryforward [Line Items]
Deferred tax assets operating loss carryforwards	5,200
Deferred tax assets excluding tax benefits for operating loss carryforwards	$ 1,200