Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Income tax expense (benefit)	$ 19,349		$ 3,030	$ 24,606	$ 11,986
Deferred tax asset, valuation allowance	$ 23,900			$ 23,900			$ 200
Effective income tax rate	(69.60%)			(22.10%)
Canadian statutory tax rate	26.20%			26.20%
Deferred income tax asset after valuation allowance	$ 17,700			$ 17,700			23,900
Deferred income tax liabilities	18,700	$ 18,700		18,700		$ 19,700
Cash held outside of Canada	76,400			76,400			90,100
Reduction in foreign withholding taxes		$ 1,000
Republic of China [Member]
Income Tax Contingency [Line Items]
Cash held/undistributed earnings intended to be permanently reinvested	62,600			62,600			$ 67,600
Impact of COVID-19 Pandemic [Member]
Income Tax Contingency [Line Items]
Deferred tax asset, valuation allowance	$ 23,700			$ 23,700