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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax expense (benefit) | $ 4,402 | $ 19,349 | $ 9,416 | $ 24,606 |
Effective income tax rate | (226.60%) | (69.60%) | (69.50%) | (22.10%) |
Canadian statutory tax rate | 26.20% |  | 26.20% |  |
Deferred tax asset, valuation allowance | $ 45,500 |  | $ 45,500 |  | $ 28,800
Deferred income tax asset after valuation allowance | 18,700 |  | 18,700 |  | $ 18,000
Deferred income tax asset, valuation allowance change |  |  | 16,700 |  |
Deferred income tax (benefit) expense |  |  | (1,687) | $ 23,142 |
Payment of foreign withholding taxes |  |  | 2,000 |  |
Foreign Country [Member] | China [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Deferred income tax (benefit) expense | 20,400 |  | 20,400 |  |
Shareholder's Equity [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Deferred income tax asset, valuation allowance change |  |  | 2,500 |  |
Income Tax Expense [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Deferred income tax asset, valuation allowance change |  |  | 14,200 |  |
Impact of COVID-19 Pandemic [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Deferred tax asset, valuation allowance | $ 4,300 |  | $ 4,300 |  |

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