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Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense | $ 16,711 | $ 14,606 | $ 15,618
Cost of revenue |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense | 2,263 | 1,811 | 2,673
Selling, general and administrative expenses |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense | 14,448 | 12,795 | 12,945
Stock options |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense | 1,337 | 2,927 | 4,237
Performance-based stock options |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense | 0 | 75 | 448
RSUs |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense | 9,606 | 7,763 | 8,877
PSUs |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense | 2,471 | 0 | (388)
LSUs |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |
Share-based compensation expense | $ 3,297 | $ 3,841 | $ 2,444

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