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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Services | $ 345,605 | $ 259,677 | $ 653,190 | $ 587,419
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 277,542 | 210,342 | 520,122 | 474,903
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 22,992 | 16,609 | 45,642 | 34,865
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 45,071 | 32,726 | 87,426 | 77,651
Food & Beverage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 62,462 | 46,811 | 117,640 | 104,396
Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 33,901 | 32,728 | 64,678 | 69,537
Consumer Products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 48,784 | 34,855 | 94,189 | 74,189
Communications |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 19,215 | 16,172 | 36,205 | 38,014
Automotive |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 13,945 | 13,020 | 29,574 | 38,212
Technology |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 54,810 | 38,846 | 101,200 | 88,341
Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 37,074 | 23,112 | 68,568 | 46,843
Financials |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 24,138 | 19,748 | 48,580 | 43,753
Transportation and Travel/Lodging |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 11,917 | 9,053 | 21,865 | 25,552
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | $ 39,359 | $ 25,332 | $ 70,691 | $ 58,582

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