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REVENUE - Disaggregation of Revenue by Industry Vertical (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | $ 659,325 | $ 522,310 | $ 413,439
Media and Entertainment |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 156,292 | 133,093 | 99,640
Travel & Hospitality |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 92,773 | 89,212 | 68,400
Banks, Financial Services and Insurance |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 143,788 | 114,439 | 94,994
Technology & Telecommunications |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 88,183 | 67,310 | 60,648
Professional Services |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 73,282 | 52,318 | 40,660
Consumer, Retail & Manufacturing |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 85,698 | 54,087 | 36,025
Other Verticals |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | $ 19,309 | $ 11,851 | $ 13,072

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2019-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2019-en-r&anchor=para_113_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2019-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2019-en-r&anchor=para_114&doctype=Standard -URIDate 2019-03-27 + Details
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