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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Services | $ 342,907 | $ 375,830 | $ 1,033,828 | $ 1,082,541
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 271,671 | 296,544 | 819,347 | 848,336
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 25,895 | 32,132 | 72,837 | 91,597
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 45,341 | 47,154 | 141,644 | 142,608
Food & Beverage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 64,774 | 80,919 | 204,743 | 234,203
Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 39,420 | 40,421 | 111,899 | 116,832
Consumer Products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 38,510 | 40,124 | 119,866 | 118,097
Communications |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 48,147 | 46,779 | 136,819 | 128,232
Automotive |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 19,125 | 21,282 | 55,857 | 67,070
Technology |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 28,148 | 26,005 | 84,294 | 71,085
Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 25,152 | 33,751 | 74,403 | 101,753
Financials |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 28,054 | 30,378 | 81,049 | 83,079
Transportation and Travel/Lodging |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 20,541 | 19,357 | 65,111 | 53,021
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | $ 31,036 | $ 36,814 | $ 99,787 | $ 109,169

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 + Details
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