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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Services | $ 362,130 | $ 379,743 | $ 690,921 | $ 706,711
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 284,659 | 295,268 | 547,676 | 551,792
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 24,564 | 33,086 | 46,942 | 59,465
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 52,907 | 51,389 | 96,303 | 95,454
Food & Beverage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 73,305 | 84,464 | 139,969 | 147,932
Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 39,894 | 38,396 | 72,350 | 76,411
Consumer Products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 45,296 | 41,367 | 78,232 | 77,973
Communications |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 47,793 | 43,097 | 87,490 | 81,454
Automotive |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 18,541 | 25,294 | 36,732 | 45,788
Technology |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 28,876 | 23,540 | 54,279 | 45,080
Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 25,954 | 35,426 | 49,161 | 68,002
Financials |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 27,868 | 30,207 | 52,795 | 52,702
Transportation and Travel/Lodging |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | 27,050 | 18,776 | 44,085 | 33,664
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Services | $ 27,553 | $ 39,176 | $ 75,828 | $ 77,705

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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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