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Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross | $ 1,052,792 | $ 923,199 |
Accumulated Amortization | (963,500) | (891,422) |
Effects of Foreign Currency Translation | (6,715) |  |
Net | $ 82,577 | $ 31,777 | $ 147,480
Weighted Average Remaining Amortization Period in Years | 2 years 4 months 24 days | 2 years |
Client relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross | $ 803,642 | $ 701,802 |
Accumulated Amortization | (748,460) | (701,518) |
Effects of Foreign Currency Translation | (5,326) |  |
Net | $ 49,856 | $ 284 | 85,615
Weighted Average Remaining Amortization Period in Years | 2 years 8 months 12 days | 1 year 4 months 24 days |
Trademarks and domain names |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross | $ 225,177 | $ 200,300 |
Accumulated Amortization | (193,978) | (169,545) |
Effects of Foreign Currency Translation | (1,389) |  |
Net | $ 29,810 | $ 30,755 | 60,533
Weighted Average Remaining Amortization Period in Years | 1 year 10 months 24 days | 2 years |
Patented technologies |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross | $ 19,600 | $ 19,600 |
Accumulated Amortization | (19,600) | (19,600) |
Effects of Foreign Currency Translation | 0 |  |
Net | 0 | 0 | 0
Covenants not to compete |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross | 4,373 | 1,497 |
Accumulated Amortization | (1,462) | (759) |
Effects of Foreign Currency Translation | 0 |  |
Net | $ 2,911 | $ 738 | $ 1,332
Weighted Average Remaining Amortization Period in Years | 2 years 7 months 6 days | 1 year 9 months 18 days |

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- Definition Finite Lived Intangible Assets, Accumulated Foreign Currency Gain (Loss) + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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