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Goodwill and Other Intangible Assets - Definite-Lived Intangible Assets by Major Asset Class (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Finite Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Gross Carrying Amount | $ 972,600 | $ 972,600
Definite-lived intangible assets, Accumulated Amortization | (433,121) | (334,510)
Definite-lived intangible assets, Net Carrying Amount | 539,479 | 638,090
Customer Relationships |  |
Finite Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Gross Carrying Amount | 832,540 | 832,540
Definite-lived intangible assets, Accumulated Amortization | (343,925) | (273,799)
Definite-lived intangible assets, Net Carrying Amount | 488,615 | 558,741
Acquired Software |  |
Finite Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Gross Carrying Amount | 111,200 | 111,200
Definite-lived intangible assets, Accumulated Amortization | (78,831) | (53,002)
Definite-lived intangible assets, Net Carrying Amount | 32,369 | 58,198
Other Trade Names |  |
Finite Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Gross Carrying Amount | 23,900 | 23,900
Definite-lived intangible assets, Accumulated Amortization | (5,405) | (3,178)
Definite-lived intangible assets, Net Carrying Amount | 18,495 | 20,722
Non-compete Agreements |  |
Finite Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Gross Carrying Amount | 2,860 | 2,860
Definite-lived intangible assets, Accumulated Amortization | (2,860) | (2,431)
Definite-lived intangible assets, Net Carrying Amount | 0 | 429
Content Library |  |
Finite Lived Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Gross Carrying Amount | 2,100 | 2,100
Definite-lived intangible assets, Accumulated Amortization | (2,100) | (2,100)
Definite-lived intangible assets, Net Carrying Amount | $ 0 | $ 0

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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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