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Summary of Significant Accounting Policies - Schedule of Components of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Assets: |  |
Net Carrying Amount | $ 1,467,025 | $ 1,506,522
Customer relationship intangible assets |  |
Assets: |  |
Gross Carrying Amount | 1,766,769 | 1,718,919
Accumulated Amortization | (511,672) | (455,705)
Net Carrying Amount | 1,255,097 | 1,263,214
Customer inducements |  |
Assets: |  |
Gross Carrying Amount | 52,542 | 56,478
Accumulated Amortization | (29,091) | (34,181)
Net Carrying Amount | 23,451 | 22,297
Data center lease-based intangible assets |  |
Assets: |  |
Gross Carrying Amount | 266,263 | 271,818
Accumulated Amortization | (77,786) | (50,807)
Net Carrying Amount | 188,477 | 221,011
Liabilities: |  |
Gross Carrying Amount | 12,765 | 12,318
Accumulated Amortization | (2,954) | (1,642)
Net Carrying Amount | 9,811 | 10,676
Third-party commissions asset |  |
Assets: |  |
Gross Carrying Amount | 31,391 | 30,071
Accumulated Amortization | (1,874) | (1,089)
Net Carrying Amount | 29,517 | 28,982
Customer relationships, customer inducements and data center |  |
Assets: |  |
Gross Carrying Amount | 2,116,965 | 2,077,286
Accumulated Amortization | (620,423) | (541,782)
Net Carrying Amount | $ 1,496,542 | $ 1,535,504

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