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Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Schedule of Components of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Assets: |  |
Gross Carrying Amount | $ 2,120,112 | $ 2,102,219
Accumulated Amortization | (744,260) | (681,462)
Net Carrying Amount | 1,375,852 | 1,420,757
Customer relationship intangible assets |  |
Assets: |  |
Gross Carrying Amount | 1,764,106 | 1,751,848
Accumulated Amortization | (582,954) | (544,721)
Net Carrying Amount | 1,181,152 | 1,207,127
Customer inducements |  |
Assets: |  |
Gross Carrying Amount | 54,485 | 52,718
Accumulated Amortization | (28,706) | (29,397)
Net Carrying Amount | 25,779 | 23,321
Data center lease-based intangible assets |  |
Assets: |  |
Gross Carrying Amount | 265,491 | 265,945
Accumulated Amortization | (126,140) | (103,210)
Net Carrying Amount | 139,351 | 162,735
Liabilities: |  |
Gross Carrying Amount | 12,751 | 12,750
Accumulated Amortization | (4,884) | (3,937)
Net Carrying Amount | 7,867 | 8,813
Third-party commissions asset |  |
Assets: |  |
Gross Carrying Amount | 36,030 | 31,708
Accumulated Amortization | (6,460) | (4,134)
Net Carrying Amount | $ 29,570 | $ 27,574

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