Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets and Liabilities - Schedule of Components of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets:
Finite-Lived Intangible Assets, Net Carrying Amount	$ 1,495,338	$ 1,506,522
Customer relationship intangible assets
Assets:
Finite-Lived Intangible Assets, Gross	1,754,794	1,718,919
Finite-Lived Intangible Assets, Accumulated Amortization	(482,971)	(455,705)
Finite-Lived Intangible Assets, Net Carrying Amount	1,271,823	1,263,214
Customer inducements
Assets:
Finite-Lived Intangible Assets, Gross	51,405	56,478
Finite-Lived Intangible Assets, Accumulated Amortization	(28,711)	(34,181)
Finite-Lived Intangible Assets, Net Carrying Amount	22,694	22,297
Data center lease-based intangible assets
Assets:
Finite-Lived Intangible Assets, Gross	265,834	271,818
Finite-Lived Intangible Assets, Accumulated Amortization	(65,013)	(50,807)
Finite-Lived Intangible Assets, Net Carrying Amount	200,821	221,011
Liabilities:
Data center Below Market Lease, Gross Carrying Amount	12,715	12,318
Below Market Lease, Accumulated Amortization	(2,451)	(1,642)
Below Market Lease, Net Carrying Amount	10,264	10,676
Capitalized commissions asset
Assets:
Finite-Lived Intangible Assets, Gross	30,861	30,071
Finite-Lived Intangible Assets, Accumulated Amortization	(737)	(1,089)
Finite-Lived Intangible Assets, Net Carrying Amount	30,124	28,982
Customer relationships, customer inducements and data center
Assets:
Finite-Lived Intangible Assets, Gross	2,102,894	2,077,286
Finite-Lived Intangible Assets, Accumulated Amortization	(577,432)	(541,782)
Finite-Lived Intangible Assets, Net Carrying Amount	$ 1,525,462	$ 1,535,504