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Acquisitions - Narrative (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands							1 Months Ended	9 Months Ended
	May 25, 2018 USD ($)	May 25, 2018 EUR (€)	Mar. 08, 2018 USD ($) data_center	Mar. 08, 2018 GBP (£) data_center	Mar. 08, 2018 SGD ($) data_center	Jan. 10, 2018 USD ($)	Aug. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)
IO Data Center LLC [Member]
Business Acquisition [Line Items]
Cash consideration								$ 1,347,046
Consideration transferred						$ 1,347,000		1,347,046
Business Combination, Contingent Consideration, Liability						$ 35,000
Business combination separately recognized transactions expenses and losses recognized, acquisition costs incurred to date								$ 28,064
Credit Suisse Data Center Acquisition
Business Acquisition [Line Items]
Number Of Data Centers | data_center			2	2	2
Consideration transferred			$ 111,400	£ 34,600	$ 81,000
EvoSwitch [Member]
Business Acquisition [Line Items]
Cash consideration	$ 222,000	€ 189,000
Business Combination, Contingent Consideration, Liability	$ 25,000
GRM Document Management [Member]
Business Acquisition [Line Items]
Consideration transferred							$ 34,100

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