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Acquisitions - Narrative (Details) $ / shares in Units, € in Thousands, £ in Thousands, $ in Thousands							1 Months Ended				12 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 ($) data_center	Jan. 10, 2018 USD ($) data_center	Feb. 28, 2019 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2017 GBP (£) shares	Dec. 31, 2019 USD ($) company	Dec. 31, 2018 USD ($) company	Dec. 31, 2017 USD ($) acquisition company
Storage and Data Management Company
Business Acquisition [Line Items]
Number of companies acquired | company											10	11
Storage, Records Management And Art Storage Companies
Business Acquisition [Line Items]
Cash consideration											$ 51,000,000
Storage, Records Management And Art Storage Companies | Maximum
Business Acquisition [Line Items]
Purchase price											12,500,000
Storage, Records Management And Art Storage Companies | Minimum
Business Acquisition [Line Items]
Purchase price											700,000
IO Data Center LLC
Business Acquisition [Line Items]
Cash consideration												$ 1,347,046,000
Purchase price						$ 1,347,000,000	$ 31,000,000					$ 1,347,046,000
Number of data centers | data_center						4
Operating expenditures											$ 28,064
EvoSwitch
Business Acquisition [Line Items]
Cash consideration	$ 222,000,000	€ 189,000
Potential additional payments to be made	$ 25,000,000
Credit Suisse Data Center Acquisition
Business Acquisition [Line Items]
Purchase price			$ 111,400,000	£ 34,600	$ 81,000
Number of data centers | data_center			2	2	2
Art Storage Company
Business Acquisition [Line Items]
Number of companies acquired | company											1	3	1
Other 2018 Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Purchase price												$ 98,100,000
Other 2018 Individually Immaterial Business Acquisitions | Maximum
Business Acquisition [Line Items]
Purchase price												34,100,000
Other 2018 Individually Immaterial Business Acquisitions | Minimum
Business Acquisition [Line Items]
Purchase price												$ 1,000,000
Santa Fe China Transaction
Business Acquisition [Line Items]
Purchase price								$ 16,800,000
Bonded Transaction
Business Acquisition [Line Items]
Purchase price									$ 83,000,000	£ 62,000
FORTRUST
Business Acquisition [Line Items]
Cash consideration									54,500,000
Purchase price									$ 137,500,000
Share price (in dollars per share) | $ / shares									$ 37.84
FORTRUST | Common Stock
Business Acquisition [Line Items]
Issuance of common stock (in shares) | shares									2,193,637	2,193,637
Storage and Records Management Company
Business Acquisition [Line Items]
Number of companies acquired | acquisition													12
Other 2017 Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Purchase price													$ 98,200,000
Other 2017 Individually Immaterial Business Acquisitions | Maximum
Business Acquisition [Line Items]
Purchase price													28,500,000
Other 2017 Individually Immaterial Business Acquisitions | Minimum
Business Acquisition [Line Items]
Purchase price													$ 100,000

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