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Summary of Significant Accounting Policies - Revenue - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Capitalized Contract Cost [Line Items]
Storage rental	$ 2,754,091	$ 2,681,087	$ 2,622,455
Service	$ 1,393,179	1,581,497	1,603,306
Commissions asset
Capitalized Contract Cost [Line Items]
Capitalized contract cost, amortization period	3 years
Intake Costs asset
Capitalized Contract Cost [Line Items]
Capitalized contract cost, amortization period	3 years
GLOBAL DATA CENTER BUSINESS
Capitalized Contract Cost [Line Items]
Storage rental	$ 263,695	246,925	218,675
Service	15,617	10,226	10,308
GLOBAL DATA CENTER BUSINESS | Power and connectivity
Capitalized Contract Cost [Line Items]
Storage rental	$ 47,451	$ 43,269	$ 38,749

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