Data Centers Sites Acquired

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Subsequent Events (Detail) $ / shares in Units, $ in Thousands					12 Months Ended
	Feb. 10, 2021 $ / shares	Oct. 23, 2020 USD ($)	Jul. 08, 2020 USD ($)	Jan. 02, 2020 USD ($)	Dec. 31, 2020 USD ($) data_center_site	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Subsequent Event [Line Items]
Data centers \| data_center_site					224
Loss on debt extinguishment					$ 145,804	$ 52,825	$ 51,377
Senior Notes
Subsequent Event [Line Items]
Loss on debt extinguishment		$ 44,200	$ 93,500			52,900
Payments of redemption premium		29,300	77,800			43,300
Write-off of unamortized debt issuance costs		$ 14,900	$ 15,700			$ 9,600
Senior Notes \| 5.375% Senior Notes Due In 2022
Subsequent Event [Line Items]
Debt redemption				$ 343,700
Interest rate (percent)				5.375%	5.375%
Loss on debt extinguishment				$ 5,900	$ 5,900
Payments of redemption premium				4,600	4,600
Write-off of unamortized debt issuance costs				$ 1,300	$ 1,300
Subsequent event
Subsequent Event [Line Items]
Cash dividends declared per share (in dollars per share) \| $ / shares	$ 2.87