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Acquisitions - Narrative (Details) € in Thousands						3 Months Ended	12 Months Ended
	Sep. 23, 2021 USD ($)	Sep. 23, 2021 EUR (€)	Sep. 15, 2021 USD ($)	Feb. 17, 2020 USD ($)	Jan. 09, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2019 USD ($) company	Jan. 08, 2020
OSG Investment
Business Acquisition [Line Items]
Ownership percentage									25.00%
Gain on equity investment						$ 10,000,000
InfoFort
Business Acquisition [Line Items]
Cash consideration			$ 90,300,000
Frankfurt Data Center
Business Acquisition [Line Items]
Cash consideration	$ 91,300,000	€ 77,900
Records Management Company
Business Acquisition [Line Items]
Number of companies acquired							2
Art Storage Company
Business Acquisition [Line Items]
Number of companies acquired							1	1
Records Management Companies And Art Storage Company
Business Acquisition [Line Items]
Cash consideration							$ 45,100,000
OSG Acquisition
Business Acquisition [Line Items]
Cash consideration					$ 95,500,000
Ownership acquired					75.00%
Storage, Records Management And Art Storage Companies
Business Acquisition [Line Items]
Cash consideration				$ 29,100,000				$ 51,000,000
Storage, Records Management And Art Storage Companies | Minimum
Business Acquisition [Line Items]
Purchase price								700,000
Storage, Records Management And Art Storage Companies | Maximum
Business Acquisition [Line Items]
Purchase price								$ 12,500,000
Storage and Data Management Company
Business Acquisition [Line Items]
Number of companies acquired | company								10

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