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Summary of Significant Accounting Policies - Long Lived Assets (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2021
USD ($)
unit
Jun. 30, 2021
USD ($)
unit
Dec. 31, 2020
USD ($)
facility
Sep. 30, 2020
USD ($)
facility
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Consolidated gain on disposal/write-down of property, plant and equipment, net         $ 172,041 $ 363,537 $ 63,824
Sale and sale-leaseback transactions         164,000 342,100 67,800
(Gain) Loss on disposal/write-down of property, plant and equipment, net             36,000
Intangible impairments         $ 0 23,000 0
5 Facilities In The United States              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Sale and sale-leaseback transactions   $ 127,400          
Number of facilities | unit   5          
9 Facilities In The United States              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Sale and sale-leaseback transactions $ 36,600            
Number of facilities | unit 9            
14 Facilities In The United States              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Sale and sale-leaseback transactions     $ 265,600        
Number of facilities | facility     14        
2 Facilities In The Unites States              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Sale and sale-leaseback transactions       $ 76,400      
Number of facilities | facility       2      
Iron Mountain Iron Cloud              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Consolidated gain on disposal/write-down of property, plant and equipment, net             25,000
Intangible impairments             $ 15,700
Frankfurt JV              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Gain on equity investment           $ 24,100