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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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