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Acquisitions - Narrative (Details) $ in Thousands |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jan. 10, 2018 USD ($) | Feb. 28, 2019 USD ($) | Sep. 30, 2019 USD ($) company
Storage and Data Management Company |  |  |
Business Acquisition [Line Items] |  |  |
Number of businesses acquired | company |  |  | 9
Art Storage Company |  |  |
Business Acquisition [Line Items] |  |  |
Number of businesses acquired | company |  |  | 1
Storage, Records Management and Art Storage Companies |  |  |
Business Acquisition [Line Items] |  |  |
Cash consideration |  |  | $ 49,200
IO Data Center LLC |  |  |
Business Acquisition [Line Items] |  |  |
Consideration transferred | $ 1,347,000 | $ 31,000 |
Business combination separately recognized transactions expenses and losses recognized, acquisition costs incurred to date |  |  | $ 28,064

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