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v3.19.3.a.u2

Summary of Significant Accounting Policies - Long Lived Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
(Gain) Loss on disposal/write-down of property, plant and equipment, net | $ 63,824 | $ 73,622 | $ 766
Sale and sale-leaseback transactions | 67,800 |  |
Loss on disposal/write-down of property, plant and equipment | (63,824) | (74,134) | $ (766)
Iron Mountain Iron Cloud |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Loss on disposal/write-down of property, plant and equipment | 25,000 |  |
United Kingdom |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gain on sale of real estate, net of tax |  | $ 63,800 |
United States |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Write down of property | 15,700 |  |
Disposed of by sale | United Kingdom |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gain on sale of real estate, net of tax | $ 36,000 |  |

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