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Divestments (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Mar. 19, 2019 | Mar. 31, 2019 | Jun. 30, 2019 | Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Investments in joint ventures |  |  | $ 19,222 | $ 0
Consumer Storage | Disposal Group, Not Discontinued Operations |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Gain on disposal |  | $ 4,200 |  |
Corporate Joint Venture | Makespace |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Investments in joint ventures | $ 20,000 |  |  |
Equity interest | 34.00% |  |  |
Equity method investment, fair value | $ 27,500 |  |  |
Carrying value of investment |  |  | $ 23,896 |

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