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Assets Held for Sale - Additional Information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) crane | Sep. 30, 2019 USD ($)
Long Lived Assets Held-for-sale [Line Items] |  |  |  |
Gain (loss) on sale of assets |  |  | $ 5 | $ 565
Held for sale |  |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |  |
Number of cranes | crane |  |  | 3 |
Proceeds from the sale of assets held for sale | $ 600 |  | $ 1,700 | 400
Gain (loss) on sale of assets | $ (100) |  | $ (100) | 400
Impairment of long-lived assets to be disposed of |  | $ 300 |  | $ 600

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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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