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Asset Dispositions, Asset Held for Sale and Asset Impairments - Additional Information (Detail) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 USD ($) Vessel | Dec. 31, 2019 USD ($) Vessel | Mar. 31, 2019 USD ($) Vessel | Dec. 31, 2019 USD ($) Vessel
Long Term Purchase Commitment [Line Items] |  |  |  |
Long-lived asset impairments | $ | $ 10,207 | $ 26,700 |  |
Remaining net book value of assets held for sale | $ | $ 10,200 | $ 39,300 |  | $ 39,300
Number of vessels held for sale |  |  |  | 46
Number of vessels designated to be scrapped |  |  |  | 20
Number of vessels valued under sales agreements | 4 |  |  |
Percentage reduction in the value of vessels | 10.00% |  |  |
Stacked and Active Vessels |  |  |  |
Long Term Purchase Commitment [Line Items] |  |  |  |
Number of vessels stacked |  | 42 |  |
Number of vessels sold | 8 | 61 | 16 |
Number of vessels designated for sale |  | 4 |  | 4
Gains recognized on sale of vessels | $ | $ 5,300 |  | $ 1,300 |

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