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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