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Divestiture of Assets - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Apr. 16, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Divestiture Of Assets [Line Items]        
Loss (gain) on disposition of assets   $ 7,233 $ (4,664) $ (15,095)
Puerto Rico [Member]        
Divestiture Of Assets [Line Items]        
Non-cash consideration consisting of note receivable $ 9,250      
Cash on sale of assets $ 3,000      
Loss (gain) on disposition of assets   $ 7,809