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Asset Impairments - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Asset Impairment Charges [Abstract]        
Impairments charges $ 0   $ 0  
Asset impairments [1] $ 5,224 $ 16,853 $ 5,224 $ 24,254
[1] Refer to Note (14) for additional information regarding asset impairment charges.