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Subsequent Event - Additional Information (Detail) - USD ($)
6 Months Ended
Jul. 18, 2020
Jun. 30, 2020
Jun. 30, 2019
Subsequent Event [Line Items]      
Proceeds from disposal of assets   $ 1,071,000 $ 34,366,000
North Louisiana | Subsequent Event      
Subsequent Event [Line Items]      
Date of purchase sale agreement to sell assets Jul. 18, 2020    
Proceeds from disposal of assets $ 245,000,000.0    
North Louisiana | Subsequent Event | Contingent Consideration | Maximum      
Subsequent Event [Line Items]      
Proceeds from disposal of assets $ 90,000,000.0