Annual report pursuant to Section 13 and 15(d)

Summary of Provision for Income Taxes from Continuing Operations (Detail)

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Summary of Provision for Income Taxes from Continuing Operations (Detail) - USD ($)
$ in Thousands
2 Months Ended 4 Months Ended 8 Months Ended 12 Months Ended
Sep. 12, 2016
Dec. 31, 2016
Sep. 12, 2016
Dec. 31, 2018
Dec. 31, 2017
Provisions for Income Taxes [Line Items]          
State       $ 500  
Income tax benefit       4,900  
Predecessor [Member]          
Provisions for Income Taxes [Line Items]          
Federal     $ 0    
Current income tax expense (benefit), total     0    
Federal     0    
State     0    
Deferred income tax benefit, total     0    
Income tax benefit     $ 0    
Successor [Member]          
Provisions for Income Taxes [Line Items]          
Federal   $ 0   (2,471) $ 0
Current income tax expense (benefit), total $ 0     (2,471) 0
Federal   0   2,471 (4,943)
State   0   523 0
Deferred income tax benefit, total   0   2,994 (4,943)
Income tax benefit   $ 0   $ 523 $ (4,943)