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Schedule of Tax Rate Applicable to Pre-Tax Earning, U.S. Federal Statutory Rate (Detail) - USD ($)
$ in Thousands
 4 Months Ended 5 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Mar. 31, 2017
Reconciliation Of Statutory Federal Tax Rate [Line Items]        
Computed “expected” tax expense   $ (12,840)    
Foreign income taxed at different rates   1,767    
Uncertain tax positions   (3,219)    
Transition tax   15,120    
Valuation allowance – deferred tax assets   (28,387)    
Amortization of deferrals associated with intercompany sales to foreign tax jurisdictions   11    
Foreign taxes   845    
Other, net   1,481    
Remeasurement of deferred taxes   27,261    
Income tax expense (benefit), Total   $ 2,039    
Predecessor        
Reconciliation Of Statutory Federal Tax Rate [Line Items]        
Computed “expected” tax expense $ (576,850)     $ (225,265)
Foreign income taxed at different rates 448,805     232,904
Uncertain tax positions 4,674     3,007
Chapter 11 reorganization 50,428      
Nondeductible transaction costs 2,628      
Transition tax       5,587
Valuation allowance – deferred tax assets 69,278     (2,377)
Amortization of deferrals associated with intercompany sales to foreign tax jurisdictions (822)     (3,860)
Foreign taxes (1,342)     (928)
State taxes 3     11
Other, net 1,964      
Remeasurement of deferred taxes       (2,682)
Income tax expense (benefit), Total $ (1,234)   $ 4,680 $ 6,397