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Schedule of Other Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Mar. 31, 2017
Other Assets, Noncurrent [Abstract]    
Recoverable insurance losses $ 2,405  
Deferred income tax assets 3,003  
Investments held for savings plans and SERP 6,583  
Long-term deposits 16,217  
Other 5,847  
Total other assets $ 31,052  
Predecessor    
Other Assets, Noncurrent [Abstract]    
Recoverable insurance losses   $ 10,142
Deferred income tax assets   39,134
Investments held for savings plans and SERP   14,835
Accumulated costs of rejected vessel   48,382
Long-term deposits   15,162
Other   11,880
Total other assets   $ 139,535