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Schedule of Other Assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Mar. 31, 2017
Other Assets, Noncurrent [Abstract]    
Recoverable insurance losses $ 2,540  
Savings plans and SERP 15,174  
Accumulated costs of rejected vessel [1] 7,007  
Restricted cash and long-term deposits 15,761  
Other 6,363  
Total other assets $ 46,845  
Predecessor    
Other Assets, Noncurrent [Abstract]    
Recoverable insurance losses   $ 10,142
Deferred income tax assets   39,134
Savings plans and SERP   14,835
Accumulated costs of rejected vessel [1]   48,382
Restricted cash and long-term deposits   15,162
Other   11,880
Total other assets   $ 139,535
[1] Refer to Note (10) of Notes to Condensed Consolidated Financial Statements for additional information regarding the vessel rejected at the time of delivery.