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Schedule of Other Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Mar. 31, 2017
Other Assets, Noncurrent      
Recoverable insurance losses $ 2,585 $ 2,405  
Deferred income tax assets   3,003  
Investments held for supplemental savings plan accounts 5,274 6,583  
Investments held for savings plans and SERP   6,583  
Long-term deposits 13,763 16,217  
Other 5,157 5,847  
Total other assets $ 26,779 $ 31,052  
Predecessor      
Other Assets, Noncurrent      
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