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Restructuring Charges Incurred by Segment and Cost Type (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Dec. 31, 2015
Restructuring Cost And Reserve [Line Items]    
Restructuring charges $ 7,600 $ 7,586 [1]
Americas | Crew Costs    
Restructuring Cost And Reserve [Line Items]    
Restructuring charges   3,410
Americas | Other Vessel Costs    
Restructuring Cost And Reserve [Line Items]    
Restructuring charges   203
Asia/Pacific | Crew Costs    
Restructuring Cost And Reserve [Line Items]    
Restructuring charges   $ 3,973
[1] Refer to Note (14) for additional information regarding the restructuring charge.