XML 165 R145.htm IDEA: XBRL DOCUMENT v3.8.0.1
Segment Information, Geographical Data and Major Customers (Parenthetical) (Detail) - USD ($)
$ in Thousands
 4 Months Ended 5 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2017
Dec. 31, 2017
Dec. 31, 2017
Mar. 31, 2017
Segment Reporting Information [Line Items]        
General and administrative expenses   $ 46,619    
Corporate Vessels        
Segment Reporting Information [Line Items]        
Construction costs     $ 9,300  
Predecessor        
Segment Reporting Information [Line Items]        
General and administrative expenses $ 41,832     $ 145,879
Predecessor | Corporate Vessels        
Segment Reporting Information [Line Items]        
Construction costs 47,500     52,400
Corporate        
Segment Reporting Information [Line Items]        
General and administrative expenses [1]   $ 14,823    
Corporate | Predecessor        
Segment Reporting Information [Line Items]        
General and administrative expenses [1] 17,542     55,389
Corporate | Predecessor | Troms Offshore Supply AS        
Segment Reporting Information [Line Items]        
General and administrative expenses $ 6,700     $ 29,000
[1] Restructuring-related professional services costs for the five month period from August 1, 2017 through December 31, 2017 are included in reorganization items. Included in corporate general and administrative expenses for the period four month period April 1, 2017 through July 31, 2017 (Predecessor) and year ended March 31, 2017 (Predecessor) were $6.7 million and $29 million of restructuring-related professional service costs, respectively.