XML 120 R109.htm IDEA: XBRL DOCUMENT v3.10.0.1
Commitments and Contingencies (Details) - USD ($)
$ in Millions
2 Months Ended 9 Months Ended
Oct. 31, 2016
Sep. 30, 2018
Dec. 31, 2017
Nov. 06, 2014
Loss Contingencies [Line Items]        
Common stock, shares issued (in shares)   45,188,169 44,570,004  
Global Marine Dispute        
Loss Contingencies [Line Items]        
Damages incurred (in excess of) $ 38.2      
Invoices rejected   $ 17.0    
Loss contingency, damages paid   8.1    
Loss contingency accrual   $ 8.9    
Global Marine Dispute | Liquidated Damages        
Loss Contingencies [Line Items]        
Damages incurred (in excess of) $ 1.2      
DBMG        
Loss Contingencies [Line Items]        
Common stock, shares issued (in shares)       721,000