XML 61 R50.htm IDEA: XBRL DOCUMENT v3.4.0.3
Contingencies, Commitments and Other Circumstances - Additional Information (Detail)
4 Months Ended
Jan. 31, 2015
Plaintiff
Mar. 04, 2015
Complaint
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Commitment And Contingencies [Line Items]        
Face value of primarily performance bonds     $ 164,000,000  
Liability recognized for letters of credit       $ 0
Continuing Operations [Member]        
Commitment And Contingencies [Line Items]        
Outstanding letters of credit     $ 47,100,000  
In re Willbros Group, Inc. Securities Litigation [Member]        
Commitment And Contingencies [Line Items]        
Number of plaintiffs | Plaintiff 2      
Markovich v Harl et al And Kumararatne v. McNabb et al [Member]        
Commitment And Contingencies [Line Items]        
Number of complaints filed | Complaint   2