Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Narrative (Details)

v3.20.1
Commitments and Contingencies - Narrative (Details)
$ in Millions
12 Months Ended
Apr. 19, 2018
subcontractor
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Loss Contingencies [Line Items]        
Sublease rentals     $ 2.2 $ 3.8
Cash payments   $ 5.7    
Weighted average remaining lease term   6 years 7 months 18 days    
Weighted average discount rate, percent   6.00%    
Operating Leases | Minimum        
Loss Contingencies [Line Items]        
Lease term   2 years    
Operating Leases | Maximum        
Loss Contingencies [Line Items]        
Lease term   15 years    
Joseph Waggoner v VSE re Overtime Compensation        
Loss Contingencies [Line Items]        
Number of subcontractors named in lawsuit | subcontractor 2