Commitments and Contingencies - Narrative (Details) $ in Thousands  | 
6 Months Ended | |
|---|---|---|
| 
 Apr. 19, 2018  
subcontractor 
 | 
 Jun. 30, 2019  
USD ($) 
 | 
|
| Loss Contingencies [Line Items] | ||
| Cash payments | $ 3,200 | |
| Weighted average remaining lease term | 6 years 12 months 18 days | |
| Weighted average discount rate, percent | 6.00% | |
| Lease not yet commenced | $ 300 | |
| Lease not yet commenced, lease term | 3 years | |
| Joseph Waggoner v VSE re Overtime Compensation | ||
| Loss Contingencies [Line Items] | ||
| Number of subcontractors | subcontractor | 2 | |
| Minimum | ||
| Loss Contingencies [Line Items] | ||
| Lease term | 2 years | |
| Maximum | ||
| Loss Contingencies [Line Items] | ||
| Lease term | 15 years | 
| X | ||||||||||
- Definition Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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- Definition Lessee, Operating Lease, Lease Not yet Commenced No definition available. 
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- Definition Loss Contingency, Number of Subcontractors No definition available. 
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- Details 
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- Details 
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