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Acquisitions - Narrative (Details) - USD ($) $ in Thousands |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 03, 2024 | Apr. 24, 2024 | Sep. 27, 2023 | Jul. 03, 2023 | Feb. 01, 2023 | Dec. 31, 2024 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 491,453 |  | $ 491,453 | $ 351,781 | $ 217,262
Measurement period adjustments |  |  |  |  |  |  |  | (1,132) |  |
Propriety Solutions |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Consideration on disposal |  |  |  | $ 31,800 |  |  |  |  |  |
Turbine Controls, Inc. ("TCI") |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Consideration transferred |  | $ 122,400 |  |  |  |  |  |  |  |
Purchase price |  | 112,400 |  |  |  |  |  |  |  |
Business combination, working capital adjustment |  | 1,500 |  |  |  |  |  |  |  |
Acquisition-related expenses |  |  |  |  |  |  |  | 2,200 |  |
Revenue |  |  |  |  |  |  |  | 84,400 |  |
Operating income |  |  |  |  |  |  |  | $ 7,100 |  |
Goodwill |  | 40,201 |  |  |  |  |  |  |  |
Turbine Controls, Inc. ("TCI") | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Useful life (in years) |  |  |  |  |  |  |  | 10 years |  |
Turbine Controls, Inc. ("TCI") | Common Stock |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Share consideration, VSE common stock |  | $ 10,000 |  |  |  |  |  |  |  |
Kellstrom Aerospace Group, Inc |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Consideration transferred | $ 191,000 |  |  |  |  |  |  |  |  |
Purchase price | 170,800 |  |  |  |  |  |  |  |  |
Acquisition-related expenses |  |  |  |  |  |  |  | $ 2,700 |  |
Revenue |  |  |  |  |  | 17,000 |  |  |  |
Operating income |  |  |  |  |  | $ 1,200 |  |  |  |
Goodwill | 100,711 |  |  |  |  |  |  |  |  |
Kellstrom Aerospace Group, Inc | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Useful life (in years) |  |  |  |  |  |  |  | 8 years |  |
Kellstrom Aerospace Group, Inc | Common Stock |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Share consideration, VSE common stock | $ 20,300 |  |  |  |  |  |  |  |  |
Precision Fuel |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  | $ 11,700 |  |  |  |  |
Acquisition-related expenses |  |  |  |  |  |  |  |  | 200 |
Desser Aerospace |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  | 99,700 |  |  |  |  |  |
Purchase price |  |  |  | 131,500 |  |  |  |  |  |
Acquisition-related expenses |  |  |  |  |  |  |  |  | 3,200 |
Goodwill |  |  |  | $ 53,942 |  |  |  |  |  |
Measurement Period Adjustments, Deferred tax liabilities |  |  |  |  |  |  |  | $ 1,600 |  |
Measurement period adjustments |  |  |  |  |  |  |  | (1,700) |  |
Increase (decrease) inventories |  |  |  |  |  |  |  | $ 100 |  |
Desser Aerospace | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Useful life (in years) |  |  |  |  |  |  |  | 8 years 3 months 18 days |  |
Honeywell International |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  | $ 105,000 |  |  |  |  |  |  |
Acquisition-related expenses |  |  |  |  |  |  |  |  | $ 300 |
Goodwill |  |  | $ 74,586 |  |  |  |  |  |  |
Measurement period adjustments |  |  |  |  |  |  | $ (500) |  |  |
Decrease in other tangible assets |  |  |  |  |  |  | $ (500) |  |  |
Honeywell International | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets, remaining amortization period (in years) |  |  | 10 years |  |  |  |  |  |  |

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