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v3.20.2

Business Segments and Customer Information - Major Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | $ 168,715 | $ 189,111 | $ 346,133 | $ 359,030
DoD |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | 64,887 | 75,080 | 129,021 | 137,781
Other government |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | 63,666 | 54,855 | 109,656 | 108,514
Commercial |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | $ 40,162 | $ 59,176 | $ 107,456 | $ 112,735
Customer Concentration Risk | Sales Revenue, Net |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenue by customer | 100.00% | 100.00% | 100.00% | 100.00%
Customer Concentration Risk | Sales Revenue, Net | DoD |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenue by customer | 38.00% | 40.00% | 37.00% | 38.00%
Customer Concentration Risk | Sales Revenue, Net | Other government |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenue by customer | 38.00% | 29.00% | 32.00% | 31.00%
Customer Concentration Risk | Sales Revenue, Net | Commercial |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenue by customer | 24.00% | 31.00% | 31.00% | 31.00%

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