Revenue and Contract Costs - Pass Through Costs (Details) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
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| Contractors [Abstract] | ||||
| Pass-through costs as a percentage of revenues | 48.40% | 33.80% | 45.30% | 35.00% |
| X | ||||||||||
- Definition Pass through costs as percent of revenue No definition available.
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| X | ||||||||||
- References No definition available.
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