Business Segment Information - Additional Information (Details) |
12 Months Ended | ||
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Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
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| Various Governments | |||
| Segment Reporting Information [Line Items] | |||
| Concentration risk percentage | 80.00% | 80.00% | |
| Various Governments | Sales Revenue, Net | Customer Concentration Risk | |||
| Segment Reporting Information [Line Items] | |||
| Concentration risk percentage | 80.00% | ||
| U.S. Federal Government | Sales Revenue, Net | Customer Concentration Risk | |||
| Segment Reporting Information [Line Items] | |||
| Concentration risk percentage | 20.20% | 17.90% | 13.30% |
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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