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Business Segments and Customer Information, Revenue by Customer (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Sep. 30, 2013
|
Sep. 30, 2012
|
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | $ 111,069 | $ 134,237 | $ 349,288 | $ 409,895 |
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U.S. Army/Army Reserve [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 22,868 | 41,317 | 82,622 | 126,124 |
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U.S. Navy [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 23,245 | 29,403 | 76,394 | 92,443 |
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U.S. Air Force [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 3,587 | 4,562 | 9,994 | 11,852 |
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Total Department of Defense [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 49,700 | 75,282 | 169,010 | 230,419 |
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U.S. Postal Service [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 36,122 | 31,192 | 104,950 | 98,816 |
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Department of Treasury [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 9,754 | 9,181 | 28,565 | 25,324 |
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Department of Interior [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 2,881 | 4,716 | 8,425 | 13,921 |
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Department of Energy [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 5,237 | 5,220 | 15,343 | 15,772 |
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Other government [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 6,985 | 7,825 | 21,451 | 23,218 |
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Total Federal civilian agencies [Member]
|
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | 60,979 | 58,134 | 178,734 | 177,051 |
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Commercial [Member]
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| Revenue, Major Customer [Line Items] | ||||
| Revenue, by customer | $ 390 | $ 821 | $ 1,544 | $ 2,425 |