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Fair Value Measurements (Details 2) (KEYW Holding Corporation, USD $) In Millions, except Share data, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Sep. 30, 2012 | Dec. 31, 2011
KEYW Holding Corporation |  |
Schedule of Trading Security [Line Items] |  |
Number of shares owned in investee (in shares) |  | 1,900,000
Percentage of common stock owned |  | 7.00%
Amount of sale of owned shares | $ 14.0 |
Warrants |  |
Number of warrants owned (in shares) | 50,000 | 50,000
Exercise price of warrants (in dollars per share) | $ 9.25 | $ 9.25

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