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ACQUISITIONS - Unaudited Pro Forma Financial Information (Details 1) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014
L-3 National Security Solutions, Inc. and L-3 Data Tactics Corporation ("NSS") |  |  |
Business Acquisition [Line Items] |  |  |
Revenue | $ 4,418,997 | $ 4,401,345 |
Net income (loss) | $ (300,363) | $ (15,480) |
Basic earnings (loss) per share (in dollars per share) | $ (12.38) | $ (0.65) |
Diluted earnings (loss) per share (in dollars per share) | $ (12.38) | $ (0.65) |
Six3 Systems Holdings II Inc |  |  |
Business Acquisition [Line Items] |  |  |
Revenue |  |  | $ 3,742,394
Net income (loss) |  |  | $ 150,881
Basic earnings (loss) per share (in dollars per share) |  |  | $ 6.44
Diluted earnings (loss) per share (in dollars per share) |  |  | $ 6.00

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