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Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2011 | Dec. 31, 2011 | Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations |  |  |  |
Net revenues |  |  | $ 9,086 | $ 42,488
Income from discontinued operation before income taxes | 1,278 | [1] | 1,278 | 5,406
Gain from disposal of discontinued operation before income taxes |  |  | 28,949 |
Income tax provision |  |  | 4,311 | 278
Income from discontinued operations |  |  | $ 25,916 | $ 5,128
[1] | Restructuring and other, net includes $0.8 million of severance charges related to headcount reductions of approximately 5 people in Semiconductor Test and $(0.4) million credit related to early exit of previously impaired leased facilities in Westford and North Reading, Massachusetts.

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