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Acquisitions - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended | 3 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2011 Litepoint Corporation | Oct. 05, 2011 Litepoint Corporation | Dec. 31, 2012 Litepoint Corporation Parent Company
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 646,047,000 | $ 646,047,000 |
Cash paid to acquire the outstanding common stock and preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 572,700,000 |
Acquisition of Litepoint, contingent consideration | 388,000 |  |  |  |  |  |  |  | 68,892,000 |  |  |  |  |  |  |  | 388,000 |  | 68,892,000 |  |  |  |  | 68,900,000 |
Fair value of assumed vested stock options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,500,000 |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 349,272,000 |  |
Total net revenues | 248,404,000 | [1],[2],[3] | 463,394,000 | [4] | 548,284,000 | [5] | 396,668,000 | [6] | 296,992,000 | [7],[8] | 344,389,000 | [9] | 410,519,000 | [10] | 377,161,000 | [11] | 1,656,750,000 |  | 1,429,061,000 |  | 1,566,162,000 |  | 28,400,000 |  |
Income (loss) from continuing operations before taxes | (30,285,000) | [1],[2],[3] | 103,025,000 | [4] | 151,992,000 | [5] | 41,244,000 | [6] | (15,549,000) | [7],[8] | 58,465,000 | [9] | 95,923,000 | [10] | 75,582,000 | [11] | 265,976,000 | [12],[13] | 214,421,000 | [12],[13] | 396,347,000 | [12],[13] | (20,600,000) |  |
Acquired inventory fair value adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,300,000
Transaction fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13,300,000
[1] | Restructuring and other, net includes a ($0.4) million fair value adjustment to decrease LitePoint acquisition contingent consideration.
[2] | In the fourth quarter ended December 31, 2012, we corrected prior period income tax provision (benefit) errors that resulted in a $0.2 million income tax provision. These errors were not individually or in aggregate material to the fourth quarter of 2012 or any prior period.
[3] | In the fourth quarter ended December 31, 2012, the change in recognizing pension and postretirement benefit plans expense, as a result of the mark-to-market adjustments, decreased gross profit and net income by $8.1 million and $18.3 million, respectively. See Note B: "Accounting Policies" for a discussion of our accounting policy.
[4] | Restructuring and other, net includes $0.7 million of severance charges related to the headcount reductions of 9 people, of which $0.5 million and 7 people were in Systems Test Group, $0.2 million and 2 people were in Wireless Test.
[5] | Restructuring and other, net includes $0.3 million of severance charges related to headcount reductions of 10 people in Semiconductor Test and ($6.5) million fair value adjustment to decrease the LitePoint acquisition contingent consideration.
[6] | Restructuring and other, net includes a ($1.8) million fair value adjustment to decrease the LitePoint acquisition contingent consideration.
[7] | Restructuring and other, net includes $0.5 million of charges related to pension settlement and $3.3 million to the acquisition of LitePoint.
[8] | In the fourth quarter ended December 31, 2011, the change in recognizing pension and postretirement benefit plans expense, as a result of the mark-to-market adjustments, decreased gross profit and net income by $2.4 million and $6.1 million, respectively. See Note B: "Accounting Policies" for a discussion of our accounting policy.
[9] | Restructuring and other, net includes $1.4 million of charges related to the acquisition of LitePoint.
[10] | Restructuring and other, net includes $0.3 million of severance charges related to headcount reductions of approximately 2 people in Semiconductor Test and $0.7 million related to pension settlement charges.
[11] | 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.
[12] | Interest income, interest expense and other, and pension and postretirement plans actuarial gains and losses are included in Corporate and Eliminations.
[13] | Included in income (loss) from continuing operations before taxes are charges and credits related to restructuring and other, net and inventory charges.

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