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Schedule of Segment Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 29, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue | $ 285,301 | [1],[2] | $ 433,376 | $ 428,889 | $ 280,367 | $ 248,404 | [3],[4] | $ 463,394 | $ 548,284 | [5] | $ 396,668 | [6] | $ 1,427,933 | [7] | $ 1,656,750 | [7] | $ 1,429,061 | [7]
Income (loss) from continuing operations before taxes | 35,439 | [1],[2] | 87,552 | 80,357 | (1,426) | (30,285) | [3],[4] | 103,025 | 151,992 | [5] | 41,244 | [6] | 201,922 | [8],[9] | 265,976 | [8],[9] | 214,421 | [8],[9]
Total assets | 2,629,824 | [10] |  |  |  | 2,429,345 | [10] |  |  |  |  |  | 2,629,824 | [10] | 2,429,345 | [10] | 2,188,639 | [10]
Property additions |  |  |  |  |  |  |  |  |  |  |  |  | 106,731 |  | 119,080 |  | 86,097 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  |  |  | 150,687 |  | 145,514 |  | 106,681 |
Semiconductor Test |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  |  |  | 1,023,041 |  | 1,127,726 |  | 1,106,191 |
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  |  |  |  |  | 153,797 | [8],[9] | 185,985 | [8],[9] | 219,651 | [8],[9]
Total assets | 632,840 | [10] |  |  |  | 604,127 | [10] |  |  |  |  |  | 632,840 | [10] | 604,127 | [10] | 581,026 | [10]
Property additions |  |  |  |  |  |  |  |  |  |  |  |  | 94,303 |  | 105,074 |  | 80,606 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  |  |  | 72,472 |  | 73,537 |  | 74,278 |
Wireless Test |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  |  |  | 251,871 |  | 286,355 |  | 28,390 |
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  |  |  |  |  | 23,153 | [8],[9] | 83,077 | [8],[9] | (20,579) | [8],[9]
Total assets | 645,001 | [10] |  |  |  | 672,048 | [10] |  |  |  |  |  | 645,001 | [10] | 672,048 | [10] | 725,940 | [10]
Property additions |  |  |  |  |  |  |  |  |  |  |  |  | 5,358 |  | 7,608 |  | 794 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  |  |  | 51,675 |  | 50,362 |  | 13,057 |
System Test |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  |  |  |  |  | 153,021 |  | 242,669 |  | 294,480 |
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  |  |  |  |  | 3,115 | [8],[9] | 34,164 | [8],[9] | 53,298 | [8],[9]
Total assets | 79,983 | [10] |  |  |  | 71,116 | [10] |  |  |  |  |  | 79,983 | [10] | 71,116 | [10] | 77,277 | [10]
Property additions |  |  |  |  |  |  |  |  |  |  |  |  | 7,070 |  | 6,398 |  | 4,697 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  |  |  | 5,180 |  | 4,549 |  | 4,192 |
Corporate And Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  |  |  |  |  | 21,857 | [8],[9] | (37,250) | [8],[9] | (37,949) | [8],[9]
Total assets | 1,272,000 | [10] |  |  |  | 1,082,054 | [10] |  |  |  |  |  | 1,272,000 | [10] | 1,082,054 | [10] | 804,396 | [10]
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  |  |  | $ 21,360 |  | $ 17,066 |  | $ 15,154 |
[1] | Interest expense and other includes a $34.2 million gain from the sale of an equity investment.
[2] | In the fourth quarter ended December 31, 2013, pension and post retirement net actuarial gains increased gross profit and net income by $2.7 million and $9.1 million, respectively. See Note B: "Accounting Policies" for a discussion of our accounting policy.
[3] | 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.
[4] | In the fourth quarter ended December 31, 2012, pension and postretirement actuarial losses 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.
[5] | Restructuring and other 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 includes a ($1.8) million fair value adjustment to decrease the LitePoint acquisition contingent consideration.
[7] | Revenues attributable to a country are based on location of customer site.
[8] | Interest income, interest expense and other, and pension and postretirement plans actuarial gains and losses are included in Corporate and Eliminations.
[9] | Included in income (loss) from continuing operations before taxes are charges and credits related to restructuring and other and inventory charges.
[10] | Total business assets are directly attributable to each business. Corporate assets consist of cash and cash equivalents, marketable securities and certain other assets.

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