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Financial Instruments and Derivatives - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 05, 2015 | Jun. 29, 2014 | Jul. 05, 2015 | Jun. 29, 2014 | Dec. 31, 2014 | Jun. 11, 2015 | Oct. 31, 2014 | Dec. 31, 2013
Financial Instruments and Fair Value [Line Items] |  |  |  |  |  |  |  |
Available-for-sale securities, realized loss | $ 100,000 | $ 0 | $ 100,000 | $ 0 |  |  |  |
Available-for-sale securities, realized gain | 400,000 | 400,000 | 1,000,000 | 700,000 |  |  |  |
Contingent consideration | 15,092,000 |  | 15,092,000 |  | $ 895,000 |  |  |
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 118,408,000 |  | 118,408,000 |  | 583,076,000 |  |  |
Fair market value of investments with unrealized losses greater than one year | 200,000 |  | 200,000 |  | 2,300,000 |  |  |
Fair market value of investments with unrealized losses less than one year | 118,200,000 |  | 118,200,000 |  | 580,800,000 |  |  |
Gains (losses) on foreign currency transactions | (2,100,000) | 700,000 | 2,200,000 | 1,300,000 |  |  |  |
Realized gain(loss) on foreign currency contracts | 1,600,000 | $ (1,100,000) | (1,900,000) | $ (1,900,000) |  |  |  |
Offsetting foreign exchange contracts | 0 |  | 0 |  | 0 |  |  |
AIT | Maximum |  |  |  |  |  |  |  |
Financial Instruments and Fair Value [Line Items] |  |  |  |  |  |  |  |
Contingent consideration |  |  |  |  |  |  | $ 2,100,000 |
Universal Robots |  |  |  |  |  |  |  |
Financial Instruments and Fair Value [Line Items] |  |  |  |  |  |  |  |
Contingent consideration |  |  |  |  |  | $ 33,800,000 |  |
Universal Robots | Maximum |  |  |  |  |  |  |  |
Financial Instruments and Fair Value [Line Items] |  |  |  |  |  |  |  |
Contingent consideration |  |  |  |  |  |  |  | $ 65,000,000
Foreign Currency Forward Contracts |  |  |  |  |  |  |  |
Financial Instruments and Fair Value [Line Items] |  |  |  |  |  |  |  |
Notional amount of foreign currency forward contracts | $ 100,700,000 |  | 100,700,000 |  | 73,000,000 |  |  |
Gains (losses) on foreign currency transactions |  |  | $ (100,000) |  | $ (100,000) |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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