The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 350

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-Section 50

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Goodwill and other intangible assets, net - additional information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 15,500	$ 15,000	$ 45,278	$ 47,053
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	58,908		58,908		$ 68,694
In Process Research and Development \| Semprus Technology
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 41,000		$ 41,000