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Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 28, 2014 | Sep. 29, 2013 | Sep. 28, 2014 Program | Sep. 29, 2013
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance and other restructuring costs | $ 9,158,000 | $ 3,800,000 | $ 48,809,000 | $ 9,500,000
Number of significant programs |  |  | 2 |
Additional severance and other restructuring costs and accelerated depreciation expense | 23,000,000 |  | 23,000,000 |
Broadcast Segment [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance and other restructuring costs |  | 3,200,000 |  | 7,600,000
Cost of sales [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance and other restructuring costs | 5,300,000 | 1,900,000 | 13,300,000 | 5,000,000
Selling, general and administrative expenses [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance and other restructuring costs | 2,600,000 | 1,600,000 | 32,600,000 | 3,200,000
Research and development [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Severance and other restructuring costs | $ 1,300,000 | $ 300,000 | $ 2,900,000 | $ 1,300,000

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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