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Restructuring and Related Charges - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |
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Sep. 27, 2013 | Sep. 28, 2012 | Sep. 27, 2013 | Sep. 28, 2012 | Sep. 27, 2013 HFC business [Member] | Sep. 27, 2013 HFC business [Member] Employee | Dec. 31, 2012 HFC business [Member] | Sep. 27, 2013 HFC business [Member] Employee Severance And Benefit Arrangements [Member] | Dec. 31, 2012 HFC business [Member] Employee Severance And Benefit Arrangements [Member] | Sep. 27, 2013 HFC business [Member] Contract termination [Member] | Dec. 31, 2012 HFC business [Member] Contract termination [Member] | Sep. 27, 2013 Harmonic 2013 Restructuring [Member] | Sep. 27, 2013 Harmonic 2013 Restructuring [Member] Employee | Dec. 31, 2012 Harmonic 2013 Restructuring [Member] | Sep. 27, 2013 Harmonic 2013 Restructuring [Member] Product cost of revenue [Member] | Sep. 27, 2013 Harmonic 2013 Restructuring [Member] Operating expense [Member] | Sep. 27, 2013 Harmonic 2013 Restructuring [Member] Employee Severance And Benefit Arrangements [Member] | Dec. 31, 2012 Harmonic 2013 Restructuring [Member] Employee Severance And Benefit Arrangements [Member] | Sep. 27, 2013 Harmonic 2013 Restructuring [Member] Leasehold Improvements [Member] | Dec. 31, 2012 Harmonic 2013 Restructuring [Member] Leasehold Improvements [Member] | Sep. 27, 2013 Harmonic 2013 Restructuring [Member] Obsolete Inventory [Member] | Dec. 31, 2012 Harmonic 2013 Restructuring [Member] Obsolete Inventory [Member]
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discontinued Operation Restructuring Expense |  |  |  |  | $ 16 | $ 617 |  | $ 522 |  | $ 95 |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges | 259 | 0 | 925 | 0 |  |  |  |  |  |  |  | 600 | 1,500 |  | 530 | 925 | 1,200 |  |  |  |  |
Number of termination of employees |  |  |  |  |  | 9 |  |  |  |  |  |  | 63 |  |  |  |  |  |  |  |  |
Number Of Employees Terminated Required to be Hired |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of terminated employees required to work end of TSA Period |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve |  |  |  |  | 30 | 30 | 0 | 30 | 0 | 0 | 0 | 95 | 95 | 0 |  |  | 95 | 0 | 0 | 0 | 0 | 0
Non-cash write-offs |  |  |  |  |  |  |  |  |  |  |  |  | $ 300 |  |  |  | $ 0 |  | $ 149 |  | $ 151 |

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- Definition Amount charged against earnings under Income from Discontinued Operations in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, including subsequent restructuring expenses adjustment and excluding asset retirement obligations. + References No definition available. + Details
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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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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: 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 2: 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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