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Restructuring and Related Charges - Activities in Restructuring Accrual (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jul. 01, 2016 | Jun. 30, 2017 | Jul. 01, 2016
Restructuring Reserve [Roll Forward] |  |  |  |  |
Adjustments to restructuring provisions |  | $ 777 | $ 1,903 | $ 2,056 | $ 4,515
Harmonic 2016 Restructuring Plan [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning Balance |  |  |  | 13,544 |
Restructuring charges |  |  |  | 2,798 |
Adjustments to restructuring provisions |  |  |  | 44 |
Cash payments |  |  |  | (7,605) |
Foreign exchange gain (loss) |  |  |  | 628 |
Ending Balance |  | 9,409 |  | 9,409 |
Restructuring Reserve, Current | [1] | (5,269) |  | (5,269) |
Restructuring Reserve, Noncurrent | [1] | 4,140 |  | 4,140 |
Harmonic 2016 Restructuring Plan [Member] | Facility Closing [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning Balance |  |  |  | 2,375 |
Restructuring charges |  |  |  | 48 |
Adjustments to restructuring provisions |  |  |  |  |
Cash payments |  |  |  | (676) |
Ending Balance |  | 1,747 |  | 1,747 |
Restructuring Reserve, Current | [1] | (854) |  | (854) |
Restructuring Reserve, Noncurrent | [1] | 893 |  | 893 |
Harmonic 2016 Restructuring Plan [Member] | TVN Voluntary Departure Plan [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning Balance | [2] |  |  | 9,650 |
Restructuring charges | [2] |  |  | 1,777 |
Adjustments to restructuring provisions | [2] |  |  |  |
Cash payments | [2] |  |  | (4,862) |
Foreign exchange gain (loss) | [2] |  |  | 597 |
Ending Balance | [2] | 7,162 |  | 7,162 |
Restructuring Reserve, Current | [1],[2] | (3,915) |  | (3,915) |
Restructuring Reserve, Noncurrent | [1],[2] | 3,247 |  | 3,247 |
Harmonic 2016 Restructuring Plan [Member] | Employee Severance [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning Balance | [3] |  |  | 1,519 |
Restructuring charges | [3] |  |  | 973 |
Adjustments to restructuring provisions | [3] |  |  | 44 |
Cash payments | [3] |  |  | (2,067) |
Foreign exchange gain (loss) | [3] |  |  | 31 |
Ending Balance | [3] | 500 |  | 500 |
Restructuring Reserve, Current | [1],[3] | (500) |  | (500) |
Restructuring Reserve, Noncurrent | [1],[3] | $ 0 |  | $ 0 |
[1] | The current portion and long-term portion of the restructuring liability are reported under “Accrued and other current liabilities” and “Other non-current liabilities”, respectively, on the Company’s Condensed Consolidated Balance Sheets.
[2] | See discussion of the TVN VDP above for future estimated payments through 2020.
[3] | The Company anticipates that the remaining severance and benefits accrual at June 30, 2017 will be fully paid in 2017.

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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 FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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