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Franchise Rights Acquired, Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 01, 2016 | Jul. 02, 2016 | Oct. 03, 2015 | Oct. 01, 2016 | Oct. 03, 2015 | Jun. 27, 2016 | Jan. 02, 2016
Goodwill and Intangible Assets Disclosure |  |  |  |  |  |  |
Recruitment percentage for change in impairment review |  | 40.00% |  |  |  |  |
Franchise right maturity period |  |  |  | 7 years |  |  |
Goodwill | $ 167,638 |  |  | $ 167,638 |  |  | $ 159,331
Finite-lived intangible assets, aggregate amortization expense | $ 9,137 |  | $ 7,743 | $ 26,161 | $ 26,771 |  |
Weight Watchers of Greater Miami, Inc. |  |  |  |  |  |  |
Goodwill and Intangible Assets Disclosure |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 2,945 |
BRAZIL |  |  |  |  |  |  |
Goodwill and Intangible Assets Disclosure |  |  |  |  |  |  |
Reporting unit, percentage of fair value in excess of carrying amount | 10.00% |  |  | 10.00% |  |  |
Goodwill | $ 19,409 |  |  | $ 19,409 |  |  |
Franchise Rights | VPM |  |  |  |  |  |  |
Goodwill and Intangible Assets Disclosure |  |  |  |  |  |  |
Amortization period |  |  |  | 2 years |  |  |
Franchise Rights | Weight Watchers of Greater Miami, Inc. |  |  |  |  |  |  |
Goodwill and Intangible Assets Disclosure |  |  |  |  |  |  |
Amortization period |  |  |  | 3 months |  |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: 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=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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