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Income Taxes - Reconciliation of Uncertain Tax Positions Excluding Accrued Interest (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016
Income Tax Disclosure [Abstract] |  |  |
Gross uncertain tax positions at the beginning of the year | $ 2,679 | $ 2,633 | $ 2,620
Increase as a result of tax positions taken in the current period | 966 | 687 | 547
Reduction as a result of the expiration of the applicable statute of limitations | (1,359) | (641) | (534)
Gross uncertain tax positions at the end of the year | $ 2,286 | $ 2,679 | $ 2,633

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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