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Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Income Tax Disclosure [Abstract] |  |  |
Provision for Income Taxes at Statutory Rate | $ 20,179 | $ 15,592 | $ 17,279
Increases (Decreases) Resulting From: |  |  |
State income taxes, net of federal tax | 151 | 189 | 506
U.S. tax cost of foreign earnings | 761 | 192 | 455
Foreign tax rate differential | (3,747) | (3,921) | (3,852)
Provision for (reversal of) tax benefit reserves, net | 1,517 | (76) | 33
Change in valuation allowance | (341) | (131) | 99
Nondeductible expenses | 1,177 | 1,090 | 704
Research and development tax credits | (297) | (229) | (210)
Excess tax benefit related to share-based compensation | (581) | (553) | 0
Impact of the U.S. Tax Cuts and Jobs Act | 7,093 | 0 | 0
Other | 158 | (70) | (252)
Continuing Operations | $ 26,070 | $ 12,083 | $ 14,762

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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