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Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Income Tax Disclosure [Abstract] |  |  |
Provision for Income Taxes at Statutory Rate (21% in 2019 and 2018 and 35% in 2017) | $ 14,474 | $ 16,701 | $ 20,179
Increases (Decreases) Resulting From: |  |  |
State income taxes, net of federal tax | (355) | 164 | 151
U.S. tax cost of foreign earnings | 146 | 1,215 | 761
Foreign tax rate differential | 2,584 | 3,158 | (3,747)
(Reversal of) provision for tax benefit reserves, net | (286) | (1,785) | 1,517
Change in valuation allowance | 81 | 141 | (341)
Nondeductible expenses | 2,454 | 781 | 1,177
Research and development tax credits | (381) | (445) | (297)
Excess tax benefit related to stock-based compensation | (3,352) | (967) | (581)
Impact of the U.S. Tax Cuts and Jobs Act | 0 | (106) | 7,093
Other | 993 | (375) | 158
Total income tax provision | $ 16,358 | $ 18,482 | $ 26,070

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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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