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Income Taxes (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Summary of income tax reconciliation |  |  |
Provision computed at federal statutory income tax rate | $ 79,042 | $ 110,266 | $ 83,003
State and local income tax, net of federal tax effect | 15,540 | 5,867 | 5,534
Foreign income tax rate differential | (37,031) | (65,296) | (36,098)
Deemed repatriation transition tax | (1,409) | 67,188 | 0
Remeasurement of U.S. deferred tax assets and liabilities | 0 | 25,200 | 0
U.S. tax on foreign entities | 28,846 | 0 | 0
Stock-based compensation | (13,539) | (24,455) | (13,132)
Change in deferred tax asset valuation allowance | 13,234 | 4,689 | 1,243
Tax credits | (72,815) | (26,789) | (39,765)
Repatriation of foreign earnings | 0 | 0 | 25,145
Non-deductible research and development expense | 4,700 | 0 | 0
Tax effects of intra-entity transfer of assets | 79 | (8,450) | (7,661)
Domestic production activity deduction | 0 | (2,474) | (2,826)
Withholding taxes | 11,535 | 11,225 | 9,870
Tax settlements, foreign | 0 | 3,086 | 5,620
Increase in unrecognized tax benefits not included in tax settlements | (1,545) | 4,054 | 614
Other | 3,976 | 6,834 | 2,520
Total provision for income taxes | $ 30,613 | $ 110,945 | $ 34,067
Effective tax rate | 8.00% | 35.00% | 14.00%

X
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e32123-109318 + Details
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