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Income Taxes (Tables) | 9 Months Ended
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Sep. 29, 2018
Income Tax Disclosure [Abstract] |
Summary of Differences Between U.S. Federal Statutory Tax Rate and Company's Consolidated Effective Tax Rate | The differences between the U.S. federal statutory tax rate and the Company’s consolidated effective tax rate is as follows:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 29, |  |  | September 30, |  |  | September 29, |  |  | September 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
U.S. federal statutory tax rate |  |  | 21.0 | % |  |  | 35.0 | % |  |  | 21.0 | % |  |  | 35.0 | %
State income taxes (net of federal benefit) |  |  | (0.6 | %) |  |  | 0.5 | % |  |  | 1.1 | % |  |  | 1.5 | %
Cessation of operations |  |  | 0.0 | % |  |  | 0.0 | % |  |  | (0.9 | %) |  |  | (8.5 | %)
Research and development credit |  |  | (0.3 | %) |  |  | (2.1 | %) |  |  | (0.3 | %) |  |  | (2.2 | %)
Tax (windfall) shortfall on share-based awards |  |  | (3.0 | %) |  |  | (0.9 | %) |  |  | (12.4 | %) |  |  | 0.0 | %
Tax return adjustments related to the 2017 Tax Act |  |  | (3.3 | %) |  |  | 0.0 | % |  |  | (1.3 | %) |  |  | 0.0 | %
Reserve for uncertain tax positions |  |  | (4.6 | %) |  |  | (4.5 | %) |  |  | (1.8 | %) |  |  | (1.7 | %)
Increase in valuation allowance due to net operating loss |  |  | (0.1 | %) |  |  | 1.1 | % |  |  | 0.2 | % |  |  | 3.0 | %
Impact of Foreign Ops |  |  | 4.2 | % |  |  | 0.0 | % |  |  | 3.2 | % |  |  | 0.0 | %
Other |  |  | 1.7 | % |  |  | 1.4 | % |  |  | 1.0 | % |  |  | (0.5 | %)
Total effective tax rate |  |  | 15.0 | % |  |  | 30.5 | % |  |  | 9.8 | % |  |  | 26.6 | %

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: 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 + Details
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