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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2019 | Jun. 29, 2018 | Jun. 28, 2019 | Jun. 29, 2018
Income Tax Contingency [Line Items] |  |  |  |
Effective income tax rate | (6.30%) | (44.10%) | (1.70%) | (13.50%)
Federal statutory income tax rate |  | 21.00% | 21.00% |
Unrecognized Tax Benefits | $ 17,300 |  | $ 17,300 |
Unrecognized tax benefits that would impact the provision for income taxes | 16,000 |  | 16,000 |
Interest and possible penalties related to uncertain tax positions | $ 25 |  | 25 |
Unrecognized Tax Benefit Decrease |  |  | 700 |
One foreign subsidiary |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
One-time benefit due to valuation allowance release |  |  | $ 800 |

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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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