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Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013
Income Taxes [Line Items] |  |  |
Income tax credits and adjustments |  |  | $ 1.0
Tax and accrued interest related to uncertain tax positions | $ (0.6) | $ (1.1) | $ (0.3)
Effective tax rate | 30.00% | 27.10% | 26.40%
Operating loss carryforwards, gross | $ 0.1 |  |
Indefinitely carryforward research and development credits | 4.5 |  |
Investment Tax Credit | 0.4 |  |
Estimated income tax benefit | 0.7 |  |
Deferred Tax Assets, Tax Credit Carryforwards, Research | 1.0 |  |
Foreign Tax Expense (Benefit), Business and Employment Actions | $ 1.3 | $ 1.6 | $ 1.2
Earnings Per Share, Diluted, Effect of Foreign Tax Benefit Relating to Business and Employment Actions | $ 0.02 | $ 0.03 | $ 0.02
Tax benefit from stock options exercised | $ 5.1 | $ 0.2 | $ 0.7
Deferred income taxes | 110.3 |  |
Additional income tax expense | 34.5 |  |
Amount of unrecognized benefits affecting future tax rate | 7.2 | 6.7 |
Penalties and interest related to unrecognized tax benefits | $ 1.1 | $ 0.9 | 0.9
Domestic Tax Authority | Variable Interest Entity, Primary Beneficiary [Member] |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance |  |  | $ 2.3

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