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Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2019 | Mar. 29, 2019 | Jun. 29, 2018 | Mar. 30, 2018 | Jun. 28, 2019 | Jun. 29, 2018
Cash paid during period: |  |  |  |  |  |
Income taxes |  |  |  |  | $ 5,972 | $ 12,217
Non-cash investing and financing activities: |  |  |  |  |  |
Unrealized gain (loss) on short-term investments | $ 249 | $ 154 | $ 19 | $ (40) | 403 | (21)
Vested stock unit awards issued to settle accrued bonuses |  |  |  |  | 7,947 | 7,643
Accrual for capital expenditures |  |  |  |  | 1,978 | $ 691
Right-of-use asset obtained in exchange for operating lease obligations |  |  |  |  | $ 26,152 |

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