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Stock-Based Compensation - Restricted Stock Units Unvested Roll Forward (Detail) - Restricted Stock Units (RSUs) [Member]
shares in Thousands
3 Months Ended
Apr. 03, 2021
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Unvested Beginning balance, Shares | shares 271
Shares, Granted | shares 76
Shares, Vested | shares (80)
Shares, Forfeited | shares (3)
Unvested Ending balance, Shares | shares 264
Weighted-average grant date fair value per share of shares unvested at beginning of period | $ / shares $ 202.00
Weighted-average grant date fair value per share of shares granted | $ / shares 279.66
Weighted-average grant date fair value per share of shares vested | $ / shares 182.14
Weighted-average grant date fair value of shares forfeited | $ / shares 210.35
Weighted-average grant date fair value per share of shares unvested at end of period | $ / shares $ 230.28