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Net Income Per Share - Schedule of Weighted-Average Shares Used for Net Income per Share (Detail) - shares
3 Months Ended
May 04, 2019
May 05, 2018
Earnings Per Share [Abstract]    
Weighted-average shares-basic 19,976,858 21,545,025
Effect of dilutive stock-based awards 4,472,545 3,685,203
Effect of dilutive convertible senior notes [1] 484,584  
Weighted-average shares-diluted 24,933,987 25,230,228
[1] The 2019 Notes, 2020 Notes and 2023 Notes have an impact on the Company’s dilutive share count beginning at stock prices of $116.09 per share, $118.13 per share and $193.65 per share, respectively