Quarterly report pursuant to Section 13 or 15(d)

Stock-based compensation (Details)

v3.19.3
Stock-based compensation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Nov. 02, 2019
Nov. 03, 2018
Nov. 02, 2019
Nov. 03, 2018
Stock options        
Weighted-average assumptions to estimate fair value        
Volatility rate (as a percent)     31.00% 29.00%
Average risk-free interest rate (as a percent)     2.30% 2.40%
Average expected life     3 years 6 months 3 years 4 months 24 days
Dividend yield (as a percent)     0.00% 0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures     97 163
Compensation expense $ 2,204 $ 2,134 $ 6,523 $ 6,557
Weighted-average grant date fair value of options granted (in dollars per share)     $ 89.91 $ 50.10
Unrecognized compensation expense 18,105   $ 18,105  
Restricted stock units        
Weighted-average assumptions to estimate fair value        
Compensation expense 3,429 3,449 9,672 $ 9,244
Unrecognized compensation expense 24,383   $ 24,383  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     52 95
Performance-based restricted stock units        
Weighted-average assumptions to estimate fair value        
Compensation benefit 122      
Compensation expense   $ 1,904 $ 2,979 $ 5,083
Unrecognized compensation expense $ 7,793   $ 7,793  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     21 33