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Equity Incentive Plans, RSU Activity (Details) - Restricted Stock Units [Member]
3 Months Ended
May 05, 2018
$ / shares
shares
Number of Shares [Roll Forward]  
Non-vested at beginning of period (in shares) | shares 207,346
Granted (in shares) | shares 62,869
Vested (in shares) | shares (50,645)
Non-vested at end of period (in shares) | shares 219,570
Weighted Average Grant Date Fair Value [Abstract]  
Non-vested at beginning of period (in dollars per share) | $ / shares $ 26.15
Granted (in dollars per share) | $ / shares 58.76
Vested (in dollars per share) | $ / shares 26.09
Non-vested at end of period (in dollars per share) | $ / shares $ 35.50
Minimum [Member]  
Equity Incentive Plans [Abstract]  
Vesting period 3 years
Cliff vesting period 1 year
Maximum [Member]  
Equity Incentive Plans [Abstract]  
Vesting period 4 years
Cliff vesting period 4 years