Net Income Per Share - Anti-Dilutive Securities Excluded from Diluted Net Income per Share (Detail) - shares	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options and restricted stock units were excluded from calculation of diluted net earnings share	535,306	1,013,410	865,733
Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options and restricted stock units were excluded from calculation of diluted net earnings share	522,390	1,009,157	774,745
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options and restricted stock units were excluded from calculation of diluted net earnings share	12,916	4,253	90,988