Income per Share - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Aug. 01, 2020	Jul. 27, 2020	Jul. 27, 2019
Earnings Per Share [Abstract]
Net Income	$ 20.7	$ 28.3	$ 28.3
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Denominator for Basic Income per Share-Weighted Average Shares Outstanding and Vested/Unissued Restricted Stock Units	37,836,543		37,534,451
Dilutive Potential Common Shares-Employee Stock Options, Restricted Stock Awards and Restricted Stock Units (in shares)	321,875		132,603
Denominator for Diluted Income per Share	38,158,418		37,667,054
Basic and Diluted Income per Share:
Basic Income per Share (in dollars per share)	$ 0.55		$ 0.75
Diluted Income per Share (in dollars per share)	$ 0.54		$ 0.75
Number of Anti-dilutive Potentially Issuable Shares Excluded from Diluted Common Shares Outstanding	101,668		109,418