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Income per Share - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Oct. 30, 2021
Oct. 31, 2020
Oct. 30, 2021
Oct. 31, 2020
Earnings Per Share [Abstract]        
Net income $ 27.5 $ 38.6 $ 56.6 $ 59.3
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]        
Denominator for basic income per share - weighted average shares outstanding and vested/unissued restricted stock units 37,544,357 38,106,793 37,741,923 37,971,668
Dilutive potential common shares 538,899 20,745 528,684 171,310
Denominator for diluted income per share 38,083,256 38,127,538 38,270,607 38,142,978
Basic and diluted income per share:        
Basic Income per Share (in dollars per share) $ 0.73 $ 1.01 $ 1.50 $ 1.56
Diluted Income per Share (in dollars per share) $ 0.72 $ 1.01 $ 1.48 $ 1.56
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 928,412 1,017,000 928,412 559,334