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NET INCOME PER SHARE - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Jul. 28, 2018	Jul. 29, 2017
Earnings Per Share [Abstract]
Numerator - Net Income	$ 23.7	$ 20.5
Denominator for basic net income per share-weighted average shares outstanding and vested/unissued restricted stock awards (in shares)	37,350,444	37,248,689
Dilutive potential common shares-employee and director stock options, restricted stock awards and restricted stock units (in shares)	287,058	312,551
Denominator for diluted net income per share (in shares)	37,637,502	37,561,240
Net Income per Share:
Basic (in dollars per share)	$ 0.63	$ 0.55
Diluted (in dollars per share)	$ 0.63	$ 0.55

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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