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Earnings Per Share EPS - Reconciliation of Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Net income
Basic earnings per share	$ 9,021	$ 3,168	$ 14,560	$ 6,944
Dilution associated with stock compensation plans	0	0	0	0
Diluted earnings per share	$ 9,021	$ 3,168	$ 14,560	$ 6,944
Shares
Basic earnings per share (in shares)	43,988	43,934	44,051	43,890
Dilution associated with stock compensation plans (in shares)	110	179	117	365
Diluted earnings per share (in shares)	44,098	44,113	44,168	44,255
Per share income
Basic earnings per share (in dollars per share)	$ 0.21	$ 0.07	$ 0.33	$ 0.16
Dilution associated with stock compensation plans (in dollars per share)	(0.01)	0.00	0.00	0.00
Diluted earnings per share (in dollars per share)	$ 0.20	$ 0.07	$ 0.33	$ 0.16

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Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of stock options or restrictive stock units (RSUs).

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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