Earnings Per Common Share (Reconciliation Of Basic And Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 23, 2017	Sep. 24, 2016	Sep. 23, 2017		Sep. 24, 2016
Numerator for earnings per common share calculation:
Net income	$ 17,267	$ 17,544	$ 34,852		$ 34,299
Preferred stock dividends	(92)	(129)	(184)	[1]	(258)
Income available to common stockholders	$ 17,175	$ 17,415	$ 34,668		$ 34,041
Denominator for earnings per common share calculation:
Weighted average common shares, basic	32,754	32,291	32,729		32,274
Effect of dilutive securities:
Preferred stock	510	760	510		760
Stock options	45	266	61		292
Weighted average number of common shares, diluted	33,309	33,317	33,300		33,326
Basic earnings per common share:	$ 0.52	$ 0.54	$ 1.06		$ 1.05
Diluted earnings per common share:	$ 0.52	$ 0.53	$ 1.05		$ 1.03

[1] Represents first and second quarter fiscal year 2018 dividends of $.18 per common share or common share equivalent each quarter, declared on May 18, 2017 and August 15, 2017, respectively.