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Earnings Per Share (Details) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Sep. 24, 2011	Sep. 25, 2010	Sep. 24, 2011	Sep. 25, 2010
Numerator For Earnings Per Share Calculation [Abstract]
Net income	$ 15,117	$ 13,324	$ 30,559	$ 26,535
Preferred stock dividends	(68)	(45)	(129)	(91)
Income available to common shareholders	$ 15,049	$ 13,279	$ 30,430	$ 26,444
Denominator for earnings per common share calculation:
Weighted average common shares, basic	30,656,000	30,124,000	30,576,000	30,058,000
Effect of dilutive securities:
Preferred stock	760,000	760,000	760,000	760,000
Stock options	857,000	832,000	965,000	826,000
Weighted average number of common shares, diluted	32,273,000	31,716,000	32,301,000	31,644,000
Basic Earnings per common share:	$ 0.49	$ 0.44	$ 1.00	$ 0.88
Diluted Earnings per common share:	$ 0.47	$ 0.42	$ 0.95	$ 0.84
Antidilutive securities excluded from computation of earnings per share	686,000	270,000	687,000	272,000

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