Earnings Per Share (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 30, 2012	Dec. 25, 2011
Earnings per share - Basic [Abstract]
Net earnings	$ 5,398,700	$ 4,773,600	$ 14,874,100	$ 12,888,000
Less: Distributed and undistributed earnings allocated to nonvested stock	(61,000)	(69,000)	(167,000)	(187,000)
Earnings available to common shareholders - Basic	5,338,000	4,705,000	14,707,000	12,701,000
Weighted average common shares outstanding - Basic (in shares)	7,947	7,657	7,916	7,625
Earnings per common share - Basic (in dollars per share)	$ 0.67	$ 0.61	$ 1.86	$ 1.67
Earnings per share - Diluted [Abstract]
Net earnings	5,398,700	4,773,600	14,874,100	12,888,000
Less: Distributed and undistributed earnings allocated to nonvested stock	(61,000)	(67,000)	(165,000)	(181,000)
Earnings available to common shareholders - Diluted	$ 5,338,000	$ 4,707,000	$ 14,709,000	$ 12,707,000
Weighted average common shares outstanding - Basic (in shares)	7,947	7,657	7,916	7,625
Effect of dilutive options (in shares)	272	378	261	325
Weighted average common shares outstanding - Diluted (in shares)	8,219	8,035	8,177	7,950
Earnings per common share - Diluted (in dollars per share)	$ 0.65	$ 0.59	$ 1.80	$ 1.60
Anti-dilutive equity awards not included above (in shares)	0	0	0	0