Earnings Per Share (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Earnings per share - Basic [Abstract]
Net earnings	$ 4,292,200	$ 4,206,500
Less: Distributed and undistributed earnings allocated to nonvested stock	(35,000)	(48,000)
Earnings available to common shareholders - Basic	4,257,000	4,159,000
Weighted average common shares outstanding - Basic (in shares)	8,069	7,867
Earnings per common share - Basic (in dollars per share)	$ 0.53	$ 0.53
Earnings per share - Diluted [Abstract]
Net earnings	4,292,200	4,206,500
Less: Distributed and undistributed earnings allocated to nonvested stock	(35,000)	(47,000)
Earnings available to common shareholders - Diluted	$ 4,257,000	$ 4,160,000
Weighted average common shares outstanding - Basic (in shares)	8,069	7,867
Effect of dilutive options (in shares)	248	373
Weighted average common shares outstanding - Diluted (in shares)	8,317	8,240
Earnings per common share - Diluted (in dollars per share)	$ 0.51	$ 0.51
Anti-dilutive equity awards not included above (in shares)	0	0