Earnings Per Share (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Earnings per share - Basic [Abstract]
Net earnings	$ 3,513,600	$ 4,581,100	$ 7,185,000	$ 8,873,300
Less: Distributed and undistributed earnings allocated to non-vested stock	(19,000)	(38,000)	(39,000)	(73,000)
Earnings available to common shareholders - Basic	3,495,000	4,543,000	7,146,000	8,800,000
Weighted average common shares outstanding - Basic (in shares)	8,279	8,149	8,252	8,109
Earnings per common share - Basic (in dollars per share)	$ 0.42	$ 0.56	$ 0.87	$ 1.09
Earnings per share - Diluted [Abstract]
Net earnings	3,513,600	4,581,100	7,185,000	8,873,300
Less: Distributed and undistributed earnings allocated to nonvested stock	(19,000)	(37,000)	(29,000)	(60,000)
Earnings available to common shareholders - Diluted	$ 3,495,000	$ 4,544,000	$ 7,156,000	$ 8,813,000
Weighted average common shares outstanding - Basic (in shares)	8,279	8,149	8,252	8,109
Effect of dilutive options (in shares)	106	149	106	172
Weighted average common shares outstanding - Diluted (in shares)	8,385	8,298	8,358	8,281
Earnings per common share - Diluted (in dollars per share)	$ 0.42	$ 0.55	$ 0.86	$ 1.06
Anti-dilutive equity awards not included above (in shares)	0	0	0	0