Net Income Per Common Share (Computation Of Basic And Diluted Net Income Per Share Attributable To The Company) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Sep. 01, 2012	Aug. 27, 2011
Net Income Per Common Share [Abstract]
Net income attributable to Cal-Maine Foods,Inc.	$ 9,415	$ 3,117
Basic weighted-average common shares	23,921	23,867
Common stock options	37	78
Dilutive potential common shares	23,958	23,945
Basic	$ 0.39	$ 0.13
Diluted	$ 0.39	$ 0.13