Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	May 31, 2014
Current assets:
Cash and cash equivalents	$ 13,034	$ 14,521
Investment securities available-for-sale	224,804	194,738
Trade receivables (less allowance for doubtful accounts of $1,205 at February 28, 2015 and $430 at May 31, 2014) and other receivables	106,368	87,516
Inventories	146,230	146,117
Prepaid expenses and other current assets	3,380	2,501
Total current assets	493,816	445,393
Property, plant and equipment, net	348,782	314,935
Goodwill	29,196	29,196
Other investments	15,587	6,786
Other intangible assets	8,262	10,423
Other assets	5,106	4,928
TOTAL ASSETS	900,749	811,661
Current liabilities:
Accounts payable and accrued expenses	76,916	69,937
Accrued dividends payable	16,961	10,497
Current maturities of long-term debt	10,047	10,216
Deferred income taxes	31,963	30,451
Total current liabilities	135,887	121,101
Long-term debt, less current maturities	43,320	50,877
Other noncurrent liabilities	4,636	4,436
Deferred income taxes	43,980	40,502
Total liabilities	227,823	216,916
Commitments and Contingencies - see Note 4
Stockholders' equity:
Paid-in capital	42,113	40,476
Retained earnings	649,237	572,874
Accumulated other comprehensive income, net of tax	491	561
Common stock in treasury at cost – 26,589 shares at February 28, 2015 and 26,699 at May 31, 2014, respectively	(20,502)	(20,453)
Total Cal-Maine Foods, Inc. stockholders' equity	(672,090)	(593,833)
Noncontrolling interest in consolidated entities	836	912
Total stockholders' equity	672,926	594,745
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	900,749	811,661
Common Stock [Member]
Stockholders' equity:
Common stock	703	351
Total stockholders' equity	703	351
Class A Common Stock [Member]
Stockholders' equity:
Common stock	48	24
Total stockholders' equity	$ 48	$ 24