EARNINGS PER SHARE AND STOCK REPURCHASES (Details) (USD $)	3 Months Ended			9 Months Ended
	Feb. 28, 2012	Aug. 30, 2011	Mar. 01, 2011	Feb. 28, 2012	Mar. 01, 2011
EARNINGS PER SHARE AND STOCK REPURCHASES [Abstract]
Net income	$ 4,536,000		$ 16,000,000	$ 5,628,000	$ 32,962,000
Weighted-average common shares outstanding (in shares)	62,643,000		64,177,000	62,999,000	63,956,000
Dilutive effect of stock options and restricted stock (in shares)	410,000		1,060,000	504,000	893,000
Weighted average common and dilutive potential common shares outstanding (in shares)	63,053,000		65,237,000	63,503,000	64,849,000
Basic earnings per share (in dollars per share)	$ 0.07		$ 0.25	$ 0.09	$ 0.52
Diluted earnings per share (in dollars per share)	$ 0.07		$ 0.25	$ 0.09	$ 0.51
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares that did not impact the computation of diluted earnings per share (in shares)	3,481,000		2,714,000	3,142,000	3,249,000
Repurchased common stock (in shares)	0	2,000,000
Repurchased common stock		$ 18,400,000
Remaining shares authorized repurchased (in shares)	5,900,000			5,900,000
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares that did not impact the computation of diluted earnings per share (in shares)	2,564,000		2,326,000	2,237,000	2,810,000
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares that did not impact the computation of diluted earnings per share (in shares)	917,000		388,000	905,000	439,000