FAIR VALUE MEASUREMENTS (Details) (USD $)	3 Months Ended
	Sep. 04, 2012		Aug. 30, 2011	Jun. 05, 2012
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt and capital leases	$ 322,111,000			$ 326,663,000
Letters of credit	0			0
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt and capital leases	318,540,000			312,225,000
Letters of credit	247,000			222,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long lived assets held for sale included in construction in progress	18,400,000			21,800,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan: other investments - Assets	8,449,000			7,974,000
Deferred compensation plan: other investments - Liabilities	(8,449,000)			(7,974,000)
Deferred compensation plan: RTI common stock - Equity	962,000			1,008,000
Deferred compensation plan: RTI common stock - Equity	(962,000)			(1,008,000)
Total	0			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets held for sale	26,256,000	[1]		26,495,000	[1]
Long-lived assets held for use	448,000			385,000
Total	26,704,000			26,880,000
Long-lived assets held for sale	157,000		206,000
Long-lived assets held for use	291,000		0
Total impairment of long-lived assets	$ 448,000		$ 206,000

[1] Included in the carrying value of long-lived assets held for sale as of September 4, 2012 and June 5, 2012 are $18.4 million and $21.8 million, respectively, of assets included in Construction in progress in the Condensed Consolidated Balance Sheet as we do not expect to sell these assets within the next 12 months.