Fair Value Measurements (Details) (USD $)	12 Months Ended
	Jun. 05, 2012		May 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long Lived Assets Held For Sale Included In Construction In Progress	$ 21,800,000		$ 23,300,000
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred Compensation Plan investment in RTI common stock			1,556,000	[1]
Long-term debt and capital leases	326,663,000		344,274,000
Letters of credit	0		0
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred Compensation Plan investment in RTI common stock			1,653,000	[1]
Long-term debt and capital leases	312,225,000		348,272,000
Letters of credit	222,000		178,000
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	7,974,000		8,792,000
Deferred compensation plan: other investments - Liabilities	(7,974,000)		(8,792,000)
Deferred compensation plan: RTI common stock - Equity	1,008,000		0
Deferred compensation plan: RTI common stock - Equity	(1,008,000)		0
Total	0		0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets held for sale	26,495,000	[2]	24,686,000	[2]
Long-lived assets held for use	385,000		747,000
Total	26,880,000		25,433,000
Long-lived assets held for sale	891,000	[2]	1,600,000	[2]
Long-lived assets held for use	12,742,000		4,498,000
Total impairment of long-lived assets	13,633,000		6,098,000
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets held for sale	0	[2]	0	[2]
Long-lived assets held for use	0		0
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	26,495,000	[2]	24,686,000	[2]
Long-lived assets held for use	385,000		747,000
Total	26,880,000		25,433,000
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets held for sale	0	[2]	0	[2]
Long-lived assets held for use	0		0
Total	$ 0		$ 0

[1] Fiscal 2012 amounts are not presented for the investment in RTI common stock in the Deferred Compensation Plan as this investment is now measured at fair value on a recurring basis and is reflected in the table above.

[2] Included in the carrying value of long-lived assets held for sale as of June 5, 2012 and May 31, 2011 are $21.8 million and $23.3 million, respectively, of assets included in Construction in progress and other in the Consolidated Balance Sheets as we do not expect to sell these assets within the next 12 months.