General (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 27, 2014	Feb. 28, 2013	Feb. 27, 2014		Feb. 28, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning Balance, Swap Agreements			$ 18		$ (58)
Other comprehensive income (loss) before reclassifications, Swap Agreements			(50)		0
Amounts reclassified from accumulated other comprehensive loss, Swap Agreements			87	[1]	51	[1]
Net other comprehensive income (loss), Swap Agreements			37		51
Ending Balance, Swap Agreements	55	(7)	55		(7)
Beginning Balance, Available for Sale Investments			(10)		(8)
Other comprehensive income (loss) before reclassifications, Available for Sale Investments			(1)		0
Amounts reclassified from accumulated other comprehensive loss, Available for Sale Investments			0	[1]	0	[1]
Net other comprehensive income (loss), Available for Sale Investments	0	0	(1)		0
Ending Balance, Available for Sale Investments	(11)	(8)	(11)		(8)
Beginning Balance, Pension Obligation			(3,836)		(4,073)
Other comprehensive income (loss) before reclassifications, Pension Obligation			0		0
Amounts reclassified from accumulated other comprehensive loss, Pension Obligation			0	[1]	0	[1]
Net other comprehensive income (loss), Pension Obligation			0		0
Ending Balance, Pension Obligation	(3,836)	(4,073)	(3,836)		(4,073)
Beginning Balance, Accumulated Other Comprehensive Loss			(3,828)		(4,139)
Other comprehensive income (loss) before reclassifications, Accumulated Other Comprehensive Loss			(51)		0
Amounts reclassified from accumulated other comprehensive loss, Accumulated Other Comprehensive Loss			87	[1]	51	[1]
Net other comprehensive income (loss), Accumulated Other Comprehensive Loss	33	17	36		51
Ending Balance, Accumulated Other Comprehensive Loss	$ (3,792)	$ (4,088)	$ (3,792)		$ (4,088)

[1] Amounts are included in interest expense in the consolidated statements of earnings.