General (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 26, 2015	Nov. 27, 2014	Nov. 26, 2015		Nov. 27, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning Balance, Swap Agreements				$ (17)		$ 34
Other comprehensive loss before reclassifications, Swap Agreements		$ 8	$ (95)	(58)		(55)
Amounts reclassified from accumulated other comprehensive loss, Swap Agreements		27	30	56	[1]	59	[1]
Net other comprehensive income (loss), Swap Agreements				(2)		4
Ending Balance, Swap Agreements		(19)	38	(19)		38
Beginning Balance, Available for Sale Investments				(11)		(11)
Other comprehensive loss before reclassifications, Available for Sale Investments				0		0
Amounts reclassified from accumulated other comprehensive loss, Available for Sale Investments	[1]			0		0
Net other comprehensive income (loss), Available for Sale Investments				0		0
Ending Balance, Available for Sale Investments		(11)	(11)	(11)		(11)
Beginning Balance, Pension Obligation				(5,284)		(4,581)
Other comprehensive loss before reclassifications, Pension Obligation				0		0
Amounts reclassified from accumulated other comprehensive loss, Pension Obligation	[1]			0		0
Net other comprehensive income (loss), Pension Obligation				0		0
Ending Balance, Pension Obligation		(5,284)	(4,581)	(5,284)		(4,581)
Beginning Balance, Accumulated Other Comprehensive Loss				(5,312)		(4,558)
Other comprehensive loss before reclassifications, Accumulated Other Comprehensive Loss				(58)		(55)
Amounts reclassified from accumulated other comprehensive loss, Accumulated Other Comprehensive Loss	[1]			56		59
Net other comprehensive income (loss), Accumulated Other Comprehensive Loss		35	(65)	(2)		4
Ending Balance, Accumulated Other Comprehensive Loss		$ (5,314)	$ (4,554)	$ (5,314)		$ (4,554)

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