Note J - Employee Post-Employment Benefits (Details) - Components of Net Periodic Benefit Cost (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Dec. 03, 2013		Dec. 04, 2012		Dec. 03, 2013	Dec. 04, 2012
Pension Benefits [Member]
Note J - Employee Post-Employment Benefits (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost	$ 89		$ 115		$ 178	$ 230
Interest cost	434		525		868	1,050
Expected return on plan assets	(111)		(102)		(222)	(204)
Amortization of prior service cost		[1]	26	[1]		52
Recognized actuarial loss	428		565		856	1,130
Net periodic benefit cost	840		1,129		1,680	2,258
Postretirement Medical and Life Benefits [Member]
Note J - Employee Post-Employment Benefits (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost	3		3		6	6
Interest cost	17		15		34	30
Amortization of prior service cost	(11)	[1]	(14)	[1]	(22)	(28)
Recognized actuarial loss	61		53		122	106
Net periodic benefit cost	$ 70		$ 57		$ 140	$ 114

[1] Prior service costs are amortized on a straight-line basis over the average remaining service period of employees expected to receive benefits.