Note 8 - Employee Post-employment Benefits - Change in Benefit Obligation and Plan Assets and Reconciliation of Funded Status (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 06, 2017	May 31, 2016	Jun. 02, 2015
Beginning fair value of plan assets		$ 6,209
Ending fair value of plan assets		6,126	$ 6,209
Pension Plan [Member]
Beginning projected benefit obligation		44,429	43,843
Service cost		26	312	$ 301
Interest cost		1,711	1,999	1,773
Plan participant contributions
Actuarial loss/(gain)		(183)	1,411
Benefits paid		(3,403)	(2,888)
Curtailment gain			(248)
Benefit obligation at end of year		42,580	44,429	43,843
Beginning fair value of plan assets		6,209	6,786
Actual return on plan assets		554	(318)
Employer contributions		2,766	2,629
Plan participant contributions
Benefits paid		(3,403)	(2,888)
Ending fair value of plan assets		6,126	6,209	6,786
Funded status at end of year	[1]	(36,454)	(38,220)
Accrued liabilities – payroll and related costs		(2,953)	(2,527)
Other deferred liabilities		(33,501)	(35,693)
Net amount recognized at year-end		(36,454)	(38,220)
Net actuarial loss		(14,912)	(16,821)
Total amount recognized		(14,912)	(16,821)
Postretirement Medical and Life Benefits [Member]
Beginning projected benefit obligation		1,100	1,404
Service cost		1	4	4
Interest cost		36	47	46
Plan participant contributions		84	73
Actuarial loss/(gain)		(147)	(373)
Benefits paid		(85)	(55)
Curtailment gain
Benefit obligation at end of year		989	1,100	1,404
Beginning fair value of plan assets
Actual return on plan assets
Employer contributions		1	(18)
Plan participant contributions		84	73
Benefits paid		(85)	(55)
Ending fair value of plan assets
Funded status at end of year		(989)	(1,100)
Accrued liabilities – payroll and related costs		(123)	(113)
Other deferred liabilities		(866)	(987)
Net amount recognized at year-end		(989)	(1,100)
Net actuarial loss		(273)	(491)
Total amount recognized		$ (273)	$ (491)

[1] The funded status reflected above includes the liabilities attributable to all of the Pension Plans but only the assets of the Retirement Plan as the other plans are not considered funded for Employee Retirement Income Security Act purposes. To provide a source for the payment of benefits under the Executive Supplemental Pension Plan and the Management Retirement Plan, we own life insurance contracts on some of the participants. The cash value of these policies (Level 2), which are included within the Other Assets caption in our Consolidated Balance Sheets, was $25.4 million and $27.9 million at June 6, 2017 and May 31, 2016, respectively. In addition, we reclassified as Restricted cash in our Consolidated Balance Sheets as as of June 6, 2017 and May 31, 2016 $1.4 million and $0.4 million, respectively, of cash held in trust that is restricted for benefit payments under these plans. We maintain a rabbi trust to hold the policies and death benefits as they are received.