Note 8 - Employee Post-employment Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
Jun. 06, 2017 |
May 31, 2016 |
Jun. 02, 2015 |
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| Pension Plan [Member] | |||||
| Interest cost | $ 1,711 | $ 1,999 | $ 1,773 | ||
| Expected return on plan assets | (370) | (411) | (498) | ||
| Amortization of prior service cost (a) | [1] | 1 | 1 | ||
| Recognized actuarial loss | 1,542 | 2,218 | 1,718 | ||
| Curtailment expense | 1 | ||||
| Net periodic benefit cost | 2,909 | 4,120 | 3,295 | ||
| Service cost | 26 | 312 | 301 | ||
| Postretirement Medical and Life Benefits [Member] | |||||
| Interest cost | 36 | 47 | 46 | ||
| Recognized actuarial loss | 71 | 130 | 134 | ||
| Net periodic benefit cost | 108 | 181 | 184 | ||
| Service cost | $ 1 | $ 4 | $ 4 | ||
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