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Note 12 - Employee Benefit and Retirement Plans (Tables)
 12 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Allocation of Plan Assets [Table Text Block]
 
 
2017
 
 
2016
 
Asset category:
                
Cash equivalents
    
1
%
    
0
%
Fixed income
    
18
%
    
18
%
Equities
    
24
%
    
27
%
Mutual and pooled funds
   
57
%
    
55
%
     
100
%
    
100
%
Schedule of Portfolio By Valuation Category [Table Text Block]
June 30, 2017
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Asset Category
 
Level 1
 
 
Level 2
 
 
Level 3
 
 
Total
 
 
%
 
Cash Equivalents
   $
780
    $
-
    $
-
    $
780
     
1
%
Fixed Income
    
-
     
21,128
      
-
     
21,128
      
18
%
Equities
    
26,580
      
1,709
     
-
     
28,289
      
24
%
Mutual & Pooled Funds
    
31,867
     
35,714
     
-
      
67,581
      
57
%
Total
   $
59,227
     $
58,551
     $
-
     $
117,778
      
100
%
June 30, 201
6
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Asset Category
  
Level 1
    
Level 2
    
Level 3
    
Total
    
%
  
Cash Equivalents
   $
672
     $
-
     $
-
     $
672
      
0
%
Fixed Income
    
-
      
20,342
      
-
      
20,342
      
18
%
Equities
    
28,639
      
2,435
      
-
      
31,074
      
27
%
Mutual & Pooled Funds
    
30,057
      
30,060
      
2,810
      
62,927
      
55
%
Total
   $
59,368
     $
52,837
     $
2,810
     $
115,015
      
100
%
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]
 
 
Fair Value Measurement Using
Significant Unobservable Inputs
(Level 3)
 
 
 
2017
 
 
2016
 
                 
Beginning balance
   $
2,810
     $
4,084
  
Actual returns on assets
    
-
      
(718
)
Translation gain (loss)
    
-
      
(556
)
Transferred out of Level 3    
(2,810
 )    
-
  
                 
Ending balance
   $
-
     $
2,810
  
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
 
 
2017
 
 
2016
 
 
2015
 
Change in benefit obligation
                        
Benefit obligation at beginning of year
   $
175,233
     $
166,189
     $
161,062
  
Service cost
    
1,405
      
2,757
      
2,663
  
Interest cost
    
6,246
      
7,032
      
6,818
  
Plan curtailment
    
(4,170
)
    
-
      
-
  
Exchange rate changes
    
(909
)
    
(7,825
)
    
(4,167
)
Benefits paid
    
(6,902
)
    
(6,590
)
    
(6,524
)
Actuarial (gain) loss
    
(1,207
)
    
13,670
      
6,337
  
Benefit obligation at end of year
   $
169,696
     $
175,233
     $
166,189
  
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
    
115,015
      
122,787
      
122,924
  
Actual return on plan assets
    
5,302
      
226
      
3,466
  
Employer contributions
    
5,000
      
4,482
      
6,049
  
Benefits paid
    
(6,902
)
    
(6,590
)
    
(6,524
)
Exchange rate changes
    
(637
)
    
(5,890
)
    
(3,128
)
Fair value of plan assets at end of year
    
117,778
      
115,015
      
122,787
  
Funded status at end of year
   $
(51,918
)
   $
(60,218
)
   $
(43,402
)
Amounts recognized in balance sheet
                        
Current liability
   $
(63
)
   $
(45
)
   $
(37
)
Noncurrent liability
    
(51,855
)
    
(60,173
)
    
(43,365
)
Net amount recognized in balance sheet
   $
(51,918
)
   $
(60,218
)
   $
(43,402
)
                         
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
                        
Prior service cost
   $
-
     $
-
     $
-
  
Accumulated loss
    
(12,131
)
    
(17,849
)
    
(16,795
)
Amounts not yet recognized as a component of net periodic benefit cost
    
(12,131
)
    
(17,849
)
    
(16,795
)
Accumulated net periodic benefit cost in excess of contributions
    
(39,787
)
    
(42,369
)
    
(26,607
)
Net amount recognized
   $
(51,918
)
   $
(60,218
)
   $
(43,402
)
                         
Components of net periodic benefit cost
                        
Service cost
   $
1,405
     $
2,757
     $
2,663
  
Interest cost
    
6,246
      
7,032
      
6,818
  
Expected return on plan assets
    
(5,173
)
    
(6,268
)
    
(6,966
)
Recognized actuarial loss
    
107
      
17,878
      
1,309
  
Net periodic benefit cost
   $
2,585
     $
21,399
     $
3,824
  
                         
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
                        
Prior service cost
   $
-
     $
-
     $
-
  
Net loss
    
(26
)
    
(114
)
    
(53
)
                         
Information for pension plans with accumulated benefits in excess of plan assets
                        
Projected benefit obligation
   $
169,696
     $
175,233
     $
166,189
  
Accumulated benefit obligation
    
169,696
      
168,119
      
159,174
  
Fair value of assets
    
117,779
      
115,015
      
122,787
  
 
 
2017
 
 
2016
 
 
2015
 
Change in benefit obligation
                        
Benefit obligation at beginning of year
   $
130,863
     $
116,398
     $
110,054
  
Service cost
    
1,405
      
2,757
      
2,663
  
Interest cost
    
4,994
      
5,248
      
4,839
  
Plan curtailment
    
(4,170
)
    
-
      
-
  
Benefits paid
    
(5,106
)
    
(4,593
)
    
(4,372
)
Actuarial loss
    
(3,848
)
    
11,053
      
3,214
  
Benefit obligation at end of year
   $
124,138
     $
130,863
     $
116,398
  
                         
Weighted average assumptions – benefit obligation
                        
Discount rate
    
3.92
%
    
3.77
%
    
4.49
%
Rate of compensation increase
  
Varies
    
Varies
    
Varies
  
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
   $
81,910
     $
84,853
     $
84,629
  
Actual return on plan assets
    
1,079
      
(1,730
)
    
(274
)
Employer contributions
    
4,045
      
3,380
      
4,870
  
Benefits paid
    
(5,106
)
    
(4,593
)
    
(4,372
)
Fair value of plan assets at end of year
    
81,928
      
81,910
      
84,853
  
Funded status at end of year
   $
(42,210
)
   $
(48,953
)
   $
(31,545
)
                         
Amounts recognized in balance sheet
                        
Current liability
   $
(63
)
   $
(45
)
   $
(37
)
Noncurrent liability
    
(42,147
)
    
(48,908
)
    
(31,508
)
Net amount recognized in balance sheet
   $
(42,210
)
   $
(48,953
)
   $
(31,545
)
                         
Weighted average assumptions – net periodic benefit cost
                        
Discount rate
    
3.77
%
    
4.49
%
    
4.29
%
Rate of compensation increase
  
Varies
    
Varies
    
Varies
  
Return on plan assets
    
5.00
%
    
5.50
%
    
6.00
%
                         
Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive loss
                        
Prior service cost
   $
-
     $
-
     $
-
  
Accumulated loss
    
(8,254
)
    
(13,412
)
    
(11,817
)
Amounts not yet recognized as a component of net periodic benefit cost
    
(8,254
)
    
(13,412
)
    
(11,817
)
Accumulated contributions less than net periodic benefit cost
    
(33,956
)
    
(35,541
)
    
(19,728
)
Net amount recognized
   $
(42,210
)
   $
(48,953
)
   $
(31,545
)
                         
Components of net periodic benefit cost
                        
Service cost
   $
1,405
     $
2,757
     $
2,663
  
Interest cost
    
4,994
      
5,248
      
4,839
  
Expected return on plan assets
    
(4,046
)
    
(4,589
)
    
(5,063
)
Recognized actuarial loss
    
107
      
15,779
      
319
  
Net periodic benefit cost
   $
2,460
     $
19,195
     $
2,758
  
                         
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
                        
Prior service cost
   $
-
     $
-
     $
-
  
Net loss
    
(26
)
    
(114
)
    
(53
)
                         
Information for plan with accumulated benefits in excess of plan assets
                        
Projected benefit obligation
   $
124,138
     $
130,863
     $
116,398
  
Accumulated benefit obligation
    
124,138
      
123,749
      
109,383
  
Fair value of assets
    
81,928
      
81,910
      
84,853
  
 
 
2017
 
 
2016
 
 
2015
 
Change in benefit obligation
                        
Benefit obligation at beginning of year
   $
44,370
     $
49,791
     $
51,008
  
Interest cost
    
1,252
      
1,784
      
1,979
  
Exchange rate changes
    
(909
)
    
(7,825
)
    
(4,167
)
Benefits paid
    
(1,796
)
    
(1,997
)
    
(2,152
)
Actuarial loss
    
2,641
      
2,617
      
3,123
  
Benefit obligation at end of year
   $
45,558
     $
44,370
     $
49,791
  
                         
Weighted average assumptions - benefit obligation
                        
Discount rate
    
2.73
%
    
3.00
%
    
3.90
%
Rate of compensation increase
    
n/a
      
n/a
      
n/a
  
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
   $
33,105
     $
37,934
     $
38,295
  
Actual return on plan assets
    
4,223
      
1,956
      
3,740
 
Employer contributions
    
954
      
1,102
      
1,179
  
Benefits paid
    
(1,796
)
    
(1,997
)
    
(2,152
)
Exchange rate changes
    
(636
)
    
(5,890
)
    
(3,128
)
Fair value of plan assets at end of year
    
35,850
      
33,105
      
37,934
  
Funded status at end of year
   $
(9,708
)
   $
(11,265
)
    
(11,857
)
Amounts recognized in balance sheet
                        
Current liability
   $
—
     $
—
     $
—
  
Noncurrent liability
    
(9,708
)
    
(11,265
)
    
(11,857
)
Net amount recognized in balance sheet
   $
(9,708
)
   $
(11,265
)
   $
(11,857
)
                         
Weighted average assumptions – net periodic benefit cost
                        
                         
Discount rate
    
3.00
%
    
3.90
%
    
4.30
%
Rate of compensation increase
    
n/a
      
n/a
      
n/a
  
Return on plan assets
    
3.59
%
    
4.77
%
    
5.45
%
                         
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
                        
Prior service cost
   $
—
     $
—
     $
—
  
Accumulated loss
    
(3,877
)
    
(4,437
)
    
(4,978
)
Amounts not yet recognized as a component of net periodic benefit cost
    
(3,877
)
    
(4,437
)
    
(4,978
)
Accumulated net periodic benefit cost in excess of contributions
    
(5,831
)
    
(6,828
)
    
(6,879
)
Net amount recognized
   $
(9,708
)
   $
(11,265
)
   $
(11,857
)
                         
Components of net periodic benefit cost
                        
Service cost
   $
—
     $
—
     $
—
  
Interest cost
    
1,252
      
1,784
      
1,979
  
Expected return on plan assets
    
(1,127
)
    
(1,679
)
    
(1,903
)
Amortization of net loss
    
—
      
2,099
      
990
  
Net periodic benefit cost
   $
125
     $
2,204
     $
1,066
  
                         
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
   $
—
     $
—
     $
—
  
                         
Information for plan with accumulated benefits in excess of plan assets
                        
Projected benefit obligation
   $
45,558
     $
44,370
     $
49,791
  
Accumulated benefit obligation
    
45,558
      
44,370
      
49,791
  
Fair value of assets
    
35,851
      
33,104
      
37,934
  
Schedule of Medical and Life Insurance Benefits [Table Text Block]
 
 
2017
 
 
2016
 
 
2015
 
Change in benefit obligation:
                        
Benefit obligation at beginning of year
   $
7,381
     $
6,611
     $
5,867
  
Service cost
    
85
      
105
      
113
  
Interest cost
    
269
      
287
      
244
  
Benefits paid
    
(483
)
    
(772
)
    
(647
)
Actuarial (gain) loss
    
(166
)
    
1,150
      
1,034
  
Benefit obligation at end of year
   $
7,086
     $
7,381
     $
6,611
  
                         
Weighted average assumptions: benefit obligations
                        
Discount rate
    
3.92
%
    
3.77
%
    
4.49
%
Rate of compensation increase
    
2.64
%
    
2.64
%
    
2.64
%
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
   $
—
     $
—
     $
—
  
Employer contributions
    
483
      
772
      
647
  
Benefits paid, net of employee contributions
    
(483
)
    
(772
)
    
(647
)
Fair value of plan assets at end of year
    
—
      
—
      
—
  
                         
Amounts recognized in balance sheet
                        
Current postretirement benefit obligation
   $
(370
)
   $
(396
)
   $
(441
)
Non-current postretirement benefit obligation
    
(6,716
)
    
(6,985
)
    
(6,170
)
Net amount recognized in balance sheet
   $
(7,086
)
   $
(7,381
)
   $
(6,611
)
                         
Weighted average assumptions – net periodic benefit cost
                        
Discount rate
    
3.77
%
    
4.49
%
    
4.29
%
Rate of compensation increase
    
2.64
%
    
2.64
%
    
2.64
%
                         
Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive loss
                        
Prior service credit
   $
3,851
     $
4,523
     $
5,305
  
Accumulated gain (loss)
    
(1,696
)
    
(1,983
)
    
(850
)
Amounts not yet recognized as a component of net periodic benefit cost
    
2,155
      
2,540
      
4,455
  
Net periodic benefit cost in excess of accumulated contributions
    
(9,241
)
    
(9,921
)
    
(11,066
)
Net amount recognized
   $
(7,086
)
   $
(7,381
)
   $
(6,611
)
                         
Components of net periodic benefit cost
                        
Service cost
   $
85
     $
105
     $
113
  
Interest cost
    
269
      
287
      
244
  
Amortization of prior service credit
    
(673
)
    
(781
)
    
(799
)
Amortization of accumulated loss
    
121
      
15
      
—
  
Net periodic benefit cost
   $
(198
)
   $
(374
)
   $
(442
)
                         
                         
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
                        
Prior service credit
  $
537
     $
673
     $
781
  
Net loss
    
(99
)
    
(120
)
    
(15
)
    $
438
     $
553
     $
766
  
                         
                         
Healthcare cost trend rate assumed for next year
    
6.60
%
    
6.90
%
    
8.00
%
Rate to which the cost trend rate gradually declines
    
4.50
%
    
4.50
%
    
4.50
%
Year that the rate reaches the rate at which it is assumed to remain
  
2037
    
2037
    
2028
  
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
 
 
1% Increase
 
 
 
2017
 
 
2016
 
 
2015
 
Effect on total of service and interest cost
   $
-
     $
-
     $
-
  
Effect on postretirement benefit obligation
    
2
      
2
      
4
  
 
 
1% Decrease
 
 
 
2017
 
 
2016
 
 
2015
 
Effect on total of service and interest cost
   $
-
     $
-
     $
-
  
Effect on postretirement benefit obligation
    
(2
)
    
(2
)
    
(4
)
Schedule of Expected Benefit Payments [Table Text Block]
Fiscal Year
 
 
Pension
 
 
Other
Benefits
 
2018
     $
6,874
    $
370
 
2019
      
7,132
     
362
 
2020
      
7,368
     
367
 
2021
      
7,611
     
373
 
2022
      
7,986
     
381
 
2023-2027      
43,702
     
1,937