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Note 12 - Employee Benefit and Retirement Plans (Tables)
 12 Months Ended
Jun. 30, 2016
UK Plan [Member]  
Notes Tables  
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
     
2016
      
2015
      
2014
  
Change in benefit obligation                        
Benefit obligation at beginning of year
   $ 49,791     $ 51,008     $ 41,528  
Service cost
     0       0       383  
Interest cost
     1,784       1,979       2,054  
Participant contributions
     -       -       183  
Exchange rate changes
     (7,825
)
     (4,167
)
     5,359  
Benefits paid
     (1,997
)
     (2,152
)
     (1,693
)
Actuarial loss
     2,617       3,123       3,194  
Benefit obligation at end of year
   $ 44,370     $ 49,791     $ 51,008  
                         
Weighted average assumptions - benefit obligation
                        
Discount rate
     3.00
%
     3.90
%
     4.30
%
Rate of compensation increase
     n/a       n/a       n/a
%
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
   $ 37,934     $ 38,295     $ 32,118  
Actual return on plan assets
     1,956       3,740       2,444  
Employer contributions
     1,102       1,179       1,148  
Participant contributions
     -       -       183  
Benefits paid
     (1,997
)
     (2,152
)
     (1,693
)
Exchange rate changes
     (5,890
)
     (3,128
)
     4,095  
Fair value of plan assets at end of year
     33,105       37,934       38,295  
Funded status at end of year
   $ (11,265
)
   $ (11,857
)
     (12,713
)
Amounts recognized in balance sheet                        
Current liability
   $ —     $ —     $ —  
Noncurrent liability
     (11,265
)
     (11,857
)
     (12,713
)
Net amount recognized in balance sheet
   $ (11,265
)
   $ (11,857
)
   $ (12,713
)
                         
Weighted average assumptions – net periodic benefit cost
                        
                         
Discount rate
     3.90
%
     4.30
%
     4.70
%
Rate of compensation increase
     n/a       n/a       3.10
%
Return on plan assets
     4.77
%
     5.45
%
     5.40
%
                         
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
                        
Prior service cost
   $ —     $ —     $ —  
Accumulated loss
     (4,437
)
     (4,978
)
     (5,101
)
Amounts not yet recognized as a component of net periodic benefit cost
     (4,437
)
     (4,978
)
     (5,101
)
Accumulated net periodic benefit cost in excess of contributions
     (6,828
)
     (6,879
)
     (7,612
)
Net amount recognized
   $ (11,265
)
   $ (11,857
)
   $ (12,713
)
                         
Components of net periodic benefit cost
                        
Service cost
   $ —     $ —     $ 383  
Interest cost
     1,784       1,979       2,054  
Expected return on plan assets
     (1,679
)
     (1,903
)
     (1,848
)
Amortization of net loss
     2,099       990       386  
Net periodic benefit cost
   $ 2,204     $ 1,066     $ 975  
                         
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
   $ 44,370     $ 49,791     $ 51,008  
Accumulated benefit obligation
     44,370       49,791       51,008  
Fair value of assets
     33,104       37,934       38,295  
US Plan [Member]  
Notes Tables  
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
 
 
2016
 
 
2015
 
 
2014
 
Change in benefit obligation
                        
Benefit obligation at beginning of year
   $ 116,398     $ 110,054     $ 99,788  
Service cost
     2,757       2,663       2,326  
Interest cost
     5,248       4,839       4,868  
Benefits paid
     (4,593
)
     (4,372
)
     (4,263
)
Actuarial loss
     11,053       3,214       7,335  
Benefit obligation at end of year
   $ 130,863     $ 116,398     $ 110,054  
                         
Weighted average assumptions – benefit obligation
                        
Discount rate
     3.77
%
     4.49
%
     4.29
%
Rate of compensation increase
     Varies       Varies       Varies  
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
   $ 84,853     $ 84,629     $ 77,208  
Actual return on plan assets
     (1,730
)
     (274
)
     11,661  
Employer contributions
     3,380       4,870       23  
Benefits paid
     (4,593
)
     (4,372
)
     (4,263
)
Fair value of plan assets at end of year
     81,910       84,853       84,629  
Funded status at end of year
   $ (48,953
)
   $ (31,545
)
   $ (25,425
)
                         
Amounts recognized in balance sheet
                        
Current liability
   $ (45
)
   $ (37
)
   $ (37
)
Noncurrent liability
     (48,908
)
     (31,508
)
     (25,388
)
Net amount recognized in balance sheet
   $ (48,953
)
   $ (31,545
)
   $ (25,425
)
                         
Weighted average assumptions – net periodic benefit cost
                        
Discount rate
     4.49
%
     4.29
%
     4.96
%
Rate of compensation increase
     Varies       Varies       Varies  
Return on plan assets
     5.50
%
     6.00
%
     6.00
%
                         
Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive loss
                        
Prior service cost
   $ -     $ -     $ -  
Accumulated loss
     (13,412
)
     (11,817
)
     (3,585
)
Amounts not yet recognized as a component of net periodic benefit cost
     (13,412
)
     (11,817
)
     (3,585
)
Accumulated contributions less than net periodic benefit cost
     (35,541
)
     (19,728
)
     (21,840
)
Net amount recognized
   $ (48,953
)
   $ (31,545
)
   $ (25,425
)
                         
Components of net periodic benefit cost
                        
Service cost
   $ 2,757     $ 2,663     $ 2,326  
Interest cost
     5,248       4,839       4,868  
Expected return on plan assets
     (4,589
)
     (5,063
)
     (4,484
)
Amortization of prior service cost
     -       -       116  
Recognized actuarial loss
     15,779       319       12  
Net periodic benefit cost
   $ 19,195     $ 2,758     $ 2,838  
                         
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
                        
Prior service cost
   $ -     $ -     $ (30
)
Net loss
     (114
)
     (53
)
     -  
                         
Information for plan with accumulated benefits in excess of plan assets
                        
Projected benefit obligation
   $ 130,863     $ 116,398     $ 110,054  
Accumulated benefit obligation
     123,749       109,383       103,155  
Fair value of assets
     81,910       84,853       84,629  
US and UK Plans Combined [Member]  
Notes Tables  
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
 
 
2016
 
 
2015
 
 
2014
 
Change in benefit obligation
                        
Benefit obligation at beginning of year
   $ 166,189     $ 161,062     $ 141,316  
Service cost
     2,757       2,663       2,709  
Interest cost
     7,032       6,818       6,922  
Participant contributions
     -       -       183  
Exchange rate changes
     (7,825
)
     (4,167
)
     5,359  
Benefits paid
     (6,590
)
     (6,524
)
     (5,956
)
Actuarial (gain) loss
     13,670       6,337       10,529  
Benefit obligation at end of year
   $ 175,233     $ 166,189     $ 161,062  
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
     122,787       122,924       109,326  
Actual return on plan assets
     226       3,466       14,105  
Employer contributions
     4,482       6,049       1,171  
Participant contributions
     -       -       183  
Benefits paid
     (6,590
)
     (6,524
)
     (5,956
)
Exchange rate changes
     (5,890
)
     (3,128
)
     4,095  
Fair value of plan assets at end of year
     115,015       122,787       122,924  
Funded status at end of year
   $ (60,218
)
   $ (43,402
)
   $ (38,138
)
Amounts recognized in balance sheet
                        
Current liability
   $ (45
)
   $ (37
)
   $ (37
)
Noncurrent liability
     (60,173
)
     (43,365
)
     (38,101
)
Net amount recognized in balance sheet
   $ (60,218
)
   $ (43,402
)
   $ (38,138
)
                         
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
                        
Prior service cost
   $ -     $ -     $ -  
Accumulated loss
     (17,849
)
     (16,795
)
     (8,686
)
Amounts not yet recognized as a component of net periodic benefit cost
     (17,849
)
     (16,795
)
     (8,686
)
Accumulated net periodic benefit cost in excess of contributions
     (42,369
)
     (26,607
)
     (29,452
)
Net amount recognized
   $ (60,218
)
   $ (43,402
)
   $ (38,138
)
                         
Components of net periodic benefit cost
                        
Service cost
   $ 2,757     $ 2,663     $ 2,709  
Interest cost
     7,032       6,818       6,922  
Expected return on plan assets
     (6,268
)
     (6,966
)
     (6,332
)
Amortization of prior service cost
     -       -       116  
Recognized actuarial loss
     17,878       1,309       398  
Net periodic benefit cost
   $ 21,399     $ 3,824     $ 3,813  
                         
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
                        
Prior service cost
   $ -     $ -     $ (30
)
Net loss
     (114
)
     (53
)
     -  
                         
Information for pension plans with accumulated benefits in excess of plan assets
                        
Projected benefit obligation
   $ 175,233     $ 166,189     $ 161,062  
Accumulated benefit obligation
     168,119       159,174       154,163  
Fair value of assets
     115,015       122,787       122,924  
Schedule of Allocation of Plan Assets [Table Text Block]
 
 
2016
 
 
2015
 
Asset category:
                
Cash equivalents
     0
%
     1
%
Fixed income
     18
%
     17
%
Equities
     27
%
     25
%
Mutual and pooled funds
    55
%
     57
%
      100
%
     100
%
Schedule of Portfolio By Valuation Category [Table Text Block]
June 30, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Asset Category
  
Level 1
    
Level 2
    
Level 3
    
Total
    
%
  
Cash Equivalent
   $ 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
%
June 30, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Asset Category
 
Level 1
 
 
Level 2
 
 
Level 3
 
 
Total
 
 
%
 
Cash Equivalent
   $ 1,064     $ -     $ -     $ 1,064       1
%
Fixed Income
     -       21,058       -       21,058       17
%
Equities
     27,960       3,210       -       31,170       25
%
Mutual & Pooled Funds
     31,873       33,538       4,084       69,495       57
%
Total
   $ 60,897     $ 57,806     $ 4,084     $ 122,787       100
%
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]
 
 
Fair Value Measurement Using
S
ignificant Unobservable Inputs
(Level 3)
 
 
 
2016
 
 
2015
 
                 
Beginning balance
   $ 4,084     $ 3,895  
Actual returns on assets
     (718
)
     507  
Translation loss
     (556
)
     (318
)
                 
Ending balance
   $ 2,810     $ 4,084  
Schedule of Medical and Life Insurance Benefits [Table Text Block]
 
 
2016
 
 
2015
 
 
2014
 
Change in benefit obligation:
                        
Benefit obligation at beginning of year
   $ 6,611     $ 5,867     $ 10,964  
Service cost
     105       113       225  
Interest cost
     287       244       396  
Plan amendments
     —       —       (5,730
)
Benefits paid
     (772
)
     (647
)
     (429
)
Actuarial (gain) loss
     1,150       1,034       441  
Benefit obligation at end of year
   $ 7,381     $ 6,611     $ 5,867  
                         
Weighted average assumptions: benefit obligations
                        
Discount rate
     3.77
%
     4.49
%
     4.29
%
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
     772       647       429  
Benefits paid, net of employee contributions
     (772
)
     (647
)
     (429
)
Fair value of plan assets at end of year
     —       —       —  
                         
Amounts recognized in balance sheet
                        
Current postretirement benefit obligation
   $ (396
)
   $ (441
)
   $ (379
)
Non-current postretirement benefit obligation
     (6,985
)
     (6,170
)
     (5,488
)
Net amount recognized in balance sheet
   $ (7,381
)
   $ (6,611
)
   $ (5,867
)
                         
Weighted average assumptions – net periodic benefit cost
                        
Discount rate
     4.49
%
     4.29
%
     4.96
%
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
   $ 4,523     $ 5,305     $ 6,104  
Accumulated gain (loss)
     (1,983
)
     (850
)
     185  
Amounts not yet recognized as a component of net periodic benefit cost
     2,540       4,455       6,289  
Net periodic benefit cost in excess of accumulated contributions
     (9,921
)
     (11,066
)
     (12,156
)
Net amount recognized
   $ (7,381
)
   $ (6,611
)
   $ (5,867
)
                         
Components of net periodic benefit cost
                        
Service cost
   $ 105     $ 113     $ 225  
Interest cost
     287       244       396  
Amortization of prior service credit
     (781
)
     (799
)
     (771
)
Amortization of accumulated loss
     15       —       (1
)
Net periodic benefit cost
   $ (374
)
   $ (442
)
   $ (151  
                         
                         
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
                        
Prior service credit
  $ 673     $ 781     $ 799  
Net loss
     (120
)
     (15
)
     —  
    $ 553     $ 766     $ 799  
                         
                         
Healthcare cost trend rate assumed for next year
     6.90
%
     8.00
%
     8.30
%
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
     2027    
 
 2027    
 
 2026  
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
 
 
1% Increase
 
 
 
2016
 
 
2015
 
 
2014
 
Effect on total of service and interest cost
   $ -     $ -     $ 35  
Effect on postretirement benefit obligation
     2       4       7  
 
 
1% Decrease
 
 
 
2016
 
 
2015
 
 
2014
 
Effect on total of service and interest cost
   $ -     $ -     $ (30
)
Effect on postretirement benefit obligation
     (2
)
     (4
)
     (7
)
Schedule of Expected Benefit Payments [Table Text Block]
Fiscal Year
 
Pension
 
 
Other
Benefits
 
2017
   $ 6,700     $ 396  
2018
     6,997       363  
2019
     7,326       358  
2020
     7,656       364  
2021
     7,966       370  
2022-2026
     45,924       1,926