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Note 11 - Employee Benefit and Retirement Plans (Tables)
 12 Months Ended
Jun. 30, 2015
UK Plan [Member]  
Notes Tables  
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
 
 
2015
 
 
2014
 
 
2013
 
Change in benefit obligation
                        
Benefit obligation at beginning of year
   $ 51,008     $ 41,528     $ 41,058  
Service cost
     0       383       455  
Interest cost
     1,979       2,054       1,768  
Participant contributions
     0       183       242  
Exchange rate changes
     (4,167
)
     5,359       (1,344
)
Benefits paid
     (2,152
)
     (1,693
)
     (1,817
)
Actuarial loss
     3,123       3,194       1,166  
Benefit obligation at end of year
   $ 49,791     $ 51,008     $ 41,528  
                         
Weighted average assumptions - benefit obligation
                        
Discount rate
     3.90
%
     4.30
%
     4.70
%
Rate of compensation increase
  
n/a
    
n/a
       3.10
%
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
   $ 38,295     $ 32,118     $ 30,590  
Actual return on plan assets
     3,740       2,444       2,920  
Employer contributions
     1,179       1,148       1,222  
Participant contributions
     0       183       242  
Benefits paid
     (2,152
)
     (1,693
)
     (1,817
)
Exchange rate changes
     (3,128
)
     4,095       (1,039
)
Fair value of plan assets at end of year
     37,934       38,295       32,118  
Funded status at end of year   $ (11,857 )   $ (12,713 )     (9,410 )
Amounts recognized in balance sheet
                        
Current liability
                   $ —  
Noncurrent liability
     (11,857
)
     (12,713
)
     (9,410
)
Net amount recognized in balance sheet
   $ (11,857
)
   $ (12,713
)
   $ (9,410
)
                         
Weighted average assumptions – net periodic benefit cost
                        
                         
Discount rate
     4.30
%
     4.70
%
     4.40
%
Rate of compensation increase
  
n/a
       3.10
%
     2.60
%
Return on plan assets
     5.45
%
     5.40
%
     4.90
%
                         
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
                        
Prior service cost
   $ —     $ —     $ —  
Accumulated loss
     (4,978
)
     (5,101
)
     (2,481
)
Amounts not yet recognized as a component of net periodic benefit cost
     (4,978
)
     (5,101
)
     (2,481
)
Accumulated net periodic benefit cost in excess of contributions
     (6,879
)
     (7,612
)
     (6,929
)
Net amount recognized
   $ (11,857
)
   $ (12,713
)
   $ (9,410
)
                         
Components of net periodic benefit cost
                        
Service cost
   $ -     $ 383     $ 455  
Interest cost
     1,979       2,054       1,768  
Expected return on plan assets
     (1,903
)
     (1,848
)
     (1,487
)
Amortization of net loss
     990       386          
Net periodic benefit cost
   $ 1,066     $ 975     $ 736  
                         
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
   $ 49,791     $ 51,008     $ 41,528  
Accumulated benefit obligation
     49,791       51,008       41,528  
Fair value of assets
     37,934       38,295       32,118  
US Plan [Member]  
Notes Tables  
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
 
 
2015
 
 
2014
 
 
2013
 
Change in benefit obligation
                        
Benefit obligation at beginning of year
   $ 110,054     $ 99,788     $ 104,537  
Service cost
     2,663       2,326       2,562  
Interest cost
     4,839       4,868       4,289  
Benefits paid
     (4,372
)
     (4,263
)
     (4,101
)
Actuarial (gain) loss
     3,214       7,335       (7,499
)
Benefit obligation at end of year
     116,398       110,054       99,788  
                         
Weighted average assumptions – benefit obligation
                        
Discount rate
     4.49
%
     4.29
%
     4.96
%
Rate of compensation increase
     2.64
%
     2.64
%
     2.64
%
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
   $ 84,629     $ 77,208     $ 76,778  
Actual return on plan assets
     (274
)
     11,661       3,958  
Employer contributions
     4,870       23       573  
Benefits paid
     (4,372
)
     (4,263
)
     (4,101
)
Fair value of plan assets at end of year
     84,853       84,629       77,208  
Funded status at end of year
   $ (31,545
)
   $ (25,425
)
   $ (22,580
)
                         
Amounts recognized in balance sheet
                        
Current liability
   $ (37
)
   $ (37
)
   $ (33
)
Noncurrent liability
     (31,508
)
     (25,388
)
     (22,547
)
Net amount recognized in balance sheet
   $ (31,545
)
   $ (25,425
)
   $ (22,580
)
                         
Weighted average assumptions – net periodic benefit cost
                        
Discount rate
     4.29
%
     4.96
%
     3.92
%
Rate of compensation increase
     2.64
%
     2.64
%
     2.64
%
Return on plan assets
     6.00
%
     6.00
%
     6.00
%
                         
Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive loss
                        
Prior service cost
   $ 0     $ 0     $ (116
)
Accumulated loss
     (11,817
)
     (3,585
)
     (3,438
)
Amounts not yet recognized as a component of net periodic benefit cost
     (11,817
)
     (3,585
)
     (3,554
)
Accumulated contributions less than net periodic benefit cost
     (19,728
)
     (21,840
)
     (19,026
)
Net amount recognized
   $ (31,545
)
   $ (25,425
)
   $ (22,580
)
                         
Components of net periodic benefit cost
                        
Service cost
   $ 2,663     $ 2,326     $ 2,562  
Interest cost
     4,839       4,868       4,289  
Expected return on plan assets
     (5,063
)
     (4,484
)
     (4,474
)
Amortization of prior service cost
     0       116       234  
Recognized actuarial loss
     319       12       -  
Net periodic benefit cost
   $ 2,758     $ 2,838     $ 2,611  
                         
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
                        
Prior service cost
   $ 0     $ (30
)
   $ (127
)
Net loss
     (53
)
     0       0  
                         
Information for plan with accumulated benefits in excess of plan assets
                        
Projected benefit obligation
   $ 116,398     $ 110,054     $ 99,788  
Accumulated benefit obligation
     109,383       103,155       93,066  
Fair value of assets
     84,853       84,629       77,208  
US and UK Plans Combined [Member]  
Notes Tables  
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
 
 
2015
 
 
2014
 
 
2013
 
Change in benefit obligation
                        
Benefit obligation at beginning of year
   $ 161,062     $ 141,316     $ 145,595  
Service cost
     2,663       2,709       3,017  
Interest cost
     6,818       6,922       6,057  
Participant contributions
     0       183       242  
Exchange rate changes
     (4,167
)
     5,359       (1,344
)
Benefits paid
     (6,524
)
     (5,956
)
     (5,918
)
Actuarial (gain) loss
     6,337       10,529       (6,333
)
Benefit obligation at end of year
     166,189       161,062       141,316  
                         
Change in plan assets
                        
Fair value of plan assets at beginning of year
     122,924       109,326       107,368  
Actual return on plan assets
     3,466       14,105       6,878  
Employer contributions
     6,049       1,171       1,795  
Participant contributions
     0       183       242  
Benefits paid
     (6,524
)
     (5,956
)
     (5,918
)
Exchange rate changes
     (3,128
)
     4,095       (1,039
)
Fair value of plan assets at end of year
     122,787       122,924       109,326  
                         
Funded status at end of year   $ (43,402 )   $ (38,138 )   $ (31,990 )
Amounts recognized in balance sheet
                        
Current liability
   $ (37
)
   $ (37
)
   $ (33
)
Noncurrent liability
     (43,365
)
     (38,101
)
     (31,957
)
Net amount recognized in balance sheet
   $ (43,402
)
   $ (38,138
)
   $ (31,990
)
                         
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss
                        
Prior service cost
   $ 0     $ 0     $ (116
)
Accumulated loss
     (16,795
)
     (8,686
)
     (5,919
)
Amounts not yet recognized as a component of net periodic benefit cost
     (16,795
)
     (8,686
)
     (6,035
)
Accumulated net periodic benefit cost in excess of contributions
     (26,607
)
     (29,452
)
     (25,955
)
Net amount recognized
   $ (43,402
)
   $ (38,138
)
   $ (31,990
)
                         
Components of net periodic benefit cost
                        
Service cost
   $ 2,663     $ 2,709     $ 3,017  
Interest cost
     6,818       6,922       6,057  
Expected return on plan assets
     (6,966
)
     (6,332
)
     (5,961
)
Amortization of prior service cost
     0       116       234  
Recognized actuarial loss
     1,309       398       0  
Net periodic benefit cost
   $ 3,824     $ 3,813     $ 3,347  
                         
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
                        
Prior service cost
   $ 0     $ (30
)
   $ (127
)
Net loss
     (53
)
     0       0  
                         
Information for pension plans with accumulated benefits in excess of plan assets
                        
Projected benefit obligation
   $ 166,189     $ 161,062     $ 141,316  
Accumulated benefit obligation
     159,174       154,163       134,594  
Fair value of assets
     122,787       122,924       109,326  
Schedule of Allocation of Plan Assets [Table Text Block]
 
 
2015
 
 
2014
 
Asset category:
                
Cash equivalents
     1
%
     1
%
Fixed income
     17
%
     14
%
Equities
     25
%
     24
%
Mutual and pooled funds
    57
%
     61
%
      100
%
     100
%
Schedule of Portfolio By Valuation Category [Table Text Block]
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
%
June 30,
2014
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Asset Category
 
Level 1
 
 
Level 2
 
 
Level 3
 
 
Total
 
 
%
 
Cash Equivalent
   $ 1,105                     $ 1,105       1
%
Fixed Income
             16,791               16,791       14
%
Equities
     26,210       3,428               29,638       24
%
Mutual & Pooled Funds
     37,563       33,932       3,895       75,390       61
%
Total
   $ 64,878     $ 54,151     $ 3,895     $ 122,924       100
%
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]
 
 
Fair Value Measurement Using
Significant Unobservable Inputs
(Level 3)
 
 
 
2015
 
 
2014
 
                 
Beginning balance
   $ 3,895     $ 3,008  
Actual returns on assets
     507       490  
Translation gain (loss)
     (318
)
     397  
                 
Ending balance
   $ 4,084     $ 3,895  
Schedule of Medical and Life Insurance Benefits [Table Text Block]
 
 
2015
 
 
2014
 
 
2013
 
Change in benefit obligation:
                        
Benefit obligation at beginning of year
   $ 5,867     $ 10,964     $ 14,230  
Service cost
     113       225       484  
Interest cost
     244       396       518  
Plan amendments
     —       (5,730
)
     —  
Benefits paid
     (647
)
     (429
)
     (351
)
Actuarial (gain) loss
     1,034       441       (3,917
)
Benefit obligation at end of year
   $ 6,611     $ 5,867     $ 10,964  
                         
Weighted average assumptions: benefit obligations
                        
Discount rate
     4.49
%
     4.29
%
     4.96
%
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
     647       429       351  
Benefits paid, net of employee contributions
     (647
)
     (429
)
     (351
)
Fair value of plan assets at end of year
     —       —       —  
                         
Amounts recognized in balance sheet
                        
Current postretirement benefit obligation
   $ (441
)
   $ (379
)
   $ (536
)
Non-current postretirement benefit obligation
     (6,170
)
     (5,488
)
     (10,428
)
Net amount recognized in balance sheet
   $ (6,611
)
   $ (5,867
)
   $ (10,964
)
                         
Weighted average assumptions – net periodic benefit cost
                        
Discount rate
     4.29
%
     4.96
%
     3.92
%
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
   $ 5,305     $ 6,104     $ 1,145  
Accumulated gain (loss)
     (850
)
     185       627  
Amounts not yet recognized as a component of net periodic benefit cost
     4,455       6,289       1,772  
Net periodic benefit cost in excess of accumulated contributions
     (11,066
)
     (12,156
)
     (12,736
)
Net amount recognized
   $ (6,611
)
   $ (5,867
)
   $ (10,964
)
                         
Components of net periodic benefit cost
                        
Service cost
   $ 113     $ 225     $ 484  
Interest cost
     244       396       518  
Amortization of prior service credit
     (799
)
     (771
)
     (743
)
Amortization of accumulated loss
     —       (1 )     111  
Net periodic benefit cost
   $ (442
)
   $ (151
)
   $ 370  
Estimated amounts that will be amortized from accumulated other comprehensive loss over the next year
                        
Prior service credit
  $ 781     $ 799     $ 502  
Net loss
     (15
)
     —       —  
    $ 766     $ 799     $ 502  
                         
                         
Healthcare cost trend rate assumed for next year
     8.50
%
     8.30
%
     7.80
%
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
  
2026
    
2026
    
2026
  
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
 
 
1% Increase
 
 
 
2015
 
 
2014
 
 
2012
 
Effect on total of service and interest cost
   $ 0     $ 35     $ 91  
Effect on postretirement benefit obligation
     4       7       1,041  
 
 
1% Decrease
 
 
 
2015
 
 
2014
 
 
2013
 
Effect on total of service and interest cost
   $ 0
)
   $ (30
)
   $ (77
)
Effect on postretirement benefit obligation
     (4
)
     (7
)
     (881
)
Schedule of Expected Benefit Payments [Table Text Block]
Fiscal Year
Pension
 
 
Other
Benefits
 
2016
       $ 6,647     $ 441  
2017
         7,008       370  
2018
         7,328       340  
2019
         7,685       336  
2020
         8,033       340  
2021
 - 2025     45,429       1,786