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Note 17 - Employee Benefit Plan (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
United States Pension Plan of US Entity [Member] | UNITED STATES      
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year $ 200 $ 200  
United States Pension Plan of US Entity [Member]      
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year 1,400    
Defined Benefit Plan, Net Periodic Benefit Cost $ 1,688 976 $ 1,959
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 4.00%    
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets 7.10%    
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months $ 17,100    
Defined Benefit Plan, Expected Future Benefit Payments, Year Two 17,100    
Defined Benefit Plan, Expected Future Benefit Payments, Year Three 17,200    
Defined Benefit Plan, Expected Future Benefit Payments, Year Four 17,400    
Defined Benefit Plan, Expected Future Benefit Payments, Year Five 17,200    
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter 89,100    
Postretirement Health Coverage [Member] | Maximum [Member]      
Defined Benefit Plan, Net Periodic Benefit Cost 100 100 100
Postretirement Health Coverage [Member]      
Pension Contributions $ 100 100  
Retirement Savings Plans [Member] | Salaried Employees [Member]      
Defined Contribution Plans Number of Plans 1    
Defined Contribution Plan Company Stock Held in Plan 84,000    
Defined Contribution Plan Company Stock, Percentage of Plan Assets 7.00%    
Retirement Savings Plans [Member] | Hourly Employees [Member]      
Defined Contribution Plans Number of Plans 1    
Retirement Savings Plans [Member]      
Defined Contribution Plans Number of Plans 2    
Defined Contribution Plan, Cost Recognized $ 4,000 3,800 $ 4,000
Defined Benefit Plan, Accumulated Benefit Obligation 310,400 $ 295,000  
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year 5,800    
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit) $ 100