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Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value $ 122,924 $ 109,326  
% 100.00% 100.00%  
Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 1,105 1,416  
Cash Equivalents [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 1,105 1,416  
% 1.00% 1.00%  
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 16,791 15,307  
Fixed Income Securities [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 16,791 15,307  
% 14.00% 14.00%  
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 26,210 23,210  
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 3,428 2,475  
Equity Securities [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 29,638 25,685  
% 24.00% 24.00%  
Mutual And Pooled Funds [Member] | Fair Value, Inputs, Level 1 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 37,563 28,357  
Mutual And Pooled Funds [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 33,932 35,553  
Mutual And Pooled Funds [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 3,895 3,008  
Mutual And Pooled Funds [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 75,390 66,918  
% 61.00% 61.00%  
Fair Value, Inputs, Level 1 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 64,878 52,983  
Fair Value, Inputs, Level 2 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value 54,151 53,335  
Fair Value, Inputs, Level 3 [Member]
      
Note 12 - Employee Benefit and Retirement Plans (Details) - Portfolio by Valuation Category [Line Items]      
Fair Value $ 3,895 $ 3,008 $ 3,034