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Note 4 - Property, plant and equipment (Details) - Property, plant and equipment (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Jun. 30, 2012
Note 4 - Property, plant and equipment (Details) - Property, plant and equipment [Line Items]    
Property, plant and equipment $ 234,229 $ 212,428
Less accumulated depreciation 139,209 129,865
Property, plant and equipment - net 95,020 82,563
Land, Buildings And Leasehold Improvements [Member]
    
Note 4 - Property, plant and equipment (Details) - Property, plant and equipment [Line Items]    
Property, plant and equipment 77,690 69,933
Machinery, Equipment And Other [Member]
    
Note 4 - Property, plant and equipment (Details) - Property, plant and equipment [Line Items]    
Property, plant and equipment $ 156,539 $ 142,495