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Note 9. Fair Value - Textuals (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis          
Gain (Loss) on Disposition of Property Plant Equipment $ (916)us-gaap_GainLossOnSaleOfPropertyPlantEquipment $ (344)us-gaap_GainLossOnSaleOfPropertyPlantEquipment      
Fair Value, Purchases or Sales of Level 3 Assets 0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales        
Fair Value, Transfers Between Levels, Amount 0kbal_FairValueTransfersBetweenLevelsAmount   0kbal_FairValueTransfersBetweenLevelsAmount    
Property, Plant and Equipment, Other Types          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis          
Gain (Loss) on Disposition of Property Plant Equipment 200us-gaap_GainLossOnSaleOfPropertyPlantEquipment
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= us-gaap_PropertyPlantAndEquipmentOtherTypesMember
  200us-gaap_GainLossOnSaleOfPropertyPlantEquipment
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= us-gaap_PropertyPlantAndEquipmentOtherTypesMember
   
Property, Plant and Equipment, Other Types | Fair Value, Measurements, Nonrecurring          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis          
Impairment of Long-Lived Assets to be Disposed of   $ 1,200us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= us-gaap_PropertyPlantAndEquipmentOtherTypesMember
$ 1,100us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= us-gaap_PropertyPlantAndEquipmentOtherTypesMember
$ 1,100us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= us-gaap_PropertyPlantAndEquipmentOtherTypesMember
$ 0us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= us-gaap_PropertyPlantAndEquipmentOtherTypesMember