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Business and Accounting Policies Textuals (Details) | 12 Months Ended
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Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($)
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Company's domestic inventory relate to LIFO layers | 16.80% |  |
Number of LIFO pools maintained (in pools) | 5 |  |
Shipping, Handling and Transportation Costs | $ 19,320,000 | $ 20,060,000 | $ 21,480,000
Vesting period of SARs and stock option awards | 4 years |  |
Contractual Terms of SARs and stock option awards | 10 years |  |
Net other periodic post-employment costs | $ 245,000 | 796,000 | 981,000
Computer Software, Intangible Asset [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Finite-Lived Intangible Asset, Useful Life | 12 years |  |
Buildings,BuildingsImprovementsandLeaseholdImprovementsMinimumUsefulLife [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |
Buildings,BuildingsImprovementsandLeaseholdImprovements MaximumUsefulLife [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 30 years |  |
PropertyandEquipmentMinimumUsefulLife [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
PropertyandEquipmentMaximumUsefulLife [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |
Adjustments for New Accounting Principle, Early Adoption [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Defined Benefit Plan, Service Cost | $ 143,000 | 155,000 | 113,000
Net other periodic post-employment costs | 245,000 | 796,000 | 981,000
Reclassification of certain income tax effects to retained earnings, net amount | (471,000) | $ 0 | $ 0
Adjustments for New Accounting Pronouncement [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Reclassification of certain income tax effects to retained earnings, net amount | $ 471 |  |

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