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Business and Accounting Policies Textuals (Details) $ in Thousands | 12 Months Ended
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Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($)
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Accounts Receivable, Allowance for Credit Loss, Current | $ 13,661 | $ 10,498 |
Company's domestic inventory relate to LIFO layers | 17.30% |  |
Number of LIFO pools maintained (in pools) | 5 |  |
Revenue Recognition, Sales Returns Reserve | $ 9,883 | 7,265 |
Shipping and Handling Costs | $ 19,620 | 24,090 | $ 19,320
Vesting period of SARs and stock option awards | 4 years |  |
Contractual Terms of SARs and stock option awards | 10 years |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 50.00% |  |
Lessee, Operating Lease, Renewal Term | 5 years |  |
Operating lease assets, net | $ 90,636 | 0 |
Accounting Standards Update 2016-02 [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Operating lease assets, net | 83,533 |  |
Total operating lease liabilities | 89,778 |  |
Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | $ 3,275 |  |
Computer Software, Intangible Asset [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Finite-Lived Intangible Asset, Useful Life | 12 years |  |
Minimum [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Lessee, Operating Lease, Term of Contract | 1 year |  |
Maximum [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Lessee, Operating Lease, Term of Contract | 15 years |  |
Pension Plan [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ (116) | (34) | 149
Postretirement Health Coverage [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (257) | (418) | (452)
401(k) [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Defined Contribution Plan, Cost | 5,959 | 7,711 | 6,551
SERP [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 317 | 414 | 679
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months | 800 |  |
KERP [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Defined Contribution Plan, Cost | $ 189 | $ 400 | $ 359
Equipment [Member] | Minimum [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Equipment [Member] | Maximum [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |
Building and Building Improvements [Member] | Minimum [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |
Building and Building Improvements [Member] | Maximum [Member] |  |  |
Business and Accounting Policies (Textuals) [Abstract] |  |  |
Property, Plant and Equipment, Useful Life | 30 years |  |

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