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Income Taxes (Narrative) (Details) - USD ($) | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
--- | --- | --- | ---
Income Tax Disclosure [Abstract] |  |  |
Gross tax contingency reserve | $ 1,253,000 | $ 968,000 | $ 1,670,000
Accrued tax liabilities included in the gross tax contingency reserve | 800,000 |  |
Accrued interest and penalties included in the gross tax contingency reserve | 529,000 | 481,000 |
Gross tax contingency reserve, classified as current liabilities | 0 |  |
Gross tax contingency reserve, classified as noncurrent liabilities | 1,253,000 | 968,000 |
Federal [Member] |  |  |
Income Tax Authority [Line Items] |  |  |
Prepaid income taxes | 5,100,000 | $ 5,300,000 |
State and Local Jurisdiction |  |  |
Income Tax Authority [Line Items] |  |  |
Prepaid income taxes | $ 1,100,000 |  |

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