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Income Taxes (Narrative) (Details) - USD ($) | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021
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Income Tax Disclosure [Abstract] |  |  |
Gross tax contingency reserve | $ 858,000 | $ 925,000 | $ 1,253,000
Accrued tax liabilities included in the gross tax contingency reserve | 400,000 |  |
Accrued interest and penalties included in the gross tax contingency reserve | 494,000 | 507,000 |
Gross tax contingency reserve, classified as current liabilities | 0 |  |
Gross tax contingency reserve, classified as noncurrent liabilities | 858,000 | 925,000 |
Federal [Member] |  |  |
Income Tax Authority [Line Items] |  |  |
Prepaid income taxes | 3,300,000 |  |
State and Local Jurisdiction |  |  |
Income Tax Authority [Line Items] |  |  |
Prepaid income taxes | $ 800,000 | $ 1,900,000 |

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