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Stock-Based Compensation (Narrative) (Details) - USD ($) |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
May 13, 2019 | Oct. 16, 2013 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Stock Based Compensation [Abstract] |  |  |  |  |  |  |
Stock-Based Compensation expense |  |  | $ 0 | $ 0 | $ 0 | $ 0 |
Stock options granted |  |  |  |  | 0 |  | 0
Stock options outstanding |  |  | 0 |  | 0 |  |
Stock options exercise price description |  | may not be exercised at a price which is less than 100% of the fair market value of shares at the date of grant |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |
Stock Based Compensation [Abstract] |  |  |  |  |  |  |
Stock-Based Compensation expense |  |  | $ 338,000 | 357,000 | $ 677,000 | 700,000 |
Recognized tax benefits |  |  | $ 37,000 | $ 33,000 | $ 74,000 | $ 64,000 |
Class A Common Stock | Stock Option [Member] |  |  |  |  |  |  |
Stock Based Compensation [Abstract] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  | 990,000 |  |  |  |  |
Class A Common Stock | Incentive Compensation Plan [Member] |  |  |  |  |  |  |
Stock Based Compensation [Abstract] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  | 620,000 |  |  |  |  |
Class A Common Stock | Convert For Class B [Member] |  |  |  |  |  |  |
Stock Based Compensation [Abstract] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  | 370,000 |  |  |  |  |
Class B Common Stock |  |  |  |  |  |  |
Stock Based Compensation [Abstract] |  |  |  |  |  |  |
Increase in number of common stock shares authorized | 90,000 |  |  |  |  |  |
Class B Common Stock | Stock Option [Member] |  |  |  |  |  |  |
Stock Based Compensation [Abstract] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  | 370,000 |  |  |  |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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