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Stock-Based Compensation (Narrative) (Details) - USD ($) |  |  | 3 Months Ended
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May 13, 2019 | Oct. 16, 2013 | Mar. 31, 2023 | Mar. 31, 2022
Stock Based Compensation [Abstract] |  |  |  |
Stock-Based Compensation expense |  |  | $ 0 | $ 0
Stock options granted |  |  | 0 | 0
Stock options outstanding |  |  | 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 |  |  |  |
Stock Based Compensation [Abstract] |  |  |  |
Stock-Based Compensation expense |  |  | $ 245,000 | $ 339,000
Recognized tax benefits |  |  | $ 64,000 | $ 37,000
Class A Common Stock | Stock Option |  |  |  |
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 |  |  |  |
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 |  |  |  |
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 |  |  |  |
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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- Definition Gross number of share options (or share units) granted during the period. + 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 (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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