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v3.23.1

Changes in Stock (Details) - shares | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Class of Stock [Line Items] |  |  |  |
Common stock, shares issued (in shares) | 4,937,000 | 4,138,000 | 4,937,000 | 4,138,000
Common Stock Class A [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Common stock, shares issued (in shares) | 3,935,581 |  | 3,935,581 |
Deferred Compensation Arrangement with Individual, Shares Issued | 34,000 | 18,000 |  |
Shares, Issued | 53,792,000 | 53,533,000 | 53,758,000 | 53,170,000
Common Stock Class A [Member] | Stock Investment Plan |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock Issued During Period, Shares, New Issues | 0 | 345,000 |  |
Common Stock Class B [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Common stock, shares issued (in shares) | 1,001,714 |  | 1,001,714 |
Deferred Compensation Arrangement with Individual, Shares Issued | 0 | 0 |  |
Shares, Issued | 1,002,000 | 1,002,000 | 1,002,000 | 1,002,000
Common Stock Class B [Member] | Stock Investment Plan |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock Issued During Period, Shares, New Issues | 0 | 0 |  |
Treasury Stock, Common [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Deferred Compensation Arrangement with Individual, Shares Issued | 0 | 0 |  |
Treasury Stock, Common [Member] | Stock Investment Plan |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock Issued During Period, Shares, New Issues | 0 | 0 |  |

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