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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Thousands	Dec. 31, 2021	Dec. 31, 2020
Stockholders' equity
Preferred Stock, shares authorized (in shares)	1,000	1,000
Preferred Stock, shares issued (in shares)	0	0
Common Stock [Member]
Stockholders' equity
Capital Stock, par value (in dollars per share)	$ 1	$ 1
Common Stock, shares authorized (in shares)	50,000	50,000
Common Stock, shares issued (in shares)	29,907	29,600
Treasury Stock, shares (in shares)	14,069	12,862
Convertible Class A Common Stock [Member]
Stockholders' equity
Common Stock, shares authorized (in shares)	15,000	15,000
Common Stock, shares issued (in shares)	1,809	1,996
Treasury Stock, shares (in shares)	522	522

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Face amount or stated value per share of capital stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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