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Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Preferred stock, par value	$ 0.50	$ 0.50
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common Stock
Common stock, par value	$ 0.50	$ 0.50
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares outstanding	36,952,762	36,825,128
Treasury stock, shares	4,823,988	4,823,988
Class B Common Stock
Common stock, par value	$ 0.50	$ 0.50
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares outstanding	5,381,132	5,275,838
Treasury stock, shares	48,263	48,263

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Face amount or stated value per share of common 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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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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