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Consolidated Balance Sheets Unaudited (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Consolidated Balance Sheets [Abstract]
Properties and equipment, at cost, accumulated depreciation	$ 310,972	$ 293,380
Identifiable intangible assets, accumulated amortization	$ 55,138	$ 47,607
Capital stock - authorized	80,000,000	80,000,000
Capital stock - par value	$ 1	$ 1
Capital stock - issued	36,402,025	36,258,638
Treasury stock	21,073,917	20,351,562

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Face amount or stated value per share of common stock.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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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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