CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts	$ 1,808	$ 5,310
Preferred Stock, Shares Authorized	5,000,000
Preferred Stock, Shares Outstanding	141,827
Common stock, par value	$ 1.50	$ 1.50
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	24,934,981	24,934,981
Common stock, shares outstanding	24,934,981	24,934,981
Treasury stock, shares	4,381,606	4,475,489
Convertible Series A Preferred Stock
Preferred Stock, Par value	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	180,000	180,000
Preferred Stock, Shares Issued	141,827	141,827
Preferred Stock, Shares Outstanding	135,000	135,000