Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Allowance for doubtful trade accounts receivable	$ 10,142	$ 9,169
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	80,533,536	80,533,536
Common stock, shares outstanding	63,202,053	65,790,112
Treasury stock, shares	17,331,483	14,743,424