CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Trade accounts receivable, allowances	$ 2,913	$ 2,245	$ 3,302
Treasury stock, shares	105	102	102
Common Stock
Common stock, par value (in dollars per share)	$ 0.694	$ 0.694	$ 0.694
Common stock, shares authorized	120,000	120,000	120,000
Common stock, shares issued	41,146	39,999	40,172
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.694	$ 0.694	$ 0.694
Common stock, shares authorized	40,000	40,000	40,000
Common stock, shares issued	30,299	29,445	29,452