CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Trade accounts receivable, allowances	$ 2,543	$ 2,245	$ 2,546
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	41,211	39,999	40,871
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	30,311	29,445	29,463