CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Trade accounts receivable, allowances	$ 2,337	$ 2,184	$ 2,543
Treasury stock, shares	108	105	105
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	41,796	40,789	41,211
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	31,191	30,286	30,311