CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025
Trade accounts receivable, allowances	$ 2,253	$ 2,167	$ 2,593
Treasury stock, shares	111	108	108
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	42,981	41,821	41,808
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	32,090	31,166	31,179