CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Balance, beginning of period at Dec. 31, 2023	$ 382,340	$ 5,883	$ 1,566	$ 28,672	$ 355,873	$ (9,654)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	5,832	164		5,668
Purchase of treasury shares	(9,944)	(317)			(9,627)
Net income	33,741				33,741
Cash dividends on Class A and Class B common stock	(6,624)				(6,624)
Current period other comprehensive income, net of tax	(706)					(706)
Pension settlement, net of tax	0
Reclassification adjustment to net income, net of tax	308					308
Balance, end of period at Dec. 31, 2024	404,947	5,730	1,566	34,340	373,363	(10,052)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	8,280	193		8,087
Purchase of treasury shares	(2,534)	(62)			(2,472)
Net income	17,574				17,574
Conversion of Class B to Class A shares	0	3	(3)
Cash dividends on Class A and Class B common stock	(7,335)				(7,335)
Current period other comprehensive income, net of tax	1,888					1,888
Pension settlement, net of tax	6,033					6,033
Reclassification adjustment to net income, net of tax	390					390
Balance, end of period at Dec. 31, 2025	$ 429,243	$ 5,864	$ 1,563	$ 42,427	$ 381,130	$ (1,741)