CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Class A Common Stock	Common Stock Common Stock	Common Stock Class A Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2022				30,006,000	1,806,000
Beginning balance at Dec. 31, 2022				$ 30,006	$ 1,806	$ (248,756)	$ 108,706	$ 398,393	$ (756)
Beginning balance (in shares) at Dec. 31, 2022						(15,662,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Class A Common Stock (in shares)				2,000
Conversion of Class A Common Stock				$ 2
Stock compensation transactions, net (in shares)				212,000
Stock compensation transactions, net				$ 212
Conversion to Common Stock (in shares)					(2,000)
Conversion to Common Stock					$ (2)
Directors' compensation plan (in shares)						12,000
Directors’ Compensation Plan						$ 197	880
Purchases (in shares)						(227,000)
Purchases						$ (6,895)
Shares issued under incentive plans, net							(4,289)
Stock-based compensation expense							8,010
Net income	$ 56,319							56,319
Cash dividends per share: Common Stock: 2025 – $1.29; 2024 - $1.26; and 2023 – $2.18 Class A Common Stock: 2025 - $1.21; 2024 - $1.18; and 2023– $2.05		$ (32,612)	$ (2,628)					(35,240)
Pension liabilities adjustment, net of taxes	(227)								(227)
Ending balance (in shares) at Dec. 31, 2023				30,220,000	1,804,000
Ending balance (in shares) at Dec. 31, 2023			(522,000)			(15,877,000)
Ending balance at Dec. 31, 2023	308,366			$ 30,220	$ 1,804	$ (255,454)	113,307	419,472	(983)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Class A Common Stock (in shares)				11,000
Conversion of Class A Common Stock				$ 11
Stock compensation transactions, net (in shares)				188,000
Stock compensation transactions, net				$ 188
Conversion to Common Stock (in shares)					(11,000)
Conversion to Common Stock					$ (11)
Directors' compensation plan (in shares)						74,000
Directors’ Compensation Plan						$ 446	691
Purchases (in shares)						(215,000)
Purchases						$ (4,991)
Shares issued under incentive plans, net							(3,483)
Stock-based compensation expense							6,742
Net income	19,956							19,956
Cash dividends per share: Common Stock: 2025 – $1.29; 2024 - $1.26; and 2023 – $2.18 Class A Common Stock: 2025 - $1.21; 2024 - $1.18; and 2023– $2.05		$ (18,963)	$ (1,505)					(20,468)
Pension liabilities adjustment, net of taxes	114								114
Ending balance (in shares) at Dec. 31, 2024				30,419,000	1,793,000
Ending balance (in shares) at Dec. 31, 2024		(15,496,000)	(522,000)			(16,018,000)
Ending balance at Dec. 31, 2024	307,561			$ 30,419	$ 1,793	$ (259,999)	117,257	418,960	(869)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Class A Common Stock (in shares)				61,000
Conversion of Class A Common Stock				$ 61
Stock compensation transactions, net (in shares)				153,000
Stock compensation transactions, net				$ 153
Conversion to Common Stock (in shares)					(61,000)
Conversion to Common Stock					$ (61)
Directors' compensation plan (in shares)						13,000
Directors’ Compensation Plan						$ 226	868
Purchases (in shares)						(216,000)
Purchases						$ (4,778)
Shares issued under incentive plans, net							(2,063)
Stock-based compensation expense							7,311
Net income	19,730							19,730
Cash dividends per share: Common Stock: 2025 – $1.29; 2024 - $1.26; and 2023 – $2.18 Class A Common Stock: 2025 - $1.21; 2024 - $1.18; and 2023– $2.05		$ (19,346)	$ (1,491)					(20,837)
Pension liabilities adjustment, net of taxes	(242)								(242)
Ending balance (in shares) at Dec. 31, 2025				30,633,000	1,732,000
Ending balance (in shares) at Dec. 31, 2025		(15,699,000)	(522,000)			(16,221,000)
Ending balance at Dec. 31, 2025	$ 307,929			$ 30,633	$ 1,732	$ (264,551)	$ 123,373	$ 417,853	$ (1,111)