CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Beginning Balance at Dec. 31, 2020	$ 272,643	$ 12,952	$ 188,032	$ 113,449	$ (51,419)	$ 9,629
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	39,806			39,806
Other comprehensive income (loss)	(3,324)					(3,324)
10% stock dividend	35,947	1,094	34,853	(35,947)
Exercise of stock options	2,019	90	1,929
Restricted stock grants		3	(3)
Stock based compensation	733		733
Dividends: Common Stock	(9,663)			(9,663)
Ending Balance at Dec. 31, 2021	302,214	14,139	225,544	107,645	(51,419)	6,305
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	40,423			40,447			$ (24)
Other comprehensive income (loss)	(30,565)					(30,565)
Contributions from noncontrolling interest	598						598
10% stock dividend	0
Exercise of stock options	1,565	70	1,495
Purchase of treasury stock	(8,838)				(8,838)
Stock based compensation	688		688
Dividends: Common Stock	(10,527)			(10,527)
Ending Balance at Dec. 31, 2022	295,558	14,209	227,727	137,565	(60,257)	(24,260)	574
Beginning balance at Dec. 31, 2022	294,984
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	30,009			30,037			(28)
Other comprehensive income (loss)	(1,062)					(1,062)
10% stock dividend	0
Exercise of stock options	698	29	669
Purchase of treasury stock	(11,227)				(11,227)
Restricted stock grants		4	(4)
Stock based compensation	594		594
Dividends: Common Stock	(10,724)			(10,724)
Ending Balance at Dec. 31, 2023	$ 303,846	$ 14,242	$ 228,986	$ 156,878	$ (71,484)	$ (25,322)	$ 546