Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common [Member]	Total
Balance (in shares) at Dec. 31, 2023	7,082
Balance at Dec. 31, 2023	$ 7,441	$ 16,031	$ 344,245	$ 22	$ (11,483)	$ 356,256
Net earnings			12,645			12,645
Unrealized loss on available-for-sale securities, net of tax				(7)		(7)
Other (in shares)	18
Other		724	0		497	1,220
Dividends paid March 15, $1.00 per share regular, $3.50 per share extra			(32,029)			(32,029)
Other (in shares)	18
Other		724	0		497	1,220
Balance (in shares) at Jun. 30, 2024	7,100
Balance at Jun. 30, 2024	$ 7,441	16,755	324,861	14	(10,986)	338,085
Balance (in shares) at Mar. 31, 2024	7,098
Balance at Mar. 31, 2024	$ 7,441	16,496	318,766	21	(11,086)	331,638
Net earnings			6,077			6,077
Unrealized loss on available-for-sale securities, net of tax				(7)		(7)
Other (in shares)	2
Other		259	18		100	377
Other (in shares)	2
Other		259	18		100	377
Balance (in shares) at Jun. 30, 2024	7,100
Balance at Jun. 30, 2024	$ 7,441	16,755	324,861	14	(10,986)	338,085
Balance (in shares) at Dec. 31, 2024	7,103
Balance at Dec. 31, 2024	$ 7,441	17,298	353,659	35	(10,806)	367,627
Net earnings			12,762			12,762
Unrealized loss on available-for-sale securities, net of tax				(23)		(23)
Other (in shares)	0
Other		517	0		323	841
Dividends paid March 15, $1.00 per share regular, $3.50 per share extra			(7,142)			(7,142)
Other (in shares)	0
Other		517	0		323	841
Balance (in shares) at Jun. 29, 2025	7,103
Balance at Jun. 29, 2025	$ 7,441	17,815	359,279	13	(10,483)	374,065
Balance (in shares) at Mar. 31, 2025	7,103
Balance at Mar. 31, 2025	$ 7,441	17,550	354,127	22	(10,555)	368,585
Net earnings			5,152			5,152
Unrealized loss on available-for-sale securities, net of tax				(9)		(9)
Other		265			72	337
Other		265			72	337
Balance (in shares) at Jun. 29, 2025	7,103
Balance at Jun. 29, 2025	$ 7,441	$ 17,815	$ 359,279	$ 13	$ (10,483)	$ 374,065