Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	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	$ 7,441,000	$ 16,031,000	$ 344,245,000	$ 22,000	$ (11,483,000)	$ 356,256,000
Net earnings			6,568,000			6,568,000
Dividends paid March 15, $1.00 per share regular, $3.50 per share extra			(32,029,000)			(32,029,000)
Other (in shares)	16
Other		465,000	(18,000)		397,000	843,000
Balance (in shares) at Mar. 31, 2024	7,098
Balance at Mar. 31, 2024	$ 7,441,000	16,496,000	318,766,000	21,000	(11,086,000)	331,638,000
Balance (in shares) at Dec. 31, 2024	7,103
Balance at Dec. 31, 2024	$ 7,441,000	17,298,000	353,659,000	35,000	(10,806,000)	367,627,000
Net earnings			7,610,000			7,610,000
Dividends paid March 15, $1.00 per share regular, $3.50 per share extra			(7,142)			(7,142)
Other (in shares)	0
Other		252,000	0		251,000	503,000
Balance (in shares) at Mar. 30, 2025	7,103
Balance at Mar. 30, 2025	$ 7,441,000	17,550,000	354,127,000	22,000	(10,555,000)	368,585,000
Unrealized gain on available-for-sale securities, net of tax				$ (13,000)		$ (13,000)