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 July 2, 2023 (in shares) at Dec. 31, 2022	7,063
Balance July 2, 2023 at Dec. 31, 2022	$ 7,441	$ 14,798	$ 338,072	$ (103)	$ (12,156)	$ 348,052
Net earnings			21,400			21,400
Unrealized gain on available-for-sale securities, net of tax				28		28
Other (in shares)	19
Other		990	0		597	1,587
Unrealized gain on available-for-sale securities, net of tax				28		28
Dividends paid			(28,385)			(28,385)
Balance (in shares) at Oct. 01, 2023	7,082
Balance at Oct. 01, 2023	$ 7,441	15,788	331,087	(75)	(11,559)	342,682
Balance July 2, 2023 (in shares) at Jul. 01, 2023	7,079
Balance July 2, 2023 at Jul. 01, 2023	$ 7,441	15,540	324,068	(95)	(11,658)	335,296
Net earnings			7,019			7,019
Unrealized gain on available-for-sale securities, net of tax				20		20
Other (in shares)	3
Other		248	0		99	347
Unrealized gain on available-for-sale securities, net of tax				20		20
Balance (in shares) at Oct. 01, 2023	7,082
Balance at Oct. 01, 2023	$ 7,441	15,788	331,087	(75)	(11,559)	342,682
Balance July 2, 2023 (in shares) at Dec. 31, 2023	7,082
Balance July 2, 2023 at Dec. 31, 2023	$ 7,441	16,031	344,245	22	(11,483)	356,256
Net earnings			20,728			20,728
Unrealized gain on available-for-sale securities, net of tax				45		45
Other (in shares)	18
Other		979	0		597	1,576
Unrealized gain on available-for-sale securities, net of tax				45		45
Dividends paid			(32,029)			(32,029)
Balance (in shares) at Sep. 29, 2024	7,100
Balance at Sep. 29, 2024	$ 7,441	17,010	332,944	67	(10,886)	346,576
Balance July 2, 2023 (in shares) at Jun. 30, 2024	7,100
Balance July 2, 2023 at Jun. 30, 2024	$ 7,441	16,755	324,861	14	(10,986)	338,085
Net earnings			8,083			8,083
Unrealized gain on available-for-sale securities, net of tax				52		52
Other (in shares)	0
Other		255	0		100	356
Unrealized gain on available-for-sale securities, net of tax				52		52
Balance (in shares) at Sep. 29, 2024	7,100
Balance at Sep. 29, 2024	$ 7,441	$ 17,010	$ 332,944	$ 67	$ (10,886)	$ 346,576