CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Class B Common Stock	Common Stock Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Common Stock	Retained Earnings Class B Common Stock	Accumulated Other Comprehensive Loss	Treasury Stock - Common Stock Common Stock	Treasury Stock - Common Stock Class B Common Stock
Beginning Balance at Dec. 31, 2020	$ 512,990			$ 10,204	$ 2,860	$ 135,953	$ 544,280			$ (119,053)	$ (60,845)	$ (409)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	101,543						101,543
Other comprehensive income, net of tax	2,656									2,656
Cash dividends paid: Common Stock		$ (3,571)	$ (1,116)					$ (3,571)	$ (1,116)
Ending Balance at Jul. 02, 2021	612,502			10,204	2,860	135,953	641,136			(116,397)	(60,845)	(409)
Beginning Balance at Apr. 02, 2021	565,342			10,204	2,860	135,953	595,300			(117,721)	(60,845)	(409)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	48,180						48,180
Other comprehensive income, net of tax	1,324									1,324
Cash dividends paid: Common Stock		(1,786)	(558)					(1,786)	(558)
Ending Balance at Jul. 02, 2021	612,502			10,204	2,860	135,953	641,136			(116,397)	(60,845)	(409)
Beginning Balance at Dec. 31, 2021	711,786			10,204	2,860	135,953	724,486			(100,463)	(60,845)	(409)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	192,952						192,952
Other comprehensive income, net of tax	1,629									1,629
Cash dividends paid: Common Stock		(3,878)	(809)					(3,878)	(809)
Conversion of 1,227,546 shares of Class B Common Stock	0			1,227	(1,227)
Ending Balance at Jul. 01, 2022	901,680			11,431	1,633	135,953	912,751			(98,834)	(60,845)	(409)
Beginning Balance at Apr. 01, 2022	803,647			11,431	1,633	135,953	815,532			(99,648)	(60,845)	(409)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	99,562						99,562
Other comprehensive income, net of tax	814									814
Cash dividends paid: Common Stock		$ (2,092)	$ (251)					$ (2,092)	$ (251)
Ending Balance at Jul. 01, 2022	$ 901,680			$ 11,431	$ 1,633	$ 135,953	$ 912,751			$ (98,834)	$ (60,845)	$ (409)