Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock Common Class A	Common Stock Common Class B	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment
Balance at Dec. 28, 2019	$ 735,636		$ 94	$ 27	$ 571,784	$ (1,669)	$ 165,400
Balance (in shares) at Dec. 28, 2019			9,371,000	2,673,000
Net income	191,960						191,960
Stock options exercised and restricted shares activities	12,672		$ 1		12,671
Stock options exercised and restricted shares activities (in shares)			139,000
Stock-based compensation expense	15,282				15,282
Conversion from Class B to Class A			$ 5	$ (5)
Conversion from Class B to Class A (in shares)			495,000	(495,000)
Defined benefit plans liability adjustment, net of tax	1,392					1,392
Foreign currency translation adjustment	25					25
Balance at Dec. 26, 2020	956,967		$ 100	$ 22	599,737	(252)	357,360
Balance (ASU 2019-12) at Dec. 26, 2020		$ (55)						$ (55)
Balance (in shares) at Dec. 26, 2020			10,005,000	2,178,000
Net income	14,553						14,553
Stock options exercised and restricted shares activities	(6,729)		$ 1		(6,730)
Stock options exercised and restricted shares activities (in shares)			69,000
Stock-based compensation expense	18,615				18,615
Conversion from Class B to Class A			$ 1	$ (1)
Conversion from Class B to Class A (in shares)			110,000	(110,000)
Defined benefit plans liability adjustment, net of tax	90					90
Foreign currency translation adjustment	(32)					(32)
Balance at Dec. 25, 2021	983,409		$ 102	$ 21	611,622	(194)	371,858
Balance (in shares) at Dec. 25, 2021			10,184,000	2,068,000
Net income	67,263						67,263
Stock options exercised and restricted shares activities	$ 3,905				3,905
Stock options exercised and restricted shares activities (in shares)	30,164		54,000
Stock-based compensation expense	$ 13,988				13,988
Defined benefit plans liability adjustment, net of tax	253					(253)
Foreign currency translation adjustment	(269)					269
Balance at Dec. 31, 2022	$ 1,068,549		$ 102	$ 21	$ 629,515	$ (210)	$ 439,121
Balance (in shares) at Dec. 31, 2022			10,238,000	2,068,000