Condensed 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. 26, 2020	$ 956,967	$ (54)	$ 100	$ 22	$ 599,737	$ (252)	$ 357,360	$ (54)
Balance (in shares) at Dec. 26, 2020			10,005,000	2,178,000
Net income	65,565						65,565
Stock options exercised and restricted shares activities	1,269		$ 1		1,268
Stock options exercised and restricted shares activities (in shares)			48,000
Stock-based compensation expense	4,957				4,957
Accounting Standards Update [Extensible List]		ASU 2019-12
Foreign currency translation adjustment	20					20
Balance at Mar. 27, 2021	1,028,724		$ 101	$ 22	605,962	(232)	422,871
Balance (in shares) at Mar. 27, 2021			10,053,000	2,178,000
Balance at Dec. 26, 2020	956,967	$ (54)	$ 100	$ 22	599,737	(252)	357,360	$ (54)
Balance (in shares) at Dec. 26, 2020			10,005,000	2,178,000
Net income	124,760
Foreign currency translation adjustment	35
Balance at Jun. 26, 2021	1,084,135		$ 102	$ 21	602,163	(217)	482,066
Balance (in shares) at Jun. 26, 2021			10,166,000	2,078,000
Balance at Mar. 27, 2021	1,028,724		$ 101	$ 22	605,962	(232)	422,871
Balance (in shares) at Mar. 27, 2021			10,053,000	2,178,000
Net income	59,195						59,195
Stock options exercised and restricted shares activities	(9,133)				(9,133)
Stock options exercised and restricted shares activities (in shares)			13,000
Stock-based compensation expense	5,334				5,334
Conversion from Class B to Class A			$ 1	$ (1)
Conversion from Class B to Class A (in shares)			100,000	(100,000)
Foreign currency translation adjustment	15					15
Balance at Jun. 26, 2021	1,084,135		$ 102	$ 21	602,163	(217)	482,066
Balance (in shares) at Jun. 26, 2021			10,166,000	2,078,000
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	(1,955)						(1,955)
Stock options exercised and restricted shares activities	498				498
Stock options exercised and restricted shares activities (in shares)			31,000
Stock-based compensation expense	2,922				2,922
Foreign currency translation adjustment	50					50
Balance at Mar. 26, 2022	984,924		$ 102	$ 21	615,042	(144)	369,903
Balance (in shares) at Mar. 26, 2022			10,215,000	2,068,000
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	$ 51,394
Stock options exercised and restricted shares activities (in shares)	17,592
Foreign currency translation adjustment	$ (21)
Balance at Jun. 25, 2022	1,044,037		$ 102	$ 21	620,877	(215)	423,252
Balance (in shares) at Jun. 25, 2022			10,225,000	2,068,000
Balance at Mar. 26, 2022	984,924		$ 102	$ 21	615,042	(144)	369,903
Balance (in shares) at Mar. 26, 2022			10,215,000	2,068,000
Net income	53,349						53,349
Stock options exercised and restricted shares activities	1,027				1,027
Stock options exercised and restricted shares activities (in shares)			10,000
Stock-based compensation expense	4,808				4,808
Foreign currency translation adjustment	(71)					(71)
Balance at Jun. 25, 2022	$ 1,044,037		$ 102	$ 21	$ 620,877	$ (215)	$ 423,252
Balance (in shares) at Jun. 25, 2022			10,225,000	2,068,000