Net Income Per Share (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Mar. 17, 2022 shares	Apr. 01, 2022 USD ($) $ / shares shares	Apr. 02, 2021 USD ($) $ / shares shares
Numerator for basic and diluted net income per Common Stock and Class B Common Stock share:
Net income		$ 93,390	$ 53,363
Less dividends:
Total undistributed earnings – basic		91,046	51,020
Total undistributed earnings – diluted		$ 91,046	$ 51,020
Diluted net income per share:
Percentage undistributed earnings allocated to common stock diluted		100.00%	100.00%
Anti-dilutive shares | shares		0	0
Common Stock
Less dividends:
Common Stock		$ 1,786	$ 1,785
Total undistributed earnings – basic		71,463	38,871
Total undistributed earnings – diluted		71,288	38,722
Numerator for basic net income per Common Stock share:
Numerator for basic net income per Common Stock share		73,249	40,656
Numerator for diluted net income per Common Stock share:
Numerator for diluted net income per Common Stock share		$ 93,390	$ 53,363
Denominator for basic net income per Common Stock and Class B Common Stock share:
Common Stock weighted average shares outstanding - basic (in shares) | shares		7,357,000	7,141,000
Denominator for diluted net income per Common Stock and Class B Common Stock share:
Common Stock weighted average shares outstanding - diluted (assuming conversion of Class B Common Stock to Common Stock) (in shares) | shares		9,396,000	9,409,000
Basic net income per share:
Common Stock (in dollars per share) | $ / shares		$ 9.96	$ 5.69
Diluted net income per share:
Common Stock (in dollars per share) | $ / shares		$ 9.94	$ 5.67
Class B Common Stock
Less dividends:
Common Stock		$ 558	$ 558
Total undistributed earnings – basic		19,583	12,149
Total undistributed earnings – diluted		19,758	12,298
Numerator for basic net income per Common Stock share:
Numerator for basic net income per Common Stock share		20,141	12,707
Numerator for diluted net income per Common Stock share:
Numerator for diluted net income per Common Stock share		$ 20,316	$ 12,856
Denominator for basic net income per Common Stock and Class B Common Stock share:
Common Stock weighted average shares outstanding - basic (in shares) | shares		2,016,000	2,232,000
Denominator for diluted net income per Common Stock and Class B Common Stock share:
Common Stock weighted average shares outstanding - diluted (assuming conversion of Class B Common Stock to Common Stock) (in shares) | shares		2,039,000	2,268,000
Basic net income per share:
Common Stock (in dollars per share) | $ / shares		$ 9.99	$ 5.69
Diluted net income per share:
Common Stock (in dollars per share) | $ / shares		$ 9.96	$ 5.67
Shares converted (in shares) | shares		1,227,546
Class B Common Stock | Converting Stockholders
Diluted net income per share:
Shares converted (in shares) | shares	1,227,546
Conversion ratio	1