Net Income Per Share - Summary of Computation of Basic Net Income Per Share and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 18, 2024	Jun. 28, 2024	Jun. 30, 2023	Jun. 28, 2024	Jun. 30, 2023	Jun. 21, 2024
Numerator for basic and diluted net income per Common Stock and Class B Common Stock share:
Net income		$ 172,812	$ 122,319	$ 338,553	$ 240,446
Less dividends:
Total undistributed earnings – basic		168,125	117,632	179,200	202,951
Total undistributed earnings – diluted		168,125	117,632	$ 179,200	$ 202,951
Diluted net income per share:
Percentage undistributed earnings allocated to common stock diluted (as a percent)				100.00%	100.00%
Anti-dilutive shares (in shares)				0	0
Tender Offer
Diluted net income per share:
Shares repurchased (in shares)	14,391.5
Purchase Agreement | Carolina Coca-Cola Bottling Investments
Diluted net income per share:
Share repurchase program, authorized, number of shares (in shares)						598,619
Common Stock
Less dividends:
Common Stock		4,185	4,185	$ 142,273	$ 33,476
Total undistributed earnings – basic		149,970	105,021	159,918	181,192
Total undistributed earnings – diluted		149,745	104,775	159,678	180,768
Numerator for basic net income per Common Stock share:
Numerator for basic net income per Common Stock share		154,155	109,206	302,191	214,668
Numerator for diluted net income per Common Stock share:
Numerator for diluted net income per Common Stock share		$ 172,812	$ 122,319	$ 338,553	$ 240,446
Denominator for basic net income per Common Stock and Class B Common Stock share:
Common Stock weighted average shares outstanding - basic (in shares)		8,302,000	8,369,000	8,335,000	8,369,000
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)		9,321,000	9,396,000	9,354,000	9,396,000
Basic net income per share:
Common Stock (in dollars per share)		$ 18.57	$ 13.05	$ 36.26	$ 25.65
Diluted net income per share:
Common Stock (in dollars per share)		$ 18.54	$ 13.02	$ 36.19	$ 25.59
Class B Common Stock
Less dividends:
Common Stock		$ 502	$ 502	$ 17,080	$ 4,019
Total undistributed earnings – basic		18,155	12,611	19,282	21,759
Total undistributed earnings – diluted		18,380	12,857	19,522	22,183
Numerator for basic net income per Common Stock share:
Numerator for basic net income per Common Stock share		18,657	13,113	36,362	25,778
Numerator for diluted net income per Common Stock share:
Numerator for diluted net income per Common Stock share		$ 18,882	$ 13,359	$ 36,602	$ 26,202
Denominator for basic net income per Common Stock and Class B Common Stock share:
Common Stock weighted average shares outstanding - basic (in shares)		1,005,000	1,005,000	1,005,000	1,005,000
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)		1,019,000	1,027,000	1,019,000	1,027,000
Basic net income per share:
Common Stock (in dollars per share)		$ 18.56	$ 13.05	$ 36.18	$ 25.65
Diluted net income per share:
Common Stock (in dollars per share)		$ 18.53	$ 13.01	$ 35.92	$ 25.51