Net Income Per Share - Computation of Basic Net Income Per Share and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Numerator for basic and diluted net income per Common Stock and Class B Common Stock share:
Net income attributable to Coca-Cola Bottling Co. Consolidated	$ 25,164	$ 17,316	$ 7,046	$ 18,613
Less dividends:
Dividends on Common Stock	1,787	1,785	5,357	5,356
Total undistributed earnings – basic	22,821	14,983	32	11,618
Total undistributed earnings – diluted	22,821	14,983	32	11,618
Numerator for basic net income per Common Stock share:
Numerator for basic net income per Common Stock share	19,209	13,248	5,381	14,249
Numerator for diluted net income per Common Stock share:
Numerator for diluted net income per Common Stock share	$ 25,164	$ 17,316	$ 7,046	$ 18,613
Denominator for diluted net income per Common share:
Weighted average number of Common Stock shares outstanding	7,141	7,141	7,141	7,141
Denominator for diluted net income per Common share:
Weighted average number of Common Stock shares outstanding – assuming dilution	9,405	9,374	9,400	9,369
Basic net income per share:
Common Stock	$ 2.69	$ 1.86	$ 0.75	$ 2.00
Diluted net income per share:
Common Stock	$ 2.69	$ 1.85	$ 0.75	$ 1.99
Common Stock [Member]
Less dividends:
Total undistributed earnings – basic	$ 17,422	$ 11,463	$ 24	$ 8,893
Total undistributed earnings – diluted	17,327	11,414	24	8,855
Class B Common Stock [Member]
Less dividends:
Dividends on Common Stock	556	548	1,657	1,639
Total undistributed earnings – basic	5,399	3,520	8	2,725
Total undistributed earnings – diluted	5,494	3,569	8	2,763
Numerator for basic net income per Common Stock share:
Numerator for basic net income per Common Stock share	5,955	4,068	1,665	4,364
Numerator for diluted net income per Common Stock share:
Numerator for diluted net income per Common Stock share	$ 6,050	$ 4,117	$ 1,665	$ 4,402
Denominator for diluted net income per Common share:
Weighted average number of Common Stock shares outstanding	2,213	2,193	2,208	2,188
Denominator for diluted net income per Common share:
Weighted average number of Common Stock shares outstanding – assuming dilution	2,264	2,233	2,259	2,228
Basic net income per share:
Common Stock	$ 2.69	$ 1.86	$ 0.75	$ 2.00
Diluted net income per share:
Common Stock	$ 2.68	$ 1.84	$ 0.74	$ 1.97