Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019	May 15, 2019
Goodwill and Other Intangible Assets
Amortization expense	$ 4,739	$ 4,601	$ 9,462	$ 9,092
Amortizable Intangible Assets
Gross Carrying Amount	374,190		374,190		$ 373,690
Accumulated Amortization	143,326		143,326		133,864
Net Carrying Amount	230,864		230,864		239,826
Unamortizable Intangible Assets
Goodwill	598,860		598,860		596,391
Future amortization expense
Remainder of fiscal 2020	9,400		9,400
2021	18,900		18,900
2022	18,900		18,900
2023	18,800		18,800
2024	18,800		18,800
2025	18,800		18,800
Clabber Girl Corporation
Unamortizable Intangible Assets
Goodwill						$ 11,956
Acquisitions.
Trademarks - indefinite-lived intangible assets						19,600
Customer relationship intangibles - finite-lived intangible assets						$ 18,500
Trademarks
Unamortizable Intangible Assets
Unamortizable intangible assets excluding goodwill	1,375,300		1,375,300		1,375,300
Trademarks
Amortizable Intangible Assets
Gross Carrying Amount	20,100		20,100		19,600
Accumulated Amortization	5,026		5,026		4,462
Net Carrying Amount	15,074		15,074		15,138
Customer relationship
Amortizable Intangible Assets
Gross Carrying Amount	354,090		354,090		354,090
Accumulated Amortization	138,300		138,300		129,402
Net Carrying Amount	$ 215,790		$ 215,790		$ 224,688