Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Dec. 28, 2019	May 15, 2019
Goodwill and Other Intangible Assets
Amortization expense	$ 4,723	$ 4,491
Amortizable Intangible Assets
Gross Carrying Amount	373,690		$ 373,690
Accumulated Amortization	138,586		133,864
Net Carrying Amount	235,104		239,826
Unamortizable Intangible Assets
Goodwill	599,557		596,391
Future amortization expense
Remainder of fiscal 2019	14,200
2021	18,900
2022	18,900
2023	18,800
2024	18,800
2025	18,700
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
Trademarks
Amortizable Intangible Assets
Gross Carrying Amount	19,600		19,600
Accumulated Amortization	4,735		4,462
Net Carrying Amount	14,865		15,138
Customer relationship
Amortizable Intangible Assets
Gross Carrying Amount	354,090		354,090
Accumulated Amortization	133,851		129,402
Net Carrying Amount	$ 220,239		$ 224,688