Investments in Affiliates and Discontinued Operations - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended	12 Months Ended
	Oct. 12, 2018	Jun. 29, 2018	Sep. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Equity in (earnings) loss of unconsolidated affiliate				$ (4,835)	$ (7,939)	$ 0
Remeasurement gain				0	2,289	0
Gain (loss) on sale of discontinued operations, net of tax				(70)	4,872	2,875
Income from discontinued operations, net of tax				0	0	11,291
Morningstar Foods, LLC
Business Acquisition [Line Items]
Gain (loss) on sale of discontinued operations, net of tax						2,900
Income from discontinued operations, net of tax						$ 11,300
Morningstar Foods, LLC | Tax Refund from Settlement of State Tax Claim
Business Acquisition [Line Items]
Gain (loss) on sale of discontinued operations, net of tax				$ 100	1,900
Morningstar Foods, LLC | Uncertain Tax Position Reserve Release
Business Acquisition [Line Items]
Gain (loss) on sale of discontinued operations, net of tax					3,000
Good Karma
Business Acquisition [Line Items]
Ownership interest (as a percent)		67.00%		69.00%
Additional investment	$ 3,000	$ 15,000
Fair value of equity interest		9,000
Remeasurement gain					2,300
Aggregate purchase price		35,700
Intangible assets acquired		$ 13,600
Weighted-average amortization period		10 years
Fair value of non-controlling interest		$ 11,800
Good Karma | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		2,900
Good Karma | Trademarks
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired		$ 10,700
Organic Valley Fresh Joint Venture
Business Acquisition [Line Items]
Ownership interest (as a percent)			50.00%
Equity in (earnings) loss of unconsolidated affiliate				$ (4,800)	$ (7,900)
Corporate Joint Venture | Organic Valley Fresh Joint Venture
Business Acquisition [Line Items]
Payments to acquire equity method investments			$ 2,000
Distributions from joint venture				5,600
Purchases from joint venture				$ 69,900