Acquisitions - Narrative (Details) - Pineland Farms Potato Company, Inc. lb in Millions		3 Months Ended
	May 01, 2017 USD ($) a lb	Jul. 28, 2017 USD ($)
Business Acquisition [Line Items]
Potato processing capacity (in pounds) | lb	180
Farmland acquired (acres) | a	900
Cash paid	$ 115,811,000
Cash as potential earn-out consideration	25,000,000
Acquisition, additional cash as potential earn-out consideration	$ 23,746,000
Acquisition, consecutive performance period to achieve earn-out consideration	12 months
Acquisition, measurement period for earn-out consideration	24 months
Identifiable intangible assets	$ 35,491,000
Goodwill expected to be tax deductible	0
Business integration related costs		$ 557,000
Customer relationships
Business Acquisition [Line Items]
Identifiable intangible assets	$ 33,466,000
Amortization period	10 years
Trademark
Business Acquisition [Line Items]
Identifiable intangible assets	$ 2,025,000
Amortization period	20 years