Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 27, 2017	Oct. 28, 2016	Oct. 27, 2017	Oct. 28, 2016	Apr. 28, 2017	Sep. 18, 2017	May 01, 2017
Accounting Policies [Line Items]
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01		$ 0.01	$ 0.01
Sale price (in dollars per share)						$ 77.00
Termination fee						$ 50,000,000
Cost of goods sold	$ 82,920,000	$ 62,881,000	$ 158,746,000	$ 120,301,000
Promotional spending	23,377,000	19,330,000	41,257,000	35,621,000
Advertising and marketing costs	5,313,000	3,543,000	8,377,000	6,782,000
Distribution costs	5,373,000	4,674,000	10,736,000	8,623,000
Selling costs	4,257,000	4,099,000	8,690,000	7,813,000
Allowance for doubtful accounts receivable	401,000		401,000		$ 269,000
Accounts receivable reduction related to sales promotions	7,063,000		7,063,000		8,055,000
Raw materials and supplies	12,793,000		12,793,000		6,037,000
Finished goods	16,916,000		16,916,000		11,173,000
Depreciation	6,607,000	5,684,000	13,152,000	10,779,000
Current assets held for sale	3,334,000		3,334,000		3,334,000
Goodwill	99,829,000		99,829,000		19,634,000
Impairment of goodwill			0		0
Other intangible assets, net	35,167,000		35,167,000		39,000
Amortization of intangible assets	$ 936,000	$ 39,000	$ 1,837,000	$ 78,000
Dilutive shares not included in computation of dilutive earnings per share (in shares)	38,722	337,218	33,952	326,605
Quarterly dividend payment (in dollars per share)	$ 0.34
Cash dividends (in dollars per share)	$ 0.34	$ 0.34	$ 8.18	$ 0.68
Special dividend cash paid (in dollars per share)			$ 7.50
Accrued non-income taxes	$ 1,126,000		$ 1,126,000		3,353,000
Self-insurance reserves, noncurrent	1,991,000		1,991,000		2,814,000
Self-insurance reserves	6,820,000		$ 6,820,000		$ 10,692,000
Building and Improvements | Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful lives			5 years
Building and Improvements | Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful lives			25 years
Machinery and Equipment | Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful lives			3 years
Machinery and Equipment | Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful lives			10 years
Pineland Farms Potato Company, Inc.
Accounting Policies [Line Items]
Goodwill							$ 80,195,000
Pineland Farms Potato Company, Inc. | Trade Names
Accounting Policies [Line Items]
Economic useful life			20 years
Pineland Farms Potato Company, Inc. | Customer relationships
Accounting Policies [Line Items]
Economic useful life			10 years
Restatement Adjustment
Accounting Policies [Line Items]
Cost of goods sold	$ 27,227,000	$ 22,656,000	$ 52,751,000	$ 42,062,000