Long-Term Debt and Credit Arrangements - Narrative (Details)		3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 28, 2017 USD ($)	Oct. 27, 2017 USD ($)	Oct. 28, 2016	Oct. 27, 2017 USD ($)	Oct. 28, 2016	Apr. 28, 2017 USD ($)
Line of Credit Facility [Line Items]
Total borrowings	$ 2,695,000	$ 126,611,000		$ 126,611,000		$ 2,695,000
Effective interest rate		2.89%	2.23%	2.84%	2.35%
Revolving Credit Facility | Credit Facility
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity	300,000,000					$ 300,000,000
Debt instrument, term (in years)						5 years
Line of credit facility, borrowing increase	400,000,000					$ 400,000,000
Amortization of debt issuance costs	$ 1,542,000
Coverage ratio requirement (not less than)	3.00					3.00
Leverage ratio requirement (not to exceed)	3.50					3.50
Revolving Credit Facility | Credit Facility | Minimum
Line of Credit Facility [Line Items]
Commitment fee (as a percent)						0.20%
Revolving Credit Facility | Credit Facility | Maximum
Line of Credit Facility [Line Items]
Commitment fee (as a percent)						0.30%
Revolving Credit Facility | Credit Facility | Eurodollar
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate (as a percent)						1.00%
Revolving Credit Facility | Credit Facility | Eurodollar | Minimum
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate (as a percent)						1.25%
Revolving Credit Facility | Credit Facility | Eurodollar | Maximum
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate (as a percent)						2.00%
Revolving Credit Facility | Credit Facility | Base Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate (as a percent)						0.50%
Revolving Credit Facility | Credit Facility | Base Rate | Minimum
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate (as a percent)						0.25%
Revolving Credit Facility | Credit Facility | Base Rate | Maximum
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate (as a percent)						1.00%
Revolving Credit Facility | Credit Facility | Federal Funds Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate (as a percent)						0.50%
Revolving Credit Facility | Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate (as a percent)						1.50%
Standby Letters of Credit | Credit Facility
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity	$ 20,000,000					$ 20,000,000
Credit Agreement borrowings
Line of Credit Facility [Line Items]
Total borrowings	0	$ 124,119,000		$ 124,119,000		0
Revolving credit facility, maximum borrowing capacity		300,000,000		300,000,000
Credit Agreement borrowings | Standby Letters of Credit
Line of Credit Facility [Line Items]
Letters of credit outstanding, amount		4,414,000		4,414,000
R&D Loan
Line of Credit Facility [Line Items]
Total borrowings	1,801,000	1,588,000		1,588,000		1,801,000
Loans payable		3,000,000		3,000,000
Interest-free loan
Line of Credit Facility [Line Items]
Total borrowings	$ 894,000	904,000		904,000		$ 894,000
Loans payable		$ 1,000,000		$ 1,000,000
Debt instrument, term (in years)				10 years