Borrowings - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2016 USD ($)	Oct. 02, 2015 USD ($)	Sep. 26, 2014 USD ($)	Sep. 30, 2016 JPY (¥)	Oct. 31, 2015 USD ($)	Aug. 27, 2013 USD ($)
Line Of Credit Facility [Line Items]
Interest paid on borrowings	$ 10,800,000	$ 7,100,000	$ 7,000,000
Future principal payments for long-term debt for next year	50,000,000
Future principal payments for long-term debt in two years	$ 287,500,000
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility
Line Of Credit Facility [Line Items]
Credit facility term (in years)	5 years
Loan facility, maximum borrowing capacity					$ 300,000,000	$ 500,000,000
Additional loan facility maximum commitment amount	$ 100,000,000
Line of credit facility, commitment fee amount	$ 300,000	$ 600,000	$ 600,000
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Minimum
Line Of Credit Facility [Line Items]
Line of credit maturity (in days)	30 days
Line of credit facility, commitment fee percentage	0.125%
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Maximum
Line Of Credit Facility [Line Items]
Line of credit facility, commitment fee percentage	0.20%
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Letter of Credit
Line Of Credit Facility [Line Items]
Loan facility, maximum borrowing capacity	$ 50,000,000
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Swing Line Loans
Line Of Credit Facility [Line Items]
Loan facility, maximum borrowing capacity	$ 25,000,000
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Eurodollar | Minimum
Line Of Credit Facility [Line Items]
Line of credit, basis spread on variable rate (as a percent)	1.125%
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Eurodollar | Maximum
Line Of Credit Facility [Line Items]
Line of credit, basis spread on variable rate (as a percent)	1.375%
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Federal Funds Rate
Line Of Credit Facility [Line Items]
Line of credit, basis spread on variable rate (as a percent)	0.50%
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Eurodollar
Line Of Credit Facility [Line Items]
Percentage added to Eurodollar base rate before margin	1.00%
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Eurodollar | Minimum
Line Of Credit Facility [Line Items]
Line of credit, basis spread on variable rate (as a percent)	0.125%
Two Thousand Thirteen Credit Agreement | 2013 Revolving Credit Facility | Eurodollar | Maximum
Line Of Credit Facility [Line Items]
Line of credit, basis spread on variable rate (as a percent)	0.375%
Two Thousand Thirteen Credit Agreement | 2013 Term Loan Facility
Line Of Credit Facility [Line Items]
Credit facility term (in years)	5 years
Loan facility, maximum borrowing capacity	$ 500,000,000
Additional loan facility maximum commitment amount	$ 100,000,000
Two Thousand Thirteen Credit Agreement | 2013 Term Loan Facility | Eurodollar | Minimum
Line Of Credit Facility [Line Items]
Line of credit, basis spread on variable rate (as a percent)	0.875%
Two Thousand Thirteen Credit Agreement | 2013 Term Loan Facility | Eurodollar | Maximum
Line Of Credit Facility [Line Items]
Line of credit, basis spread on variable rate (as a percent)	1.125%
Two Thousand Thirteen Credit Agreement | 2013 Term Loan Facility | Federal Funds Rate
Line Of Credit Facility [Line Items]
Line of credit, basis spread on variable rate (as a percent)	0.50%
Two Thousand Thirteen Credit Agreement | 2013 Term Loan Facility | Eurodollar
Line Of Credit Facility [Line Items]
Percentage added to Eurodollar base rate before margin	1.00%
Two Thousand Thirteen Credit Agreement | 2013 Term Loan Facility | Eurodollar | Maximum
Line Of Credit Facility [Line Items]
Line of credit, basis spread on variable rate (as a percent)	0.125%
Sumitomo Credit Facility
Line Of Credit Facility [Line Items]
Loan facility, maximum borrowing capacity | ¥				¥ 3,000,000,000.0
Line of credit, basis spread on variable rate (as a percent)	0.50%