Borrowings - Additional Information (Detail)	1 Months Ended	6 Months Ended			6 Months Ended		12 Months Ended	6 Months Ended								6 Months Ended
	Mar. 28, 2014 Sumitomo Credit Facility	Apr. 03, 2015 Sumitomo Credit Facility USD ($)	Apr. 06, 2015 Sumitomo Credit Facility Subsequent Event USD ($)	Apr. 06, 2015 Sumitomo Credit Facility Subsequent Event JPY (¥)	Apr. 03, 2015 Two Thousand Thirteen Credit Agreement	Apr. 03, 2015 Two Thousand Thirteen Credit Agreement Two Thousand Thirteen Term Loan Facility USD ($)	Sep. 26, 2014 Two Thousand Thirteen Credit Agreement Two Thousand Thirteen Term Loan Facility USD ($)	Apr. 03, 2015 Two Thousand Thirteen Credit Agreement Two Thousand Thirteen Term Loan Facility Minimum	Apr. 03, 2015 Two Thousand Thirteen Credit Agreement Two Thousand Thirteen Term Loan Facility Maximum	Apr. 03, 2015 Two Thousand Thirteen Credit Agreement Revolving Credit Facility USD ($)	Apr. 03, 2015 Two Thousand Thirteen Credit Agreement Revolving Credit Facility Minimum	Apr. 03, 2015 Two Thousand Thirteen Credit Agreement Revolving Credit Facility Maximum	Apr. 03, 2015 Two Thousand Thirteen Credit Agreement Revolving Credit Facility Letter of Credit USD ($)	Apr. 03, 2015 Two Thousand Thirteen Credit Agreement Revolving Credit Facility Swing Line Loans USD ($)	Sep. 26, 2014 Revolving Credit Facility USD ($)	Apr. 03, 2015 2013 Revolving Credit Facility Revolving Credit Facility USD ($)	Sep. 26, 2014 2013 Revolving Credit Facility Revolving Credit Facility USD ($)
Line Of Credit Facility [Line Items]
Date of credit agreement					Aug. 27, 2013
Credit facility term						5 years				5 years
Loan facility, maximum borrowing capacity						$ 500,000,000				$ 300,000,000			$ 50,000,000	$ 25,000,000
Loan facility maximum commitment amount						100,000,000				200,000,000
Line of credit, interest rate								1.00%	1.25%		1.25%	1.50%
Margin added if base rate is based on federal funds rate						0.50%				0.50%
Percentage added to Eurodollar base rate before margin						1.00%				1.00%
Line of credit, interest rate calculation (base rate margin)								0.00%	0.25%		0.25%	0.50%
Debt, long-term and short-term, combined amount						412,500,000	437,500,000
Credit facility weighted average interest rate						1.30%	1.28%									1.55%
Line of credit, amount outstanding		$ 0	$ 25,200,000	¥ 3,000,000,000											$ 0	$ 100,000,000	$ 0
Percentage of voting rights pledged					65.00%
Sumitomo credit facility expiration date	Feb. 29, 2016
Credit facility accrued interest rate per annum		0.50%