Debt - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Dec. 29, 2013
Line of Credit Facility [Line Items]
Unsecured revolving credit agreement	$ 200,000,000
Period of unsecured revolving credit agreement	5 years
Maturity date of senior notes	Sep. 21, 2016
Annual facility fee, percentage	0.175%
Outstanding borrowings on unsecured revolving credit agreement	60,000,000	55,000,000	5,000,000
Amount available to meet cash requirements under the revolving credit facility	140,000,000
Uncommitted Line of Credit Agreement	20,000,000
Uncommitted line of credit period 1	7 days
Uncommitted line of credit period 2	30 days
Uncommitted line of credit period 3	60 days
Uncommitted line of credit period 4	90 days
Outstanding borrowing on uncommitted line of credit	20,000,000	20,000,000	20,000,000
Uncommitted line of credit, weighted average interest rate	0.90%	0.94%	0.88%
Weighted average interest rate on debt and capital lease obligations spot rate	5.70%	5.70%	6.20%
Overall weighted average interest rate on debt and capital lease obligations	5.80%	5.70%
Debt and capital lease obligations subject to changes in short-term interest rates	80,000,000
Debt and capital lease obligations	515,700,000
Debt issued by subsidiaries	0
Guarantees of company debt	0
5.30% Senior Notes 2015 [Member]
Line of Credit Facility [Line Items]
Maturity date of senior notes	Apr. 30, 2015
Senior notes, amount	100,000,000	100,000,000	100,000,000
Maximum [Member]
Line of Credit Facility [Line Items]
Amount available for issuance of letters of credit from revolving credit facility	$ 25,000,000
Operating cash flow ratio	6.0
Minimum [Member]
Line of Credit Facility [Line Items]
Fixed charges ratio	1.5