Long-Term Debt (Details Textual) - USD ($)	12 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013	Dec. 31, 2014
Line of Credit Facility [Line Items]
Long-term debt	$ 755,500,000	$ 609,800,000
Maximum capacity under credit facility	$ 750,000,000.0
Credit agreement provides for facility fees Minimum	0.12%
Credit agreement provides for facility fees Maximum	0.25%
Uncommitted credit line facility	$ 5,000,000.0
Incremental line of credit for standby letters of credit	2,000,000.0
Total capital leases	8,600,000
Capital leases, current	1,200,000
Available capacity under credit facility	750,000,000
Remaining borrowing capacity under credit facility	588,200,000
Interest expense	24,000,000	19,100,000	$ 20,900,000
Long-term debt, maturities, repayments of principal in 2016	10,000,000
Long-term debt, maturities, repayments of principal in 2017	115,000,000
Long-term debt, maturities, repayments of principal in 2018	170,500,000
Long-term debt, maturities, repayments of principal in 2019	175,000,000
Long-term debt, maturities, repayments of principal in 2020	100,000,000
Long-term debt, maturities, repayments of principal after 2020	195,000,000
Revolving credit facility
Line of Credit Facility [Line Items]
Available capacity under credit facility	750,000,000	750,000,000
Letter of credit
Line of Credit Facility [Line Items]
Letter of credit, outstanding	12,800,000
Uncommitted Credit Line
Line of Credit Facility [Line Items]
Letter of credit, outstanding	0	$ 0
Senior notes | Senior unsecured notes due December 4, 2019 and December 6, 2021
Line of Credit Facility [Line Items]
Debt instrument, face amount				$ 125,000,000.0
Senior notes | 2.61% Senior Notes due December 2019
Line of Credit Facility [Line Items]
Debt instrument, face amount				$ 30,000,000.0
Interest rate				2.61%
Senior notes | 3.09% Senior Notes due December 2021
Line of Credit Facility [Line Items]
Debt instrument, face amount				$ 95,000,000.0
Interest rate				3.09%
Term loans
Line of Credit Facility [Line Items]
Long-term debt	$ 200,000,000.0