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Long-Term Debt (Details) - USD ($)		12 Months Ended
Long-Term Debt (Details) - USD ($)	Sep. 29, 2014	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015	Dec. 14, 2016	Jan. 08, 2016
Debt Instrument [Line Items]
Long-term portion of capital lease obligations acquisition		$ 0	$ 71,000
Total long-term debt		0	185,071,000
Interest expense		3,300,000	3,500,000	$ 600,000
Revolving Credit Facility [Member] \| Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Minimum \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Commitment fee percentage	0.175%
Minimum \| Revolving Credit Facility [Member] \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.125%
Minimum \| Revolving Credit Facility [Member] \| Eurodollar
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
Maximum \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Commitment fee percentage	0.30%
Maximum \| Revolving Credit Facility [Member] \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Maximum \| Revolving Credit Facility [Member] \| Eurodollar
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit, Noncurrent		$ 0	$ 185,000,000
Current borrowing capacity					$ 250,000,000.0	$ 450,000,000.0