Restaurant Impairments, Closure Costs and Asset Disposals (Narrative) (Details) $ in Thousands	12 Months Ended
Jan. 03, 2017 USD ($) restaurant	Dec. 29, 2015 USD ($) restaurant	Dec. 30, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Closed restaurants that operated below acceptable profitability levels \| restaurant		16
Closure costs \| $	$ 2,251	$ 3,076	$ 91
Present value non-cancelable lease payment discount rate	4.45%
Number of restaurants impaired \| restaurant	54	39
Accrued Expenses and Other Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, current portion \| $	$ 900	$ 2,400

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 4

Name:	us-gaap_RestructuringReserveCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant