Basis of Presentation - Additional Information (Details) $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 02, 2017 USD ($) shares	Jul. 02, 2017 USD ($) Restaurant shares	Jul. 03, 2016 USD ($)	Jul. 02, 2017 USD ($) shares	Jul. 03, 2016 USD ($)	Jan. 01, 2017 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of restaurants closed in 2013 | Restaurant		3
Loss from discontinued operations, net		$ (110)	$ (111)	$ (223)	$ (217)
Income (loss) from continuing operations before income taxes for restaurant closed during the period		0	(39)	35	(48)
Transaction costs			15		62
Non-controlling interests	$ 5,674	$ 5,674		$ 5,674		$ 3,740
Stock repurchase program, shares repurchased | shares	305,059
Aggregate purchase price of shares under stock repurchase program	$ 3,203
Shares repurchased during the quarter | shares		0		0
Allocation of Net Income
Summary Of Significant Accounting Policies [Line Items]
Non-controlling interests		$ 0	$ 0	$ 0	$ 0
Ninety Nine Restaurant & Pub
Summary Of Significant Accounting Policies [Line Items]
Transaction costs associated with proposed acquisition	$ 460	460		460
General and Administrative Expenses
Summary Of Significant Accounting Policies [Line Items]
Restaurant closing cost		$ 33		$ 138