Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 24, 2018	Dec. 31, 2017	Jun. 25, 2017
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (2,086)	$ (1,827)	$ (1,416)
Total other intangible assets, gross carrying amount	39,077	39,891	39,069
Total other intangibe assets, net carrying value	36,991	38,064	37,653
License / Franchise Agreements [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Carrying Amount	3,357	3,360	3,308
Accumulated Amortization	(2,086)	(1,827)	(1,416)
Net Carrying Value	1,271	1,533	1,892
Trade Names [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Carrying Amount/Value	$ 35,720	$ 36,531	$ 35,761