Business Combinations (Estimates of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	May 07, 2015		Sep. 27, 2016	Sep. 30, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, including assembled Workforce	$ 14,970	[1]	$ 15,076	$ 15,066
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	3,900
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	15
Weighted Average Estimated Useful Life			3 years
Franchise Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 116
Franchise Rights [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Life			9 years
Franchise Rights [Member] | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Life			3 years

[1] The excess of the purchase price over the aggregate fair value of net assets acquired was allocated to goodwill. The portion of the purchase price attributable to goodwill represents benefits expected as a result of the acquisition, including sales and unit growth opportunities.