Debt (Details Textual) (USD $)	9 Months Ended		12 Months Ended						0 Months Ended		0 Months Ended
	Sep. 30, 2014	Sep. 24, 2013	Dec. 31, 2013	Jul. 14, 2014 restaurant	Sep. 30, 2014 Revolving Facility ($110 million)		Dec. 31, 2013 Revolving Facility ($110 million)		Jun. 19, 2014 Term Loan Debt	Jun. 18, 2014 Term Loan Debt	Jun. 19, 2014 Line of Credit
Debt (Textual) [Abstract]
Borrowing capacity available under our revolving line of credit	$ 110,000,000		$ 110,000,000		$ 91,800,000		$ 84,700,000
Outstanding letters of credit					18,200,000		18,300,000
Long-term Debt	595,421,000		565,125,000			[1]	7,000,000	[1]
Issuance of debt	40,000,000	0							40,000,000
Borrowing capacity										125,000,000.0
Remaining borrowing capacity									85,000,000
Debt Issuance Cost											$ 700,000
Number Of Restaurants Acquired				56
Credit Agreement Period			95 days

[1] The Company had $91.8 million of borrowing capacity available under its revolving credit facility (“Revolving Facility”), net of $18.2 million of outstanding letters of credit at September 30, 2014. At December 31, 2013, the Company had $84.7 million of borrowing capacity available under its Revolving Facility, net of $18.3 million of outstanding letters of credit and borrowings of $7.0 million.