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Introduction and Basis of Presentation (Tables)
 9 Months Ended
Sep. 25, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Company and franchise unit activity
The following table shows the unit activity for the quarter and three quarters ended September 25, 2013 and September 26, 2012, respectively:

 
Quarter Ended
 
Three Quarters Ended
 
September 25, 2013
 
September 26, 2012
 
September 25, 2013
 
September 26, 2012
Company restaurants, beginning of period
165

 
177

 
164

 
206

Units opened
—

 
—

 
—

 
—

Units acquired from franchisees
1

 
—

 
2

 
—

Units sold to franchisees
(2
)
 
(5
)
 
(2
)
 
(28
)
Units closed
—

 
(1
)
 
—

 
(7
)
End of period
164

 
171

 
164

 
171

 
 
 
 
 
 
 
 
Franchised and licensed restaurants, beginning of period
1,525

 
1,507

 
1,524

 
1,479

Units opened
9

 
12

 
27

 
27

Units purchased from Company
2

 
5

 
2

 
28

Units acquired by Company
(1
)
 
—

 
(2
)
 
—

Units closed
(13
)
 
(8
)
 
(29
)
 
(18
)
End of period
1,522

 
1,516

 
1,522

 
1,516

Total restaurants, end of period
1,686

 
1,687

 
1,686

 
1,687