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Acquisition Of Businesses (Schedule Of Non-Significant Acquisitions) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]      
Goodwill $ 12,250 $ 14,895  
Franchised Restaurants [Member]      
Business Acquisition [Line Items]      
Property and equipment 936 583 $ 2,186
Identifiable intangible assets 853 518 6,628
Goodwill 1,621 2,029 0
Assumed debt (206) 0 (317)
Gain on bargain purchase of franchised restaurants 0 (71) (3,827)
Purchase price 3,204 3,059 4,670
Restaurants sold in exchange 0 0 (635)
Settlement of franchise receivables (2,113) (1,436) 0
Seller financing 0 (798) (3,711)
Purchase price paid at acquisition date $ 1,091 $ 825 $ 324