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Related Party Transactions (Summary Of Related Party Transactions) (Details) - Axionlog Distribution B.V. [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Related Party Transaction [Line Items]      
Food and paper $ (164,882) $ (199,801) $ (319,456)
Occupancy and other operating expenses (2,499) (2,251) (10,327)
Other operating expenses, net 0 16,986 0
Net interest income 461 1,387 583
Logistics service fees from related party 44,170 45,143 48,340
Suppliers purchase expense related party $ 120,712 $ 154,658 $ 271,116