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Commitments And Contingencies (Operating Lease Rental Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Operating Leases, Rent Expense, Net [Abstract]    
Minimum rentals $ 20,786 $ 22,456
Contingent rentals, net 2,260 2,129
Less: Sublease rentals (37) (61)
Total rent expense 23,009 24,524
Common area maintenance, parking and storage. 2,600 2,500
Selling, General and Administrative Expenses [Member]    
Operating Leases, Rent Expense, Net [Abstract]    
Total rent expense 20,090 21,722
Cost of Goods Sold [Member]    
Operating Leases, Rent Expense, Net [Abstract]    
Total rent expense $ 2,919 $ 2,802