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Furniture, Equipment, And Leasehold Improvements, Net (Schedule Of Furniture, Equipment, And Leasehold Improvements) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Furniture, Equipment, and Leasehold Improvements, Gross $ 6,919 $ 7,169
Accumulated depreciation (6,353) (6,019)
Furniture, equipment, and leasehold improvements, net 566 1,150
Furniture and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Furniture, Equipment, and Leasehold Improvements, Gross 2,758 2,816
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Furniture, Equipment, and Leasehold Improvements, Gross $ 4,161 $ 4,353
Minimum [Member] | Furniture and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 3 years  
Minimum [Member] | Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 5 years  
Maximum [Member] | Furniture and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 5 years  
Maximum [Member] | Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 10 years