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Property and Equipment (Schedule of Property and Equipment) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 16,821 $ 17,771
Less accumulated depreciation and amortization (10,173) (9,152)
Property and equipment 6,648 8,619
Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 3,807 3,499
Furniture and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 3,146 2,498
Transportation Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 898 773
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 3,551 4,756
Computer Software [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 5,419 $ 6,245