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Property And Equipment (Schedule Of Property And Equipment, Net) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 168,080 $ 156,992
Less: Accumulated depreciation and amortization (80,822) (70,997)
Total property and equipment, net 87,258 85,995
Land [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 903 903
Building [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 11,032 11,007
Machinery And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 108,633 105,383
Capitalized Software [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 8,895 7,391
Office Furniture And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 5,094 4,714
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 23,007 17,867
Useful Life (in years) Life of lease  
Rental Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 152 149
Useful Life (in years) 5 years  
Construction In Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 10,364 $ 9,578
Minimum [Member] | Building [Member]    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 25 years  
Minimum [Member] | Machinery And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 2 years  
Minimum [Member] | Capitalized Software [Member]    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 3 years  
Minimum [Member] | Office Furniture And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 1 year  
Maximum [Member] | Building [Member]    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 30 years  
Maximum [Member] | Machinery And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 7 years  
Maximum [Member] | Capitalized Software [Member]    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 5 years  
Maximum [Member] | Office Furniture And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 5 years