Quarterly report pursuant to Section 13 or 15(d)

Property, Equipment and Software - Components of Property, Equipment and Software (Details)

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Property, Equipment and Software - Components of Property, Equipment and Software (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross $ 134,690 $ 114,491
Less: Accumulated depreciation and amortization (68,175) (59,716)
Property, equipment and software, net 66,515 54,775
Leasehold Improvements
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross 20,700 18,756
Data Processing and Communications Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross 53,356 47,719
Furniture, Fixtures, and Other Equipment
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross 15,578 11,266
Software
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross $ 45,056 $ 36,750