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
Jun. 30, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Property, equipment, and software, gross $ 368,911 $ 341,604
Less: Accumulated depreciation and amortization (199,689) (178,322)
Property, equipment, and software, net 169,222 163,282
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property, equipment, and software, gross 69,859 70,558
Data processing and communications equipment    
Property, Plant and Equipment [Line Items]    
Property, equipment, and software, gross 84,619 77,358
Furniture, fixtures, and other equipment    
Property, Plant and Equipment [Line Items]    
Property, equipment, and software, gross 38,669 35,856
Software    
Property, Plant and Equipment [Line Items]    
Property, equipment, and software, gross $ 175,764 $ 157,832