Quarterly report pursuant to Section 13 or 15(d)

Components of Property, Equipment and Software (Detail)

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Components of Property, Equipment and Software (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross $ 122,032 $ 105,769
Less: Accumulated depreciation and amortization (79,429) (73,282)
Property, equipment and software, net 42,603 32,487
Leasehold Improvements
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross 15,427 11,859
Data processing and communications equipment
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross 48,992 43,562
Furniture, Fixtures, and Other Equipment
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross 12,375 11,638
Software
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross $ 45,238 $ 38,710