Annual report pursuant to Section 13 and 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
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross $ 105,769 $ 89,796
Less: Accumulated depreciation and amortization (73,282) (61,822)
Property, equipment and software, net 32,487 27,974
Leasehold Improvements
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross 11,859 9,924
Data processing and communications equipment
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross 43,562 38,926
Furniture, Fixtures, and Other Equipment
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross 11,638 9,680
Software
   
Property, Plant and Equipment [Line Items]    
Property, equipment and software, gross $ 38,710 $ 31,266