Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Schedule of Property and Equipment (Detail)

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Property and Equipment - Schedule of Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Less accumulated depreciation and amortization $ (18,370) $ (17,917)
Property and equipment net 8,476 6,688
Computer software and hardware equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment 7,489 6,211
Furniture, fixtures, and equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment $ 19,357 $ 18,394