v2.4.0.8
Accounts Receivable (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Billed and billable $ 130,301 $ 176,511
Less: unpaid deferred revenue (63,249) (83,107)
Accounts receivable, gross 67,052 93,404
Less: allowance for doubtful accounts (4,183) (4,366)
Account receivable, net $ 62,869 $ 89,038