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Schedule of Accounts Receivable (Detail) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Receivables [Abstract]    
Billed and billable $ 121,418 $ 192,055
Less: allowance for credit losses (2,773) (2,775)
Accounts receivable, net $ 118,645 $ 189,280