XML 59 R45.htm IDEA: XBRL DOCUMENT v3.20.4
Schedule of Accounts Receivable (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Receivables [Abstract]    
Billed and billable $ 200,221 $ 165,153
Less: allowance for credit losses (2,760) (1,637)
Accounts receivable, net $ 197,461 $ 163,516