Accounts Receivable and Allowance for Expected Credit Losses (Tables)

3 Months Ended

Mar. 31, 2022

Allowance for Doubtful Accounts and Unbilled Services [Abstract]

Schedule of Accounts Receivable

The following table summarizes the components of "Accounts receivable, net" as presented on the Condensed Consolidated Balance Sheets:

	March 31, 2022		December 31, 2021
Accounts receivable:
Billed receivables	$	565,136	$	542,056
Unbilled receivables	298,505		248,681
Allowance for expected credit losses	(39,709)		(36,617)
Accounts receivable, net	$	823,932	$	754,120

Schedule of Accounts Receivable, Writeoff

The following table summarizes the total provision for expected credit losses and write-offs:

	Three Months Ended March 31,
	2022		2021
Provision for expected credit losses (1)	$	4,859	$	4,832
Write-offs	$	2,791	$	6,916

(1)    Adjustments to the allowance for expected credit losses are recorded to selling, general & administrative ("SG&A") expenses on the Condensed Consolidated Statements of Comprehensive Income.