Accounts Receivable

9 Months Ended

Sep. 30, 2020

Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]

Accounts Receivable

Accounts Receivable

Net accounts receivable consisted of the following as of September 30, 2020 and December 31, 2019 (in thousands):

	September 30, 2020		December 31, 2019
Trade accounts receivable	$	471,057	$	396,204
Unbilled accounts receivable	163,045		157,619
Gross accounts receivable	634,102		553,823
Allowances for current expected credit losses and other reserves	(3,696)		(1,880)
Accounts receivable, net	$	630,406	$	551,943

The following table summarizes the activity of the Company's allowance for current expected credit losses and other reserves during the nine months ended September 30, 2020 (in thousands):

Balance as of January 1, 2020	$	1,880
Charges to income from operations	10,354
Collections from customers previously reserved and other	(8,538)
Balance as of September 30, 2020	$	3,696

The allowance for current expected credit losses has been developed using historical loss rates for the previous twelve months as well as expectations about the future where the Company has been able to develop forecasts to support its estimates.