Accounts Receivable

3 Months Ended

Mar. 31, 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 March 31, 2020 and December 31, 2019 (in thousands):

	March 31, 2020		December 31, 2019
Trade accounts receivable	$	440,302	$	396,204
Unbilled accounts receivable	176,688		157,619
Gross accounts receivable	616,990		553,823
Allowances for current expected credit losses and other reserves	(3,181)		(1,880)
Accounts receivable, net	$	613,809	$	551,943

The following table summarizes the activity of the Company's allowance for current expected credit losses and other reserves during the three months ended March 31, 2020 (in thousands):

Balance as of January 1, 2020	$	1,880
Charges to income from operations	1,752
Collections from customers previously reserved and other	(451)
Balance at March 31, 2020	$	3,181

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.