Accounts Receivable, Net

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Accounts Receivable, Net

ACCOUNTS RECEIVABLE, NET

Accounts receivable, net balances at December 31, 2020 and 2019 were as follows (in thousands):

	2020		2019
Trade accounts receivable	$	167,575	$	176,375
Unbilled revenue, at net realizable value	63,494		60,035
Total accounts receivable	231,069		236,410
Allowance for doubtful accounts	(14,894)		(14,379)
Accounts receivable, net	$	216,175	$	222,031

Changes in the allowance for doubtful accounts on accounts receivable are as follows (in thousands):

	2020		2019		2018
Balance at beginning of period	$	(14,379)	$	(13,389)	$	(13,827)
Provision	(9,323)		(8,433)		(7,052)
Charge-offs, net of recoveries	8,808		7,443		7,490
Balance at end of period	$	(14,894)	$	(14,379)	$	(13,389)