CONTRACT BALANCES (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Allowance for Doubtful Accounts Receivable

The allowance for doubtful accounts as of March 31, 2020 and 2019 and changes in the allowance for doubtful accounts during the three months ended March 31, 2020 and 2019 were as follows (in thousands):

	Three Months Ended March 31,
	2020		2019
Balance, beginning of period	$	7,686	$	8,685
Add: provision for doubtful accounts	15,933		4,264
Less: write-offs, net of recoveries	(9,031)		(5,501)
Balance, end of period	$	14,588	$	7,448

Contract with Customer, Liability

Changes in deferred revenue during the three months ended March 31, 2020 were as follows (in thousands):

	Three Months Ended March 31, 2020
Balance, beginning of period	$	4,315
Less: recognition of deferred revenue from beginning balance	(2,974)
Add: net increase in current period contract liabilities	2,296
Balance, end of period	$	3,637