CONTRACT BALANCES (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Schedule of Allowance for Doubtful Accounts Receivable

The allowance for doubtful accounts as of September 30, 2018, and changes in the allowance for doubtful accounts during the nine months ended September 30, 2018, were as follows (in thousands):

	Nine Months Ended September 30, 2018
Balance, beginning of period	$	8,602
Add: bad debt expense	19,285
Less: write-offs, net of recoveries	(19,002		)
Balance, end of period	$	8,885

Contract with Customer, Liability

Changes in deferred revenue during the nine months ended September 30, 2018 were as follows (in thousands):

	Nine Months Ended September 30, 2018
Balance, beginning of period	$	3,469
Less: Recognition of deferred revenue from beginning balance	(3,132		)
Add: Net increase in current period contract liabilities	3,055
Balance, end of period	$	3,392