CONTRACT BALANCES (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Schedule of Allowance for Doubtful Accounts Receivable

The allowance for doubtful accounts as of March 31, 2018, and changes in the allowance for doubtful accounts during the three months ended March 31, 2018, were as follows (in thousands):

	Three Months Ended March 31, 2018
Balance, beginning of period	$	8,602
Add: bad debt expense	7,636
Less: write-offs, net of recoveries	(6,103		)
Balance, end of period	$	10,135

Contract with Customer, Liability

Changes in deferred revenue during the three months ended March 31, 2018 were as follows (in thousands):

	Three Months Ended March 31, 2018
Balance, beginning of period	$	3,469
Less: Recognition of deferred revenue from beginning balance	(2,179		)
Add: Net increase in current period contract liabilities	2,184
Balance, end of period	$	3,474