CURRENT EXPECTED CREDIT LOSSES (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Allowance for doubtful accounts rollforward
Beginning balance	$ 4,815	$ 5,181
Provision (benefit) for current expected credit losses	2,113	(828)
Write-offs	(530)	(302)
Recoveries collected (net of expenses)	7
Ending balance	$ 6,405	$ 4,051