CURRENT EXPECTED CREDIT LOSSES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Allowance for doubtful accounts rollforward
Beginning balance	$ 4,815	$ 5,181
Provision (benefit) for current expected credit losses	946	212
Write-offs	(53)	(301)
Recoveries collected (net of expenses)	9	8
Ending balance	$ 5,717	$ 5,100