ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of the period	$ 1,429	$ 2,021	$ 1,402	$ 1,466
Charges to earnings	629	69	1,145	949
Write-off of uncollectible accounts receivable	(585)	(337)	(1,079)	(669)
Recoveries collected	0	3	5	10
Balance, end of the period	$ 1,473	$ 1,756	$ 1,473	$ 1,756