ACCOUNTS RECEIVABLE (SCHEDULE OF CHANGE IN ALLOWANCE) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS [Abstract]
Balance, beginning balance	$ 5,067	$ 5,452	$ 5,592
Provision for credit losses	(350)	494	1,711
Uncollectible receivables written-off	(281)	(880)	(1,311)
Effect of foreign currency	(15)	1	(540)
Acquisition credit losses	988
Balance, ending balance	$ 5,409	$ 5,067	$ 5,452