FAIR VALUE MEASUREMENTS (Changes in Carrying Value of Business Acquisition Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurement, beginning balance	$ 70,525	$ 37,270
Contingent cash payments	(2,412)	(1,492)
Contingent RSU grants	(196)	(163)
Changes in fair value of business acquisition liabilities	(263)	258
Contractual payable reclassification	382	148
Fair value measurement, ending balance	68,036	$ 36,021
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurement, beginning balance	70,525
Fair value measurement, ending balance	$ 68,036