INCOME TAXES (Summary of Changes in Gross Amount of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unrecognized tax benefits
Unrealized tax benefit, beginning balance	$ 30,967	$ 31,475	$ 33,766
Additions based on tax positions related to the current year	5,446	4,795	4,627
Payments related to items settled with taxing authorities	(2,570)	0	(443)
Reduction due to lapse of statute of limitations and settlements	(6,996)	(5,303)	(6,475)
Unrealized tax benefit, ending balance	$ 26,847	$ 30,967	$ 31,475