INCOME TAXES - Reconciliation of Unrecognized Tax Benefits, excluding Interest and Penalties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits
Unrecognized tax benefits, beginning of period	$ 36,216	$ 33,938	$ 31,515
Additions based on tax positions related to the current year	3,530	3,172	2,212
Additions for tax positions of prior years	1,919	1,568	2,148
Reductions for tax positions of prior years	(2,431)	(124)	0
Lapse in statute of limitations	(1,932)	(2,276)	(1,703)
Settlements	0	(62)	(234)
Unrecognized tax benefits, end of the period	$ 37,302	$ 36,216	$ 33,938