INCOME TAXES - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 19,249	$ 17,757	$ 18,296
Foreign	3,399	1,609	4,060
State	3,590	818	3,880
Deemed Repatriation	0	0	(970)
Deferred:
Federal	(3,017)	(3,707)	(3,788)
Foreign	167	67	(69)
State	(1,594)	263	(952)
Total income tax provision	$ 21,794	$ 16,807	$ 20,457