INCOME TAXES - Schedule of tax expense and effective tax rate for income from continuing operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
INCOME TAXES
Income from continuing operations, before income taxes	$ 24,704	$ 52,396	$ 105,797	$ 108,583
Provision for income taxes	$ 3,657	$ 6,783	$ 10,817	$ 15,293
Effective tax rate	14.80%	12.90%	10.20%	14.10%