INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income taxes (Note 15)	$ 6,667	$ 18,040	$ 27,037	$ 39,492
Pre-tax income	33,680	$ 103,484	$ 109,605	$ 196,402
Effective income tax rate (as a percent)			24.70%	20.10%
Unrecognized tax benefits	20,235		$ 20,235
Unrecognized tax benefits that, if recognized, would be reflected as a component of income tax expense	17,259		17,259
Reasonably possible reduction in prior years' unrecognized tax benefits during the next twelve months	$ 2,165		$ 2,165