INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income taxes (Note 15)	$ 14,797	$ 19,340	$ 41,834	$ 58,832
Pre-tax income	73,303	$ 91,797	$ 182,908	$ 288,199
Effective income tax rate (as a percent)			22.90%	20.40%
Unrecognized tax benefits	20,481		$ 20,481
Unrecognized tax benefits that, if recognized, would be reflected as a component of income tax expense	17,043		17,043
Reasonably possible reduction in prior years' unrecognized tax benefits during the next twelve months	$ 865		$ 865