INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income taxes	$ 20,257	$ (28,045)	$ 54,264	$ 19,902
Pre-tax income	80,296	$ (88,526)	$ 199,236	$ 98,615
Effective income tax rate (as a percent)			27.20%	20.20%
Unrecognized tax benefits	16,447		$ 16,447
Unrecognized tax benefits that, if recognized, would be reflected as a component of income tax expense	10,860		10,860
Reasonably possible reduction in prior years' unrecognized tax benefits during the next twelve months	$ 2,059		$ 2,059