INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income taxes	$ 14,449	$ 23,558	$ 34,007	$ 47,947
Pre-tax income	45,758	$ 94,434	$ 118,940	$ 187,141
Effective income tax rate (as a percent)			28.60%	25.60%
Unrecognized tax benefits	14,496		$ 14,496
Unrecognized tax benefits that, if recognized, would be reflected as a component of income tax expense	8,880		8,880
Reasonably possible reduction in prior years' unrecognized tax benefits during the next twelve months	$ 2,384		$ 2,384