INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income taxes	$ 19,558	$ 24,389
Pre-tax income	$ 73,182	$ 92,707
Effective income tax rate (as a percent)	26.70%	26.30%
Unrecognized tax benefits	$ 14,526
Unrecognized tax benefits that, if recognized, would be reflected as a component of income tax expense	8,369
Reasonably possible reduction in prior years' unrecognized tax benefits during the next twelve months	$ 2,236