INCOME TAXES - Components of the Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tax provision:
Federal	$ 189,708	$ 222,685	$ 259,793
State	29,320	31,786	37,129
Foreign	32,638	29,086	33,255
Current income tax expense (benefit), total	251,666	283,557	330,177
Deferred provision (benefit):
Federal	(21,389)	13,936	(14,559)
State	(3,048)	1,986	(2,074)
Foreign	(3,659)	(913)	(462)
Deferred provision (benefit), total	(28,096)	15,009	(17,095)
Total provision	$ 223,570	$ 298,566	$ 313,082