INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income tax benefit	$ 29,721	$ 104	$ 53,182	$ 1,183
Effective tax rates (as a percent)	(196.50%)	(1.30%)	(193.20%)	(8.10%)
Federal statutory income tax rate (as a percentage)			21.00%	35.00%
Income tax expense - excluding excess tax benefit on stock compensation	$ 3,946	$ 3,736	$ 7,688	$ 6,420
Excess tax benefits recognized in income tax expense	$ 33,667	$ 3,840	$ 60,870	$ 7,603