INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income tax benefit	$ 5,689	$ 29,721	$ 13,441	$ 53,182
Effective tax rates (as a percent)	(78.00%)	(196.50%)		(193.20%)
Federal statutory income tax rate (as a percentage)			21.00%
Income tax expense - excluding excess tax benefit on stock compensation	$ 2,034	$ 3,946	$ 284	$ 7,688
Excess tax benefits on stock compensation	$ 7,723	$ 33,667	$ 13,725	$ 60,870