INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income tax expense	$ (4,292)	$ (6,729)	$ (3,109)	$ (15,099)
Effective tax rates (as a percent)	29.80%	48.00%	10.70%	39.40%
Federal statutory income tax rate (as a percentage)		35.00%	35.00%	35.00%
Income tax expense - excluding excess tax benefit on stock compensation	$ 5,103	$ 6,729	$ 11,523	$ 15,099
Excess tax benefits recognized in income tax expense	$ 811	$ 0	$ 8,414	$ 0