INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax benefit	$ 1,753	$ 4,388	$ 5,738	$ 30,248
Unrecognized tax benefits including interest	1,700		1,700		$ 1,500
Decrease in unrecognized tax benefit, reasonably possible within twelve months	1,600		1,600		$ 1,500
Gross deferred tax asset	$ 85,100		$ 85,100