INCOME TAXES - Income Tax Expense Allocation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income from continuing operations	$ 38,859	$ 50,118	$ 23,935
Interest expense	100	0	(100)
Stockholders’ equity	0	(300)	(7,200)
Total income tax expense allocation	$ 38,900	$ 49,800	$ 16,600