STOCKHOLDERS' EQUITY Common Stock Repurchases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Stockholders' Equity Attributable to Parent [Abstract]
Repurchase of common stock	$ 7,302
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 43,900		$ 51,200
Stock Repurchased During Period, Shares	121,000	498,000