EQUITY (Shares Purchased and Retired) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended			12 Months Ended
	Apr. 30, 2018	Mar. 31, 2019	Mar. 31, 2018	[1]	Dec. 31, 2018
EQUITY [Abstract]
Shares Purchased and Retired, Number	20	0	492		1,192
Shares Purchased and Retired, Total purchase price	$ 2,250	$ 0	$ 57,824		$ 133,983
Shares Purchased and Retired, Average price per share		$ 0.00	$ 117.47		$ 112.41

[1] Settlement of 20 thousand shares at a total price of $2,250 thousand occurred after March 31, 2018.