SHAREHOLDERS' EQUITY - Cash Dividend Declared (Details) - $ / shares				3 Months Ended		9 Months Ended
	Sep. 05, 2019	May 09, 2019	Feb. 15, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Equity [Abstract]
Dividend per share (in usd per share)	$ 0.45	$ 0.45	$ 0.45	$ 0.45	$ 0.40	$ 1.35	$ 1.20