SHAREHOLDERS' EQUITY (Details 2) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		5 Months Ended
	Jan. 15, 2016	Aug. 20, 2015	Aug. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Jan. 15, 2016
August 17, 2015 ASR agreement [Member]
Treasury Shares [Line Items]
Total shares (in shares)	1,358,380.00	4,149,378	4,149,378			5,507,758
Total cost			$ 300,000
Average price per share (in usd per share)						$ 54.47
Common Stock [Member]
Treasury Shares [Line Items]
Total shares (in shares)				2,229,000	3,910,000
Total cost				$ 151,242	$ 196,011
Average price per share (in usd per share)				$ 67.86	$ 50.13
Common Stock [Member] | In the Open Market [Member]
Treasury Shares [Line Items]
Total shares (in shares)				1,896,000	3,704,000
Total cost				$ 127,982	$ 185,000
Average price per share (in usd per share)				$ 67.52	$ 49.94
Common Stock [Member] | In the Open Market [Member] | August 17, 2015 ASR agreement [Member]
Treasury Shares [Line Items]
Total shares (in shares)				1,358,380
Common Stock [Member] | From Employees [Member]
Treasury Shares [Line Items]
Total shares (in shares)				333,000	206,000
Total cost				$ 23,260	$ 11,011
Average price per share (in usd per share)				$ 69.80	$ 53.45