SHAREHOLDERS' EQUITY (DETAILS 3) - USD ($) $ / shares in Units, $ in Thousands	5 Months Ended	12 Months Ended
	Jan. 15, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Treasury Stock [Member]
Class of Stock [Line Items]
Total cost		$ 571,805	$ 264,538	$ 543,202
Additional paid-in capital [Member]
Class of Stock [Line Items]
Total cost		$ (60,000)	60,000	$ 0
Accelerated Share Repurchase Agreement August 17 2015 [Member]
Class of Stock [Line Items]
Total cost			$ 300,000
Total shares (in shares)	5,507,758	1,358,380	4,149,378
Accelerated Share Repurchases, initial repurchase percentage			80.00%
Average price per share (in usd per share)	$ 54.47
Accelerated Share Repurchase Agreement August 17 2015 [Member] | Treasury Stock [Member]
Class of Stock [Line Items]
Total cost		$ 60,000	$ 240,000
Accelerated Share Repurchase Agreement August 17 2015 [Member] | Additional paid-in capital [Member]
Class of Stock [Line Items]
Total cost		$ (60,000)	$ 60,000