SHAREHOLDERS' EQUITY (Details 3) - USD ($) $ / shares in Units, $ in Thousands					1 Months Ended	5 Months Ended	6 Months Ended
	Apr. 17, 2017	Jan. 15, 2016	Dec. 31, 2015	Aug. 20, 2015	Aug. 30, 2015	Jan. 15, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Aug. 17, 2015
Class of Stock [Line Items]
Preferred shares							$ 775,000		$ 1,126,074
Treasury shares, at cost [Member]
Class of Stock [Line Items]
Total cost							282,313	$ 323,050
Additional paid-in capital [Member]
Class of Stock [Line Items]
Total cost							$ 0	$ (60,000)
August 17, 2015 ASR agreement [Member]
Class of Stock [Line Items]
Accelerated share repurchases, authorized amount										$ 300,000
Total cost					$ 300,000
Total shares (in shares)		1,358,380.00		4,149,378	4,149,378	5,507,758
Accelerated Share Repurchases, initial repurchase percentage					80.00%
Average price per share (in usd per share)						$ 54.47
August 17, 2015 ASR agreement [Member] | Treasury shares, at cost [Member]
Class of Stock [Line Items]
Total cost		$ 60,000	$ 240,000
August 17, 2015 ASR agreement [Member] | Additional paid-in capital [Member]
Class of Stock [Line Items]
Total cost			$ 60,000
Series C Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)	14,042,955
Preferred stock, dividend rate, percentage	6.875%
Preferred shares	$ 351,000