EQUITY AND EARNINGS PER SHARE - Summary of Outstanding Options - Options Assigned (Details)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Unexercised Inception to Date (in shares) | shares	12,380,107
2004 - 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Unexercised Inception to Date (in shares) | shares	88,280
2004 - 2007 [Member] | Lower Range [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date of Grant	2004
Range of Strike Prices (in dollars per share) | $ / shares	$ 29.92
2004 - 2007 [Member] | Upper Range [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date of Grant	2007
Range of Strike Prices (in dollars per share) | $ / shares	$ 33.80
2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date of Grant	2013
Total Unexercised Inception to Date (in shares) | shares	1,100,498
2013 [Member] | Lower Range [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Strike Prices (in dollars per share) | $ / shares	$ 10.24
2013 [Member] | Upper Range [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Strike Prices (in dollars per share) | $ / shares	$ 11.48
2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date of Grant	2014
Range of Strike Prices (in dollars per share) | $ / shares	$ 12.20
Total Unexercised Inception to Date (in shares) | shares	258,750
Options Granted [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Unexercised Inception to Date (in shares) | shares	1,447,528