STOCK-BASED COMPENSATION (Details) (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Performance Shares Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized	$ 2,900,000	$ 0
Related liability	2,900,000
RSA, PSU, and RSU [Roll Forward]
Balance, January 1, 2013 (in shares)	627
Granted (in shares)	170
Vested and Paid (in shares)	0
Forfeited (in shares)	0
Balance, March 31, 2013 (in shares)	797
Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized	3,000,000	1,000,000
Related liability	$ 10,200,000		$ 7,200,000
RSA, PSU, and RSU [Roll Forward]
Balance, January 1, 2013 (in shares)	604
Granted (in shares)	92
Vested and Paid (in shares)	0
Forfeited (in shares)	(1)
Balance, March 31, 2013 (in shares)	695