STOCK COMPENSATION PLANS (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended	84 Months Ended		12 Months Ended	60 Months Ended	12 Months Ended		60 Months Ended	12 Months Ended		48 Months Ended	12 Months Ended		36 Months Ended	12 Months Ended		24 Months Ended	12 Months Ended		60 Months Ended	84 Months Ended	12 Months Ended		84 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Time-based restricted stock	Dec. 31, 2012 Time-based restricted stock	Dec. 31, 2012 Time-based restricted stock 2008	Dec. 31, 2008 Time-based restricted stock 2008	Dec. 31, 2012 Time-based restricted stock 2008	Dec. 31, 2012 Time-based restricted stock 2009	Dec. 31, 2009 Time-based restricted stock 2009	Dec. 31, 2012 Time-based restricted stock 2009	Dec. 31, 2012 Time-based restricted stock 2010	Dec. 31, 2010 Time-based restricted stock 2010	Dec. 31, 2012 Time-based restricted stock 2010	Dec. 31, 2012 Time-based restricted stock 2011	Dec. 31, 2011 Time-based restricted stock 2011	Dec. 31, 2012 Time-based restricted stock 2011	Dec. 31, 2012 Time-based restricted stock 2012	Dec. 31, 2012 Performance-based restricted stock	Dec. 31, 2012 Performance-based restricted stock	Dec. 31, 2012 Performance-based restricted stock	Dec. 31, 2012 Performance-based restricted stock 2006	Dec. 31, 2006 Performance-based restricted stock 2006	Dec. 31, 2012 Performance-based restricted stock 2006	Dec. 31, 2012 Performance-based restricted stock 2007	Dec. 31, 2007 Performance-based restricted stock 2007	Dec. 31, 2012 Performance-based restricted stock 2008	Dec. 31, 2008 Performance-based restricted stock 2008	Dec. 31, 2012 Performance-based restricted stock 2011	Dec. 31, 2011 Performance-based restricted stock 2011
Stock Compensation Plans
Total Unrecognized Compensation Expense				$ 10,700	$ 10,700														$ 33,797	$ 33,797	$ 33,797	$ 14,924		$ 14,924	$ 11,259		$ 453		$ 7,161
Granted (in shares)		2,537,892		1,647,892			577,730			57,812			443,050			342,900		226,400	890,000				315,000			205,000		20,000		350,000
Vested (in shares)		713,307		713,307				516,639			55,646			141,022
Forfeited (in shares)		126,304			86,304			33,404						22,200			28,450	2,250			40,000			40,000
Outstanding awards (in shares)	1,698,281	1,698,281	1,698,281	848,281	848,281	27,687		27,687	2,166		2,166	279,828		279,828	314,450		314,450	224,150	850,000	850,000	850,000	275,000		275,000	205,000		20,000		350,000
Granted (in dollars per share)							$ 29.52			$ 15.88			$ 19.99			$ 20.54		$ 23.77					$ 54.27			$ 54.92		$ 22.66		$ 20.46
Shares issued by the Company upon vesting (in dollars per share)								$ 29.12			$ 15.82			$ 19.88
Forfeited (in dollars per share)								$ 31.42						$ 22.03			$ 21.76	$ 22.23		$ 54.21
Outstanding awards (in dollars per share)						$ 34.57		$ 34.57	$ 17.37		$ 17.37	$ 19.88		$ 19.88	$ 20.43		$ 20.43	$ 23.79				$ 54.27		$ 54.27	$ 54.92		$ 22.66		$ 20.46
Outstanding, Weighted Average Fair Value	$ 42,066	$ 42,066		$ 21,012	$ 21,012	$ 686		$ 686	$ 54		$ 54	$ 6,931		$ 6,931	$ 7,789		$ 7,789	$ 5,552	$ 21,054	$ 21,054	$ 21,054	$ 6,812		$ 6,812	$ 5,078		$ 495		$ 8,669
Outstanding, Weighted Average Remaining Contractual Life	1 year 10 months 24 days			1 year 3 months 18 days		1 month 6 days			6 months			8 months 12 days			1 year 3 months 18 days			2 years 3 months 18 days	2 years 4 months 24 days			3 months 18 days			4 years 1 month 6 days		3 months 18 days		3 years 2 months 12 days
Closing stock price (in dollars per share)	$ 24.77	$ 24.77