SHARE-BASED COMPENSATION SHARE-BASED COMP - SARs by Range of Excercise Price (Details) (Stock Appreciation Rights (SARs) [Member], Third Amended 2003 Plan [Member], USD $)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding, Number	1,663,340	1,783,956	1,493,131
Weighted Average Exercise Price - Outstanding	$ 20.63	$ 20.50	$ 19.18
Options, Exercisable, Number	1,278,950	900,965
Exercisable, Weighted Average Exercise Price	$ 19.71	$ 20.53
Excercise Price Range - 12.55 - 17.50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding, Number	568,685
Weighted Average Exercise Price - Outstanding	$ 12.55
Options, Exercisable, Number	568,685
Exercisable, Weighted Average Exercise Price	$ 12.55
Excercise Price Range - 17.51 - 25.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding, Number	745,401
Weighted Average Exercise Price - Outstanding	$ 23.17
Options, Exercisable, Number	365,287
Exercisable, Weighted Average Exercise Price	$ 22.68
Excercise Price Range - 25.01 - 28.48 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding, Number	349,254
Weighted Average Exercise Price - Outstanding	$ 28.35
Options, Exercisable, Number	344,978
Exercisable, Weighted Average Exercise Price	$ 28.36