STOCK-BASED COMPENSATION, Equity Instruments Other Than Options (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		24,000
Restricted Stock and Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	160,425
Fair value of shares granted	$ 6,400,000
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	685
Compensation expense	31,000	22,000
Shares withheld for tax withholding obligations (in shares)	89,862
Fair value of shares withheld for tax withholding obligations	$ 3,500,000