DEBT (Convertible Subordinated Notes) (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Zero Coupon Convertible Subordinated Notes [Line Items]
Payments On Zero Coupon Subordinated Notes	$ 2,500,000	$ 149,100,000
Stock Issued During Period, Shares, Conversion of Convertible Securities	0
Zero-coupon convertible subordinated notes [Member]
Zero Coupon Convertible Subordinated Notes [Line Items]
Principal Amount At Maturity Of Zero Coupon Subordinated Notes Converted	3,000,000
Value Of Cash And Common Stock In Connection With Conversions Of Zero Coupon Subordinated Notes Settled In Current Period	3,600,000
Payments On Zero Coupon Subordinated Notes	2,500,000
Stock Issued During Period, Shares, Conversion of Convertible Securities	12,533
Minimum contingent cash interest rate on zero-coupon subordinated notes (in hundredths)	0.125%
Number of trading days used to establish contingent cash interest rate on zero-coupon subordinated notes (in days)	5
Stock conversion rate for zero-coupon subordinated notes (per thousand)	13.4108
Principal amount of zero-coupon subordinated notes	$ 1,000
Date of the terms for the zero-coupon subordinated notes and indenture	Oct. 24, 2006