FINANCIAL INSTRUMENTS (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Derivative [Line Items]
Derivative, Fair Value, Net	$ 64,836,000	$ 55,052,000
Accumulated net loss from designated or qualifying cash flow hedges	7,200,000	7,700,000
Net amount of deferred gains and losses on cash flow hedges that is expected to be reclassified within the next 12 months	1,300,000
Notional amount of foreign currency forward contracts	17,200,000
Fair Value Hedging [Member]
Derivative [Line Items]
Fair Value hedges - fixed-to-variable interest rate swaps	550,000,000
Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative asset designated as hedging instrument fair value	65,200,000	56,500,000
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Other assets [Member]
Derivative [Line Items]
Total Net Derivatives Asset	65,218,000	56,520,000
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Other current assets [Member]
Derivative [Line Items]
Total Net Derivatives Asset	77,000	180,000
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Other current liabilities [Member]
Derivative [Line Items]
Total Net Derivatives Liabilities	$ 459,000	$ 1,648,000
Minimum [Member] | Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Description of Variable Rate Basis	six-month LIBOR
Variable interest rate	0.54%
Maximum [Member] | Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Description of Variable Rate Basis	one-month LIBOR
Variable interest rate	1.33%