DERIVATIVE FINANCIAL INSTRUMENTS, Narrative (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2011
Derivative [Line Items]
Termination value of derivatives in a net liability position	$ 14,500,000	$ 14,500,000
Receive-fixed, Pay-variable Interest Rate Swaps [Member]
Derivative [Line Items]
Number of instruments entered into during period	2	2
Notional amount	50,000,000	50,000,000
Net loss recognized in interest expense related to hedge ineffectiveness	344,000	427,000
Net reduction to interest expense related to net settlements of derivatives	819,000	1,300,000
Certificates of Deposit [Member]
Derivative [Line Items]
Number of instruments entered into during period	2	2
Notional amount	50,000,000	50,000,000
Equity Swap Agreements [Member]
Derivative [Line Items]
Number of instruments entered into during period	2	2
Term of contract (in years)	5Y	5Y
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Term of contract (in years)	5Y	5Y
Short-term Foreign Exchange [Member]
Derivative [Line Items]
Notional amount	$ 524,000,000	$ 524,000,000