DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) (USD $)		3 Months Ended	9 Months Ended				9 Months Ended		9 Months Ended
	Dec. 31, 2011 item	Sep. 30, 2012 Receive-fixed, Pay-variable Interest Rate Swaps item	Sep. 30, 2012 Receive-fixed, Pay-variable Interest Rate Swaps item	Dec. 31, 2011 Receive-fixed, Pay-variable Interest Rate Swaps item	Sep. 30, 2012 Receive-fixed, Interest Rate Swaps	Sep. 30, 2012 Pay-variable Interest Rate Swaps	Sep. 30, 2012 Equity swap agreements	Dec. 31, 2012 Equity swap agreements item	Sep. 30, 2012 Foreign exchange options	Sep. 30, 2012 Interest rate swaps item
Derivative
Number of instruments entered into during the period		2	2	4				2
Number of hedged certificates of deposit	4
Notional amount of derivatives called by the counterparties										$ 150,000,000
Notional amount of each individual derivative entered into during the period				50,000,000	30,000,000	20,000,000
Amount of each individual certificate of deposit hedged by a derivative	50,000,000				30,000,000	20,000,000
Term of contract							5 years		5 years
Net gain (loss) recognized in interest expense related to hedge ineffectiveness		1,100,000	3,000,000
Net reduction to interest expense related to net settlements of derivatives		$ 605,000	$ 3,200,000
The number of derivatives called by the counterparties										3