DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	$ 50,000		$ 200,000
Derivative assets			998	[1]
Derivative liabilities	1,521	[1]	639	[1]
Designated as Hedging Instrument | Interest rate swaps
Fair Values of Derivative Instruments
Notional amount	50,000		200,000
Derivative assets			998	[1]
Derivative liabilities	1,521	[1]	639	[1]
Not Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	1,388,866		803,814
Derivative assets	42,850	[1]	24,980	[1]
Derivative liabilities	40,539	[1]	23,525	[1]
Not Designated as Hedging Instrument | Equity swap agreements
Fair Values of Derivative Instruments
Notional amount			22,709
Derivative assets			202	[1]
Derivative liabilities			204	[1]
Not Designated as Hedging Instrument | Foreign exchange options
Fair Values of Derivative Instruments
Notional amount	85,614		85,614
Derivative assets	5,011	[1]	3,899	[1]
Derivative liabilities	3,052	[1]	2,430	[1]
Not Designated as Hedging Instrument | Interest rate swaps
Fair Values of Derivative Instruments
Notional amount	1,190,793		485,196
Derivative assets	36,943	[1]	19,476	[1]
Derivative liabilities	36,799	[1]	19,924	[1]
Not Designated as Hedging Instrument | Short-term Foreign Exchange
Fair Values of Derivative Instruments
Notional amount	112,459		210,295
Derivative assets	896	[1]	1,403	[1]
Derivative liabilities	$ 688	[1]	$ 967	[1]

[1] Derivative assets, which are a component of other assets, include the estimated settlement of the derivative asset position. Derivative liabilities, which are a component of other liabilities and deposits, include the estimated settlement of the derivative liability position.