DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	$ 100,000		$ 200,000
Derivative assets	702	[1]	998	[1]
Derivative liabilities			639	[1]
Designated as Hedging Instrument | Interest rate swaps
Fair Values of Derivative Instruments
Notional amount	100,000		200,000
Derivative assets	702	[1]	998	[1]
Derivative liabilities			639	[1]
Not Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	941,395		803,814
Derivative assets	33,225	[1]	24,980	[1]
Derivative liabilities	31,740	[1]	23,525	[1]
Not Designated as Hedging Instrument | Equity swap agreements
Fair Values of Derivative Instruments
Notional amount	22,709		22,709
Derivative assets	204	[1]	202	[1]
Derivative liabilities	204	[1]	204	[1]
Not Designated as Hedging Instrument | Foreign exchange options
Fair Values of Derivative Instruments
Notional amount	85,614		85,614
Derivative assets	4,264	[1]	3,899	[1]
Derivative liabilities	2,610	[1]	2,430	[1]
Not Designated as Hedging Instrument | Interest rate swaps
Fair Values of Derivative Instruments
Notional amount	740,956		485,196
Derivative assets	27,880	[1]	19,476	[1]
Derivative liabilities	28,636	[1]	19,924	[1]
Not Designated as Hedging Instrument | Short-term Foreign Exchange
Fair Values of Derivative Instruments
Notional amount	92,116		210,295
Derivative assets	877	[1]	1,403	[1]
Derivative liabilities	$ 290	[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.