DERIVATIVE FINANCIAL INSTRUMENTS AND BALANCE SHEET OFFSETTING (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	$ 80,000		$ 50,000
Derivative liabilities	6,831	[1]	1,521	[1]
Designated as Hedging Instrument | Interest rate swaps
Fair Values of Derivative Instruments
Notional amount	80,000		50,000
Derivative liabilities	6,831	[1]	1,521	[1]
Not Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	1,662,285		1,388,866
Derivative assets	30,709	[1]	42,850	[1]
Derivative liabilities	26,836	[1]	40,539	[1]
Not Designated as Hedging Instrument | Foreign exchange options
Fair Values of Derivative Instruments
Notional amount	85,614		85,614
Derivative assets	5,460	[1]	5,011	[1]
Derivative liabilities	3,257	[1]	3,052	[1]
Not Designated as Hedging Instrument | Interest rate swaps
Fair Values of Derivative Instruments
Notional amount	1,320,438		1,190,793
Derivative assets	22,353	[1]	36,943	[1]
Derivative liabilities	20,129	[1]	36,799	[1]
Not Designated as Hedging Instrument | Short-term Foreign Exchange
Fair Values of Derivative Instruments
Notional amount	256,233		112,459
Derivative assets	2,896	[1]	896	[1]
Derivative liabilities	3,450	[1]	688	[1]
Gross aggregate value of assets and liabilities	$ 635		$ 495

[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.