DERIVATIVE FINANCIAL INSTRUMENTS AND BALANCE SHEET OFFSETTING (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
Fair Values of Derivative Instruments
Notional amount	$ 55,000,000
Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	105,000,000		50,000,000
Derivative liabilities	8,312,000	[1]	1,521,000	[1]
Designated as Hedging Instrument | Interest rate swaps
Fair Values of Derivative Instruments
Notional amount	105,000,000		50,000,000
Derivative liabilities	8,312,000	[1]	1,521,000	[1]
Not Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	1,873,694,000		1,388,866,000
Derivative assets	35,954,000	[1]	42,850,000	[1]
Derivative liabilities	30,240,000	[1]	40,539,000	[1]
Not Designated as Hedging Instrument | Foreign exchange options
Fair Values of Derivative Instruments
Notional amount	85,614,000		85,614,000
Derivative assets	5,955,000	[1]	5,011,000	[1]
Derivative liabilities	3,511,000	[1]	3,052,000	[1]
Not Designated as Hedging Instrument | Interest rate swaps
Fair Values of Derivative Instruments
Notional amount	1,496,204,000		1,190,793,000
Derivative assets	25,931,000	[1]	36,943,000	[1]
Derivative liabilities	24,675,000	[1]	36,799,000	[1]
Notional amount of derivative assets	1,500,000,000		1,190,000,000
Notional amount of derivative liabilities	1,570,000,000		1,190,000,000
Not Designated as Hedging Instrument | Short-term Foreign Exchange
Fair Values of Derivative Instruments
Notional amount	291,876,000		112,459,000
Derivative assets	4,068,000	[1]	896,000	[1]
Derivative liabilities	2,054,000	[1]	688,000	[1]
Gross aggregate value of assets and liabilities	$ 1,600,000		$ 495,000

[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.