INVESTMENT SECURITIES (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 investments	Dec. 31, 2010 investments
Schedule of Investments [Line Items]
Investment securities, aggregate fair value, continuous unrealized losses of more than 12 months	$ 1,411,000	$ 569,000
Number of investments in continuous unrealized loss position for more than twelve months	18	19
Investment securities, aggregate unrealized loss, continuous unrealized losses of more than 12 months	69,000	46,000
Unrealized Losses Related To Marketability Of Securities Or Issuers Ability To Honor Redemption Obligations	0	0
Investment value deemed to be OTTI	0	0
Investment securities, aggregate carrying value, pledged as collateral	$ 2,588,704,000	$ 2,096,850,000