INVESTMENT SECURITIES (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 investments	Dec. 31, 2011 investments
Schedule of Investments [Line Items]
Investment securities, aggregate fair value, continuous unrealized losses of more than 12 months	$ 9,450	$ 1,411
Number of investments in continuous unrealized loss position for more than twelve months	23	18
Investment securities, aggregate unrealized loss, continuous unrealized losses of more than 12 months	154	69
Unrealized losses related to marketability of securities or issuers ability to honor redemption obligations	0	0
Other than temporary impairment on securities	0	0
Investment securities, aggregate carrying value, pledged as collateral	$ 2,351,072	$ 2,588,704