INVESTMENTS IN DEBT AND EQUITY SECURITIES (Gross Realized Gains and Losses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Gross realized gains on sales of available-for-sale securities	$ 1,675	$ 5,286	$ 8,350
Gross realized losses on sales of available-for-sale securities	(374)	(1)	(31)
Other-than-temporary impairment	(2)	(3)	(4)
Gross realized gains on calls of investment securities	7	53	0
Net realized gain on investment securities	$ 1,306	$ 5,335	$ 8,315