STOCKHOLDERS' EQUITY (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Statement
Balance at beginning of period	$ (33,940)	$ (12,414)
Period Change	17,062	2,259
Balance at end of period	(16,878)	(10,155)
Unrealized gain (loss) on investment securities available-for-sale
Statement
Balance at beginning of period	(34,848)	(13,927)
Period Change	17,052	2,991
Balance at end of period	(17,796)	(10,936)
Foreign exchange translation adjustment
Statement
Balance at beginning of period	908	1,513
Period Change	10	(732)
Balance at end of period	$ 918	$ 781