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STOCKHOLDERS' EQUITY (Details 5) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Statement    
Balance at beginning of period $ (33,940) $ (12,414)
Period Change 18,017 16,844
Balance at end of period (15,923) 4,430
Unrealized gain (loss) on investment securities available-for-sale
   
Statement    
Balance at beginning of period (34,848) (13,927)
Period Change 18,013 17,509
Balance at end of period (16,835) 3,582
Foreign exchange translation adjustment
   
Statement    
Balance at beginning of period 908 1,513
Period Change 4 (665)
Balance at end of period $ 912 $ 848