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MARKETABLE SECURITIES - Net realized gains and reclassification (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
MARKETABLE SECURITIES        
Net realized (loss) gain $ (24) $ 36 $ 56 $ 148
Reclassification of net realized (loss) gains from other comprehensive income $ (24) $ 36 $ 56 $ 148