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INVESTMENTS (Details 2) (USD $)
12 Months Ended 3 Months Ended
Dec. 31, 2013
Mar. 31, 2014
Auction rate securities
Mar. 31, 2013
Auction rate securities
INVESTMENTS      
Realized gains on the sale of available-for-sale investments $ 2,500,000    
Net gain recognized through earnings on trading securities      
Gain on trading securities sold   131,000  
(Loss) gain on trading securities held   (64,000) 6,000
Gain on trading securities   $ 67,000 $ 6,000