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SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Restricted Stock awards (Details) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Equity And Share-Based Compensation    
Number of restricted shares outstanding 272,326 26,224
Restricted shares granted 251,938  
Number of restricted shares issued during the period (2,836)  
Number of Restricted Shares Forfeited (3,000)  
weighted average price per share of restricted shares granted $ 19.25