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STOCK-BASED COMPENSATION (Equity Plans) (Details) - shares
Jan. 11, 2012
May. 31, 2006
Dec. 31, 2015
2015 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for issuance     6,657,370
2012 Directors Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for issuance     554,070
Number of shares authorized for issuance 600,000    
Expiration period 10 years    
2012 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares subject to outstanding awards that expire ot terminate that are available for issuance     6,277,028
Expiration period 10 years    
2006 Plan | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares subject to outstanding awards that expire ot terminate that are available for issuance     1,039,861
Expiration period   10 years