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STOCKHOLDERS' EQUITY (Details 2) - 6 months ended Jun. 30, 2015 - Restricted Stock Units (RSUs) [Member] - $ / shares
Total
Unvested restricted stock activity  
Balance outstanding at the beginning of the period (in shares) 3,100
Forfeited (in shares) (43)
Vested (in shares) (946)
Granted (in shares) 682
Balance outstanding at the end of the period (in shares) 2,793
Weighted-Average Grant-Date Fair Value  
Balance at the beginning of the period (in dollars per share) $ 14.44
Forfeited (in dollars per share) 14.71
Vested (in dollars per share) 12.04
Granted (in dollars per share) 22.43
Balance at the end of the period (in dollars per share) $ 17.20