Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Summary of Nonvested Stock Activity) (Details)

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STOCK-BASED COMPENSATION (Summary of Nonvested Stock Activity) (Details) (Restricted Stock [Member], USD $)
3 Months Ended
Mar. 31, 2014
Restricted Stock [Member]
 
Summary of nonvested stock activity  
Number of Shares, beginning balance 260,763
Weighted Average Grant-Date Fair Value, beginning balance $ 16.47
Number of Shares, Granted 122,606
Weighted Average Grant-Date Fair Value, Granted $ 24.86
Number of Shares, Net settle for taxes (61,732)
Weighted Average Grant-Date Fair Value, Net settle for taxes $ 24.83
Number of Shares, Vested (13,310)
Weighted Average Grant-Date Fair Value, Vested $ 11.79
Number of Shares, Forfeited (1,765)
Weighted Average Grant-Date Fair Value, Forfeited $ 18.53
Number of Shares, ending balance 306,562
Weighted Average Grant-Date Fair Value, ending balance $ 21.89