Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details 3)

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Stock-Based Compensation (Details 3) (Restricted Stock [Member], USD $)
3 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Restricted Stock [Member]
   
Summary of unvested restricted stock awards activity    
Number of Shares, Balance Beginning 206,800 73,820
Number of Shares, Granted 559,551 155,383
Number of Shares, Vested   (21,235)
Number of Shares, Expired/cancelled   (1,064)
Number of Shares, Forfeited (381) (104)
Number of Shares, Balance, Ending 765,970 206,800
Weighted-Average Grant Date Fair Value per share, Balance Beginning $ 12.36 $ 12.26
Weighted-Average Grant Date Fair Value per share, Granted $ 12.51 $ 12.44
Weighted-Average Grant Date Fair Value Per Share, Vested   $ 12.55
Weighted-Average Grant Date Fair Value Per Share, Expired/cancelled   $ 12.45
Weighted-Average Grant Date Fair Value per share, Forfeited $ 12.49 $ 12.55
Weighted-Average Grant Date Fair value per share, Balance Ending $ 12.47 $ 12.36