Quarterly report pursuant to Section 13 or 15(d)

Employee Benefits and Share Option Plans - Summary of Restricted Share Activity (Details 1)

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Employee Benefits and Share Option Plans - Summary of Restricted Share Activity (Details 1) - Restricted Stock
9 Months Ended
Sep. 30, 2015
$ / shares
shares
Time-Based Awards  
Number of Restricted Share Awards  
Non-vested as of January 1, 2015 | shares 196,644
Granted | shares 5,165
Vested | shares (81,581)
Forfeited or Expired | shares (74,980)
Non-vested and expected to vest as of September 30, 2015 | shares 45,248
Weighted-Average Grant-Date Fair Value  
Non-vested as of January 1, 2015 $ 3.43
Granted 47.56
Vested 5.74
Forfeited or Expired 2.67
Non-vested and expected to vest as of September 30, 2015 $ 5.57
Performance-Based Awards  
Number of Restricted Share Awards  
Non-vested as of January 1, 2015 | shares 1,208,608
Granted | shares
Vested | shares (620,739)
Forfeited or Expired | shares (587,869)
Non-vested and expected to vest as of September 30, 2015 | shares
Weighted-Average Grant-Date Fair Value  
Non-vested as of January 1, 2015 $ 3.37
Granted
Vested $ 3.92
Forfeited or Expired $ 2.79
Non-vested and expected to vest as of September 30, 2015