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Equity Incentive Plan (Tables) (Restricted share awards)
 9 Months Ended
Sep. 30, 2013
Restricted share awards
  
Equity Incentive Plan  
Summary of the non-vested shares
A summary of the non-vested shares as of September 30, 2013 is as follows:
 
2013
 
Number of
Shares
 
Weighted Average
Grant Date Fair
Value
Unvested at January 1,
1,013,673

 
$
17.80

Granted (1)
382,032

 
21.31

Vested (1)
(338,777
)
 
18.15

Forfeited
(4,217
)
 
19.82

Unvested at September 30,
1,052,711

 
$
18.96