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Equity Incentive Plan (Tables)
12 Months Ended
Dec. 31, 2013
Equity Incentive Plan [Abstract]  
Schedule of non-vested shares and weighted average grant date fair value
 
 
Number of shares
 
 
Weighted Average Grant Date Fair Value
 
 
 
 
 
 
Unvested as at January 1, 2011
 
3,082
 
 
$39.90
Granted
 
49,867
 
 
35.70
Vested
 
(24,949
 
35.10
Unvested as at December 31, 2011
 
28,000
 
 
36.75
 
 
 
 
 
 
 
 
 
 
 
 
Unvested as at January 1, 2012
 
28,000
 
 
36.75
Granted
 
90,667
 
 
13.50
Vested
 
(100,000
 
15.67
Unvested as at December 31, 2012
 
18,667
 
 
36.75
 
 
 
 
 
 
 
 
 
 
 
 
Unvested as at January 1, 2013
 
18,667
 
 
36.75
Granted
 
279,333
 
 
6.43
Vested
 
(21,333
 
19.71
Unvested as at December 31, 2013
 
276,667
 
 
7.46