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Incentive and Restricted Stock Plan and Dividend Reinvestment Plan (Tables)
12 Months Ended
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Nonstatutory Stock Options Activity
The following table summarizes activity for nonstatutory stock options for the years ended December 31:
 
2014
 
2013
 
2012
 
Number
of Shares

Weighted
Average
Exercise
Price

Weighted
Average
Remaining
Contractual
Term
 
Number of
Shares

Weighted
Average
Exercise
Price

Weighted
Average
Remaining
Contractual
Term
 
Number of
Shares

Weighted
Average
Exercise
Price

Weighted
Average
Remaining
Contractual
Term
Outstanding at beginning of year
428,900

$
37.36

 
 
675,500

$
35.18

 
 
757,050

$
34.33

 
Granted


 
 


 
 


 
Exercised


 
 


 
 


 
Forfeited
(273,400
)
37.08

 
 
(246,600
)
31.39

 
 
(81,550
)
27.29

 
Outstanding at End of Year
155,500

$
37.86

1.0 year
 
428,900

$
37.36

1.4 years
 
675,500

$
35.18

2.0 years
Exercisable at End of Year
155,500

$
37.86

1.0 year
 
428,900

$
37.36

1.4 years
 
675,500

$
35.18

2.0 years
2003 Stock Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Non-Vested Restricted Stock
The following table provides information about restricted stock granted under the 2003 Stock Plan for the years ended December 31:
 
Restricted
Stock

 
Weighted Average
Grant Date
Fair Value

Non-vested at December 31, 2012
115,019

 
$
22.39

Granted
22,189

 
19.18

Vested
45,864

 
19.68

Forfeited
11,929

 
21.30

Non-vested at December 31, 2013
79,415

 
$
21.50

Granted

 

Vested
41,740

 
20.70

Forfeited
14,530

 
20.97

Non-vested at December 31, 2014
23,145

 
$
23.28

2014 Stock Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Non-Vested Restricted Stock
The following table provides information about restricted stock granted under the 2014 Stock Plan for the years ended December 31:
 
Restricted
Stock

 
Weighted Average
Grant Date
Fair Value

Non-vested at December 31, 2013

 
$

Granted
80,455

 
23.24

Vested
158

 
23.19

Forfeited
473

 
23.19

Non-vested at December 31, 2014
79,824

 
$
23.24