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Compensation Plans (Tables)
9 Months Ended
Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Roll-Forward of Outstanding Restricted Stock Grants Issued
The following table represents a roll-forward of outstanding Restricted Stock and related activity during the nine months ended September 30, 2018:
 
Shares
 
Weighted-Average
Grant Date Price
per Share
Outstanding Restricted Stock as of December 31, 2017
197,900

 
$
165.60

Grants issued
60,950

 
201.78

Grants vested
(27,450
)
 
77.81

Grants forfeited
(20,900
)
 
196.97

Total Outstanding Restricted Stock as of September 30, 2018
210,500

 
$
176.75

Expense Recognition of Deferred Compensation
The recognition of compensation expense related to deferred compensation over the remaining vesting periods is as follows:
Three Months 
 Remaining In
 
 
 
 
 
 
 
 
 
 
 
 
2018
 
2019
 
2020
 
2021
 
2022
 
Thereafter
 
Total
$
1,850,410

 
$
6,863,879

 
$
5,399,940

 
$
4,087,381

 
$
3,100,248

 
$
1,200,348

 
$
22,502,206

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value
The following table represents common shares issued as part of our incentive compensation program during the nine months ended September 30, 2018 and 2017:
 
Shares Issued
 
Grant Date Value
September 30, 2018
20,153

 
$
4,109,197

September 30, 2017
19,219

 
3,892,424