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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2016
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 years ended December 31, 2016 and 2015:
 
Shares
 
Weighted-Average
Grant Date Price
per Share
Outstanding Restricted Stock as of December 31, 2014
335,768

 
$
79.79

Grants issued
82,050

 
169.50

Grants vested
(84,962
)
 
73.47

Grants forfeited
(3,500
)
 
77.81

Outstanding Restricted Stock as of December 31, 2015
329,356

 
$
108.46

Grants issued
38,900

 
183.14

Grants vested
(127,386
)
 
83.50

Grants forfeited
(17,070
)
 
143.69

Outstanding Restricted Stock as of December 31, 2016
223,800

 
$
132.96
Expense recognition of deferred compensation
The recognition of compensation expense related to deferred compensation over the remaining vesting periods, adjusted for estimated forfeitures, is as follows:
2017
 
2018
 
2019
 
2020
 
2021
 
Thereafter
 
Total
$
6,152,255

 
$
4,353,599

 
$
3,617,145

 
$
2,087,404

 
$
662,735

 
$
854,968

 
$
17,728,106
Schedule of Grants Issued and Grant Date Fair Value
The following table represents stock issued as part of our incentive compensation program during the years ended December 31, 2016, 2015, and 2014:
 
Shares Issued
 
Grant Date Value
December 31, 2016
21,940

 
$
3,879,431

December 31, 2015
27,192

 
3,826,458

December 31, 2014
33,745

 
3,984,816
Summary of company expenses attributable to the 401(k) Plan
The following table summarizes the Company’s expenses attributable to the 401(k) plan during the years ended December 31, 2016, 2015 and 2014:
For the year ended December 31,
2016
 
2015
 
2014
$
1,738,287

 
$
1,645,434

 
$
1,356,035