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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2014
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, 2014 and December 31, 2013:

 
Shares
 
Weighted-Average
Grant Date Price
per Share
Outstanding Restricted Stock as of December 31, 2012
319,988

 
$
74.22

Grants issued
32,000

 
85.63

Grants vested
(39,749
)
 
80.77

Grants forfeited
(140
)
 
77.81

Outstanding Restricted Stock as of December 31, 2013
312,099

 
$
74.17

Grants issued
60,613

 
124.05

Grants vested
(28,731
)
 
63.47

Grants forfeited
(8,213
)
 
77.23

Outstanding Restricted Stock as of December 31, 2014
335,768

 
$
79.79
Expense recognition of deferred compensation
Compensation expense recognition of deferred compensation over the remaining vesting periods, adjusted for estimated forfeitures, is as follows:
 
2015
 
2016
 
2017
 
2018
 
2019
 
Total
$
5,723,105


$
2,708,516


$
2,180,245


$
1,436,301


$
517,966

 
$
12,566,133
Schedule of Grants Issued and Grant Date Fair Value
The following table represents stock grant transactions during the years ended December 31, 2014, 2013, and 2012:
 
Shares Issued
 
Grant Date Value
December 31, 2014
33,745

 
$
3,984,816

December 31, 2013
59,006

 
4,606,008

December 31, 2012
71,949

 
5,540,792
Summary of company expenses attributable to the 401(k) Plan
The following table summarizes the Company’s expenses attributable to the plan during the years ended December 31, 2014, 2013 and 2012:
 
For the year ended December 31,
2014
 
2013
 
2012
$
1,356,035

 
$
1,158,354

 
$
1,057,056