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Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [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 year ended December 31, 2020:
SharesWeighted-Average
Grant Date Price
per Share
Outstanding Restricted Stock as of December 31, 2019227,844 $175.49 
Grants issued22,099 115.32 
Grants vested(50,600)160.79 
Grants forfeited(15,625)185.90 
Outstanding Restricted Stock as of December 31, 2020183,718 $173.80 
Expense recognition of deferred compensation The recognition of compensation expense related to deferred compensation over the remaining vesting periods is as follows:
20212022202320242025ThereafterTotal
$5,332,145 $4,375,573 $2,406,727 $1,308,272 $535,508 $789,893 $14,748,118 
Schedule of Grants Issued and Grant Date Fair Value
The following table represents shares issued as part of the Company’s incentive compensation program during the years ended December 31, 2020, 2019, and 2018:
Shares IssuedGrant Date Value
December 31, 202023,640 $3,396,359 
December 31, 201924,048 3,655,296 
December 31, 201820,153 $4,109,197 
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, 2020, 2019 and 2018:
Shares IssuedCompany Contribution
December 31, 202020,976 $2,511,746 
December 31, 201917,651 2,496,936 
December 31, 201811,967 $2,231,735