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Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 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 years ended December 31, 2018 and 2017:
| Shares |  | Weighted-Average Grant Date Price per Share
Outstanding Restricted Stock as of December 31, 2016 | 223,800 |  |  | $ | 132.96 |
Grants issued | 41,350 |  |  | 204.46 |
Grants vested | (65,500 | ) |  | 98.81 |
Grants forfeited | (1,750 | ) |  | 100.73 |
Outstanding Restricted Stock as of December 31, 2017 | 197,900 |  |  | $ | 165.60 |
Grants issued | 70,025 |  |  | 195.00 |
Grants vested | (32,450 | ) |  | 82.30 |
Grants forfeited | (20,900 | ) |  | 196.97 |
Outstanding Restricted Stock as of December 31, 2018 | 214,575 |  |  | $ | 177.22 |
Expense recognition of deferred compensation | The recognition of compensation expense related to deferred compensation over the remaining vesting periods is as follows:
2019 |  | 2020 |  | 2021 |  | 2022 |  | 2023 |  | Thereafter |  | Total
$ | 7,135,131 |  |  | $ | 5,671,192 |  |  | $ | 4,358,633 |  |  | $ | 3,371,500 |  |  | $ | 1,129,611 |  |  | $ | 341,987 |  |  | $ | 22,008,054 |
Schedule of Grants Issued and Grant Date Fair Value | The following table represents shares issued as part of our incentive compensation program during the years ended December 31, 2018, 2017, and 2016:
| Shares Issued |  | Grant Date Value
December 31, 2018 | 20,153 |  |  | $ | 4,109,197 |
December 31, 2017 | 19,219 |  |  | 3,892,424 |
December 31, 2016 | 21,940 |  |  | 3,879,431 |
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, 2018, 2017 and 2016:
| Shares Issued |  | Company Contribution
December 31, 2018 | 11,967 |  |  | $ | 2,231,735 |
December 31, 2017 | 8,478 |  |  | 1,710,785 |
December 31, 2016 | 9,466 |  |  | 1,738,287 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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