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Employee Incentive, Deferred Compensation, And Retirement Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Share Based Compensation Allocation And Classification In Financial Statements [Abstract] |
Unvested Stock Award Activity |
|  |  |  |  |  | Weighted-average grant date fair value |
Unvested December 31, 2019 |  |  | 20,203 |  |  | $ | 31.89 |
Granted |  |  | 3,683 |  |  |  | 34.67 |
Vested |  |  | (5,464 | ) |  |  | 27.69 |
Cancelled |  |  | (493 | ) |  |  | 36.33 |
Unvested December 31, 2020 |  |  | 17,929 |  |  | $ | 33.61 |

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- Definition Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares. + 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 (c) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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