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Employee Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Employee Benefit Plans [Abstract] |  |  |
Total number of shares held by ESOP (in shares) | 298,294 | 365,274 |
Number of ESOP shares allocated (in shares) | 298,294 | 365,274 |
ESOP Trust [Abstract] |  |  |
Number of shares issued (in shares) | 0 | 8,333 | 7,294
Fair value of stock contributed | $ 0 | $ 328 | $ 295
Cash contributed | 614 | 500 | 500
Total expense | 614 | 828 | 795
Cash surrender value of life insurance contracts | 33,829 |  |
Cash surrender value of annuity assets | 2,170 |  |
Expected payments of covered individuals | 8,377 | 7,815 |
Deferred Profit Sharing [Member] |  |  |
Employee Benefit Plans [Abstract] |  |  |
Contributions charged to expense | 242 | 264 | 352
Supplemental Employee Retirement Plan [Member] |  |  |
ESOP Trust [Abstract] |  |  |
Expenses related to plan | 743 | 627 | $ 602
Postretirement Benefit [Member] |  |  |
ESOP Trust [Abstract] |  |  |
Total postretirement benefit | $ 3,721 | $ 3,130 |

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- Definition The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
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