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Employee Benefit Plans (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Restricted Shares Activity And Related Information | A summary of the Company’s restricted shares activity and related information is presented below:
| Three months ended March 31,
| 2021 | 2020
Restricted Awards | Average Market Price at Grant | Restricted Awards | Average Market Price at Grant
Outstanding at January 1 | 158,554 |  | $ | 67.40 |  | 148,083 |  | $ | 62.62 |
Granted | 20,536 |  | 70.66 |  | 23,028 |  | 70.36 |
Forfeited | — |  | 71.43 |  | — |  | — |
Vested | (36,685) |  | 66.32 |  | (24,910) |  | 50.42 |
Outstanding at March 31 | 142,405 |  | $ | 67.88 |  | 146,201 |  | $ | 65.91 |
Information regarding stock-based compensation associated with restricted shares is provided in the following table (in thousands):
|  | Three months ended March 31,
|  |  | 2021 | 2020
Stock-based compensation expense associated with restricted shares |  |  | $ | 783 |  | $ | 629 |
At period-end: |  |  | March 31, 2021 |
Unrecognized stock-based compensation expense associated with restricted shares |  |  | $ | 5,310 |  |
Weighted average period (in years) in which the above amount is expected to be recognized |  |  | 2.9 |
Pension and Other Postretirement Benefits | The following table presents the components of the Company's net periodic benefit cost, which is included in the line item "other expenses" in the consolidated statements of income, (in thousands):
|  | Three months ended March 31,
|  | 2021 | 2020
Components of net periodic cost: |  |  |  |
Interest cost |  |  | $ | 83 |  | $ | 112 |
Expected return on plan assets |  |  | (205) |  | (203) |
Net amortization and deferral |  |  | 280 |  | 272 |
Net Periodic Pension Cost |  |  | $ | 158 |  | $ | 181 |

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