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Employee Benefit Plans (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2022
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,
| 2022 | 2021
Restricted Awards | Average Market Price at Grant | Restricted Awards | Average Market Price at Grant
Outstanding at January 1 | 146,755 |  | $ | 72.16 |  | 158,554 |  | $ | 67.40 |
Granted | 19,034 |  | 75.69 |  | 20,536 |  | 70.66 |
Vested | (25,330) |  | 78.77 |  | (36,685) |  | 66.32 |
Outstanding at March 31 | 140,459 |  | $ | 71.75 |  | 142,405 |  | $ | 67.88 |
Information regarding stock-based compensation associated with restricted shares is provided in the following table (in thousands):
|  | Three months ended March 31,
|  |  | 2022 | 2021
Stock-based compensation expense associated with restricted shares |  |  | $ | 662 |  | $ | 783 |
At period-end: |  |  | March 31, 2022 |
Unrecognized stock-based compensation expense associated with restricted shares |  |  | $ | 5,280 |  |
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,
|  | 2022 | 2021
Components of net periodic cost: |  |  |  |
Interest cost |  |  | $ | 90 |  | $ | 83 |
Expected return on plan assets |  |  | (221) |  | (205) |
Net amortization and deferral |  |  | 195 |  | 280 |
Net Periodic Pension Cost |  |  | $ | 64 |  | $ | 158 |

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