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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2022
Share-based Payment Arrangement [Abstract] |
Summary of Activity | The following table summarizes the weighted-average assumptions used to determine the awards grant date fair value:
|  | Three Months Ended March 31,
Restricted Shares and Performance Based Shares |  | 2022 |  | 2021
Expected quarterly dividends per share |  | $ | 0.3475 |  |  | $ | 0.3275 |
Risk-free interest rate |  | 1.46 | % |  | 0.32 | %
Market-Based Shares |  |  |  |
Dividend yield |  | — | % |  | 2.76 | %
Expected volatility |  | — | % |  | 33.69 | %
Risk-free interest rate |  | — | % |  | 0.29 | %
The following table summarizes activity in restricted stock awards, including performance-based and market-based shares for the three months ended March 31, 2022:
| Restricted Stock |  |
| Shares |  | Weighted- Average Grant Date Fair Value |  |  |  |
Outstanding at December 31, 2021 | 167,270 |  |  | $ | 43.71 |  |  |  |  |
Granted | 171,919 |  |  | 40.66 |  |  |  |  |
Released | (152,740) |  |  | 41.80 |  |  |  |  |
Forfeited | (682) |  |  | 40.27 |  |  |  |  |
Outstanding at March 31, 2022 | 185,767 |  |  | $ | 45.64 |  |  |  |  |
The following table provides additional information concerning restricted stock activity, including performance-based and market-based shares, and stock options:
|  | Three Months Ended March 31,
Restricted Stock |  | 2022 |  | 2021
Weighted-average grant date fair value |  | $ | 40.66 |  |  | $ | 43.68 |
Total fair value of restricted shares that vested (in thousands) |  | $ | 6,906 |  |  | $ | 8,967 |

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- Definition Tabular disclosure of share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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