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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract] |
Stock-based Compensation Expense | Stock-based compensation expense and related tax benefits recognized under the 2006 Plan for the years ended December 31, was as follows (in thousands):
| 2023 |  | 2022 |  | 2021
Stock-settled bonus awards | $ | 1,166 |  |  | $ | 1,186 |  |  | $ | 820 |
Time-vested stock awards | 2,639 |  |  | 2,089 |  |  | 2,273 |
Performance share awards | 3,807 |  |  | 1,067 |  |  | 784 |
Total | $ | 7,612 |  |  | $ | 4,342 |  |  | $ | 3,877 |
Tax benefit recognized from stock-based compensation | $ | 1,899 |  |  | $ | 1,083 |  |  | $ | 967 |
Schedule of Other Restricted Stock Awards | Time-vested stock award activity for the year ended December 31, 2023 was:
|  | Number of Shares |  | Weighted Average Grant Date Fair Value
Unvested as of December 31, 2022 |  | 63,925 |  | $ | 43.01 |
Granted |  | 60,295 |  |  | $ | 45.78 |
Vested |  | (25,684) |  |  | $ | 43.13 |
Forfeited |  | (693) |  | $ | 43.30 |
Unvested as of December 31, 2023 |  | 97,843 |  | $ | 44.68 |
Performance Shares Activity | Performance Share award activity for the year ended December 31, 2023 was:
|  | Number of Shares |  | Weighted Average Grant Date Fair Value
Unvested as of December 31, 2022 |  | 72,161 |  | $ | 42.88 |
Granted |  | 121,844 |  |  | $ | 42.23 |
Vested |  | (25,723) |  |  | $ | 42.83 |
Forfeited |  | — |  | $ | — |
Unvested as of December 31, 2023 |  | 168,282 |  | $ | 42.41 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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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 -Name Accounting Standards Codification -Section 50 -Subparagraph (c) -Paragraph 2 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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