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Stock Options and Other Equity-Based Incentive Instruments (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Stock Option Activity | Stock option activity is summarized in the following table for the dates indicated:
| Number of Shares |  | Option Price per Share |  | Weighted Average Exercise Price
Outstanding at January 1, 2022 | 78,825 |  |  | $15.34 to $23.21 |  | $ | 19.28 |
Options granted | — |  |  | — |  |  | — |
Options exercised | (63,325) |  |  | $15.34 to $19.46 |  | $ | 18.79 |
Options forfeited | — |  |  | — |  |  | — |
Outstanding at December 31, 2022 | 15,500 |  |  | $19.46 to $23.21 |  | $ | 21.27 |
Options granted | — |  |  | — |  |  | — |
Options exercised | (8,000) |  |  | $19.46 |  | $ | 19.46 |
Options forfeited | — |  |  | — |  |  | — |
Outstanding at December 31, 2023 | 7,500 |  |  | $23.21 |  | $ | 23.21 |
Summary of Options Outstanding | The following table shows the number, weighted-average exercise price, intrinsic value, and weighted average remaining contractual life of options exercisable, options not yet exercisable and total options outstanding as of December 31, 2023:
| Currently Exercisable |  | Currently Not Exercisable |  | Total Outstanding
Number of options | 7,500 |  |  | — |  |  | 7,500 |
Weighted average exercise price | $ | 23.21 |  |  | $ | — |  |  | $ | 23.21 |
Intrinsic value (in thousands) | $ | 148 |  |  | $ | — |  |  | $ | 148 |
Weighted average remaining contractual term (yrs.) | 0.8 |  | n/a |  | 0.8
Information about Options | The following table shows the total intrinsic value of options exercised, the total fair value of options vested, total compensation costs for options recognized in income, total tax benefit and excess tax benefits recognized in income related to compensation costs for options during the periods indicated:
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Intrinsic value of options exercised | $ | 134,000 |  |  | $ | 1,190,000 |  |  | $ | 1,476,000 |
Fair value of options that vested | — |  |  | — |  |  | — |
Total compensation costs for options recognized in expense | — |  |  | — |  |  | — |
Total tax benefit recognized in income related to compensation costs for options | 40,000 |  |  | — |  |  | — |
Excess tax benefit recognized in income | — |  |  | — |  |  | — |
Restricted Stock Unit (RSU) Activity | Restricted stock unit activity is summarized in the following table for the dates indicated:
| Service Condition Vesting RSUs |  | Market Plus Service Condition Vesting RSUs
| Number of RSUs |  | Weighted Average Fair Value on Date of Grant |  | Number of RSUs |  | Weighted Average Fair Value on Date of Grant
Outstanding at January 1, 2023 | 139,194 |  |  |  |  | 114,481 |  |  |
RSUs granted | 84,066 |  |  | $ | 34.52 |  |  | 55,908 |  |  | $ | 27.72 |
Additional market plus service condition RSUs vested | — |  |  |  |  | 10,301 |  |  |
RSUs added through dividend credits | 4,706 |  |  |  |  | — |  |  |
RSUs released through vesting | (81,902) |  |  |  |  | (55,928) |  |  |
RSUs forfeited/expired | (1,577) |  |  |  |  | (1,660) |  |  |
Outstanding at December 31, 2023 | 144,487 |  |  |  |  | 123,102 |  |  |
Schedule of Weighted Average Fair Value and Assumptions | The Company uses a Monte Carlo simulation model to determine the grant-date fair value of awards with market plus service conditions (PSU). The weighted average fair value and assumptions used to value the PSU awards granted with market-based performance conditions are as follows:
| December 31,
| 2023 |  | 2022
Performance share fair value | $ | 27.73 |  |  | $ | 40.89 |
Risk-free interest rate | 4.16 | % |  | 4.10 | %
Expected volatility | 33.86 | % |  | 39.01 | %
Expected life (years) | 3 |  | 3
Expected dividend yield | 3.22 | % |  | 2.32 | %
Summary of Compensation Costs and Excess Tax Benefits for RSUs | The following table shows the compensation costs and excess tax benefits for RSUs recognized in income for the periods indicated:
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Total compensation costs recognized in income |  |  |  |  |
Service condition vesting RSUs | $ | 2,807,000 |  |  | $ | 2,883,000 |  |  | $ | 1,728,000 |
Market plus service condition vesting RSUs | 1,319,000 |  |  | 986,000 |  |  | 910,000 |
Excess tax benefit recognized in income |  |  |  |  |
Service condition vesting RSUs | $ | 924,000 |  |  | $ | 1,079,000 |  |  | $ | 626,000 |
Market plus service condition vesting RSUs | 594,000 |  |  | 355,000 |  |  | 226,000 |

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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 for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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