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Stock-Based Compensation (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 $ / shares shares | Jun. 25, 2023 $ / shares shares | Dec. 31, 2023
Second Amended and Restated 2004 Stock Incentive Plan |  |  |
Stock-based compensation |  |  |
Vesting period | 3 years |  |
Second Amended and Restated 2004 Stock Incentive Plan | Deferred shares |  |  |
Stock-based compensation |  |  |
Granted (in shares) | 44,459 | 42,491 |
Second Amended and Restated 2004 Stock Incentive Plan | Performance stock units |  |  |
Stock-based compensation |  |  |
Vesting period | 3 years |  |
Period of time used to calculate the compound annual growth rate | 3 years |  |
Granted (in shares) | 39,085 | 36,076 |
Second Amended and Restated 2004 Stock Incentive Plan | Performance stock units | Minimum |  |  |
Stock-based compensation |  |  |
Percent of target shares a recipient may earn | 0 |  |
Second Amended and Restated 2004 Stock Incentive Plan | Performance stock units | Maximum |  |  |
Stock-based compensation |  |  |
Percent of target shares a recipient may earn | 2 |  |
Management Stock Purchase Plan | Maximum |  |  |
Stock-based compensation |  |  |
Percentage of annual incentive bonus that may be used to purchase RSU's | 50.00% |  |
Management Stock Purchase Plan | Class A |  |  |
Stock-based compensation |  |  |
Purchase price as percentage of fair market value of common stock on grant date | 80.00% |  |
Management Stock Purchase Plan | Restricted stock units (RSUs) |  |  |
Stock-based compensation |  |  |
Minimum deferral period | 3 years |  |
Granted (in shares) | 20,076 | 26,645 |
Fair value assumptions |  |  |
Expected life (years) | 3 years |  | 3 years
Expected stock price volatility (as a percent) | 28.90% |  | 33.70%
Expected dividend yield (as a percent) | 0.80% |  | 0.80%
Risk-free interest rate (as a percent) | 4.50% |  | 4.10%
Weighted average grant-date fair value (in dollars per share) | $ / shares | $ 68.94 | $ 57.50 |
Management Stock Purchase Plan | Restricted stock units (RSUs) | Minimum |  |  |
Stock-based compensation |  |  |
Vesting period | 3 years |  |

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