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Share-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 USD ($) d $ / shares shares | Mar. 31, 2023 $ / shares shares | Dec. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of options outstanding (in shares) | 435,135 |  |
Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted stock units outstanding (in shares) | 726,367 |  | 506,425
Granted (in shares) | 347,275 |  |
Weighted-average period to recognize compensation cost (in years) | 2 years 7 months 6 days |  |
Restricted Stock And Restricted Stock Unit (RSU) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) | 347,275 | 271,614 |
Restricted Stock And Restricted Stock Unit (RSU) | Board of Directors |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting periods | 1 year |  |
Market-based Restricted Stock Awards (PSAs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) |  | 167,606 |
Trading days | d | 20 |  |
Trading days, lookback | d | 30 |  |
Weighted-average period to recognize compensation cost (in years) | 1 year 9 months 18 days |  |
Restricted Stock, Restricted Stock Unit (RSU), Market-based Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized compensation cost related to non-vested awards granted | $ | $ 84.1 |  |
Restricted Stock Awards (RSAs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted-average period to recognize compensation cost (in years) | 1 year 9 months 18 days |  |
Market-based Restricted Stock Units (PSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted stock units outstanding (in shares) | 573,727 |  | 270,772
Granted (in shares) | 308,970 |  |
Weighted-average grant-date fair values of restricted stock awards granted (in dollars per share) | $ / shares | $ 87.17 | $ 70.07 |
Weighted-average period to recognize compensation cost (in years) | 2 years 7 months 6 days |  |
Minimum | Restricted Stock And Restricted Stock Unit (RSU) | Senior Staff |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting periods | 3 years |  |
Minimum | Restricted Stock And Restricted Stock Unit (RSU) | Chief Executive Officer |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting periods | 3 years |  |
Minimum | Market-based Restricted Stock Awards (PSAs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted-average grant-date fair values of restricted stock awards granted (in dollars per share) | $ / shares | $ 83.61 |  |
Minimum | Market-based Restricted Stock Units (PSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage | 0.00% |  |
Maximum | Restricted Stock And Restricted Stock Unit (RSU) | Senior Staff |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting periods | 4 years |  |
Maximum | Restricted Stock And Restricted Stock Unit (RSU) | Chief Executive Officer |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting periods | 8 years |  |
Maximum | Market-based Restricted Stock Awards (PSAs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted-average grant-date fair values of restricted stock awards granted (in dollars per share) | $ / shares | $ 103.76 |  |
Maximum | Market-based Restricted Stock Units (PSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage | 200.00% |  |
2015 Stock Option Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Maximum issuance of common stock (in shares) | 4,200,000 |  |
Number of shares available for issuance (in shares) | 126,565 |  |
2015 Stock Option Plan | Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted stock units outstanding (in shares) | 726,367 |  |
2015 Stock Option Plan | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Market value of common stock (as a percent) | 100.00% |  |

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