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v3.23.3

Share-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 USD ($) d $ / shares shares | Sep. 30, 2022 $ / shares shares | Dec. 31, 2022 shares
Restricted Stock And Restricted Stock Unit (RSU) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) | 296,705 | 152,982 |
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 |  |
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 |  |
Market-based Restricted Stock Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) | 167,606 | 100,193 |
Trading days | d | 20 |  |
Trading days, lookback | d | 30 |  |
Weighted-average grant-date fair values of restricted stock awards granted (in usd per share) | $ / shares | $ 70.07 | $ 87.11 |
Weighted-average period to recognize compensation cost (in years) | 2 years 1 month 6 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 | $ | $ 53.2 |  |
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number | 818,106 |  | 464,354
Granted (in shares) | 464,311 |  |
Weighted-average period to recognize compensation cost (in years) | 2 years 6 months |  |
ESPP |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Maximum issuance of common stock (in shares) | 2,000,000,000,000 |  |
Market value of common stock (as a percent) | 85.00% |  |
Number of shares available for issuance (in shares) | 1,068,601 |  |
Maximum earnings withheld by the employees (as a percent) | 15.00% |  |
Estimated forfeiture rate | 12.70% | 11.20% |
Issuance of shares under employee stock purchase plan (in shares) | 87,098 | 76,741 |
Minimum | 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 |  |
Minimum | Market-based Restricted Stock Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted-average grant-date fair values of restricted stock awards granted (in usd per share) | $ / shares | $ 83.61 | $ 107.97 |
Maximum | Restricted Stock And Restricted Stock Unit (RSU) | Senior Staff |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting periods | 5 years |  |
Maximum | Market-based Restricted Stock Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted-average grant-date fair values of restricted stock awards granted (in usd per share) | $ / shares | $ 103.76 | 138.73 |
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 options outstanding (in shares) | 435,135 |  |
Number of shares available for issuance (in shares) | 1,069,488 |  |
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% |  |
Employee Stock Purchase Plan | ESPP |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Per share price of shares purchased (in dollars per share) | $ / shares | $ 54.25 | $ 68.22 |

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