Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS") - Additional Information (Detail) - $ / shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Earnings per share [abstract] | ||||
| Average market value of common shares | $ 179.85 | $ 116.72 | $ 185.2 | $ 106.13 |