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Earnings per common share - Computations of Basic Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Income available to common shareholders: |  |  |  |
Net income | $ 716,000 | $ 655,000 | $ 1,300,000 | $ 1,186,000
Less: Preferred stock dividends | (35,000) | (27,000) | (71,000) | (52,000)
Net income available to common equity | 681,000 | 628,000 | 1,229,000 | 1,134,000
Less: Income attributable to unvested stock-based compensation awards | (2,000) | (2,000) | (3,000) | (3,000)
Net income available to common shareholders | $ 679,000 | $ 626,000 | $ 1,226,000 | $ 1,131,000
Weighted-average shares outstanding: |  |  |  |
Common shares outstanding (including common stock issuable) and unvested stock-based compensation awards (in shares) | 159,559 | 167,282 | 162,025 | 167,010
Less: Unvested stock-based compensation awards (in shares) | (338) | (331) | (324) | (305)
Weighted-average shares outstanding (in shares) | 159,221 | 166,951 | 161,701 | 166,705
Basic earnings per common share (in USD per share) | $ 4.26 | $ 3.75 | $ 7.58 | $ 6.79

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