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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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CONSOLIDATED BALANCE SHEETS |  |
Available-for-sale investment securities, amortized cost | $ 3,673,396 | $ 8,560,733
Held-to-maturity investment securities, fair value | $ 3,960,713 | $ 0
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, authorized (in shares) | 300,000,000 | 300,000,000
Common stock, issued (in shares) | 140,958,520 | 140,581,715
Common stock outstanding (in shares) | 127,357,680 | 127,502,472
Treasury stock (in shares) | 13,600,840 | 13,079,243

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