Investment Securities (Tables)
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6 Months Ended |
Jun. 30, 2026 |
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| Investments, Debt and Equity Securities [Abstract] |
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| Schedule of investment securities available-for-sale |
The following table shows investment securities available-for-sale. | | | | | | | | | | | | | | | | | | | | | | | | | | | | (Dollars in thousands) | | Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Fair Value | | June 30, 2026 | | | | | | | | | | U.S. Treasury and Federal agencies securities | | $ | 736,718 | | | $ | 312 | | | $ | (8,428) | | | $ | 728,602 | | | U.S. States and political subdivisions securities | | 108,121 | | | 514 | | | (1,637) | | | 106,998 | | | Mortgage-backed securities — Federal agencies | | 743,150 | | | 920 | | | (52,477) | | | 691,593 | | | Corporate debt securities | | 500 | | | — | | | (4) | | | 496 | | | | | | | | | | | | Total debt securities available-for-sale | | $ | 1,588,489 | | | $ | 1,746 | | | $ | (62,546) | | | $ | 1,527,689 | | | | | | | | | | | | December 31, 2025 | | | | | | | | | | U.S. Treasury and Federal agencies securities | | $ | 697,652 | | | $ | 3,171 | | | $ | (4,046) | | | $ | 696,777 | | | U.S. States and political subdivisions securities | | 113,126 | | | 1,333 | | | (1,396) | | | 113,063 | | | Mortgage-backed securities — Federal agencies | | 757,151 | | | 3,372 | | | (48,380) | | | 712,143 | | | Corporate debt securities | | 500 | | | 3 | | | — | | | 503 | | | | | | | | | | | | Total debt securities available-for-sale | | $ | 1,568,429 | | | $ | 7,879 | | | $ | (53,822) | | | $ | 1,522,486 | |
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| Schedule of contractual maturities of investments in debt securities available-for-sale |
The following table shows the contractual maturities of investments in debt securities available-for-sale at June 30, 2026. Expected maturities will differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. | | | | | | | | | | | | | | | | (Dollars in thousands) | | Amortized Cost | | Fair Value | | Due in one year or less | | $ | 178,761 | | | $ | 176,163 | | | Due after one year through five years | | 557,683 | | | 551,463 | | | Due after five years through ten years | | 76,886 | | | 76,412 | | | Due after ten years | | 32,009 | | | 32,058 | | | Mortgage-backed securities | | 743,150 | | | 691,593 | | | Total debt securities available-for-sale | | $ | 1,588,489 | | | $ | 1,527,689 | |
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| Schedule of gross realized gains and losses from securities available-for-sale |
The following table summarizes gross unrealized losses and fair value by investment category and age. At June 30, 2026, the Company’s available-for-sale securities portfolio consisted of 642 securities, 525 of which were in an unrealized loss position. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Less than 12 Months | | 12 months or Longer | | Total | | (Dollars in thousands) | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | June 30, 2026 | | | | | | | | | | | | | | U.S. Treasury and Federal agencies securities | | $ | 517,487 | | | $ | (5,961) | | | $ | 150,930 | | | $ | (2,467) | | | $ | 668,417 | | | $ | (8,428) | | | U.S. States and political subdivisions securities | | 32,815 | | | (379) | | | 24,557 | | | (1,258) | | | 57,372 | | | (1,637) | | | Mortgage-backed securities - Federal agencies | | 195,788 | | | (2,734) | | | 370,066 | | | (49,743) | | | 565,854 | | | (52,477) | | | Corporate debt securities | | 496 | | | (4) | | | — | | | — | | | 496 | | | (4) | | | | | | | | | | | | | | | | Total debt securities available-for-sale | | $ | 746,586 | | | $ | (9,078) | | | $ | 545,553 | | | $ | (53,468) | | | $ | 1,292,139 | | | $ | (62,546) | | | | | | | | | | | | | | | | December 31, 2025 | | | | | | | | | | | | | | U.S. Treasury and Federal agencies securities | | $ | 146,252 | | | $ | (300) | | | $ | 173,152 | | | $ | (3,746) | | | $ | 319,404 | | | $ | (4,046) | | | U.S. States and political subdivisions securities | | 13,587 | | | (81) | | | 29,532 | | | (1,315) | | | 43,119 | | | (1,396) | | | Mortgage-backed securities - Federal agencies | | 75,414 | | | (355) | | | 415,247 | | | (48,025) | | | 490,661 | | | (48,380) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Total debt securities available-for-sale | | $ | 235,253 | | | $ | (736) | | | $ | 617,931 | | | $ | (53,086) | | | $ | 853,184 | | | $ | (53,822) | |
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| Schedule of proceeds from sales of available-for-sale debt securities portfolio and gross realized gains and losses from the available-for-sale debt securities portfolio |
The following table shows the proceeds from sales of available-for-sale debt securities and the gross realized gains and gross realized losses that have been included in earnings as a result of these sales. Realized gains and losses of all securities are computed using the specific identification cost basis. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended
June 30, | | Six Months Ended
June 30, | | (Dollars in thousands) | | 2026 | | 2025 | | 2026 | | 2025 | | Proceeds from sales | | $ | 777 | | | $ | 25,709 | | | $ | 777 | | | $ | 25,709 | | | Gross realized gains | | 13 | | | — | | | 13 | | | — | | | Gross realized losses | | — | | | (997) | | | — | | | (997) | | | | | | | | | | | | | | | | | | | |
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