INVESTMENT SECURITIES - Schedule of Amortized Cost and Fair Value Held-to-Maturity (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Held-to-Maturity | ||
| Allowance for securities held-to-maturity | $ (150) | $ (150) |
| Total held-to-maturity securities | 2,844,504 | 2,895,488 |
| Unrealized Gains | 580 | 853 |
| Unrealized Losses | (376,876) | (356,103) |
| Fair Value | 2,468,208 | 2,540,238 |
| U.S. government-sponsored entities and agencies | ||
| Held-to-Maturity | ||
| Amortized Cost | 825,359 | 840,435 |
| Unrealized Gains | 0 | 0 |
| Unrealized Losses | (137,815) | (129,526) |
| Fair Value | 687,544 | 710,909 |
| Mortgage-backed securities - Agency | ||
| Held-to-Maturity | ||
| Amortized Cost | 881,022 | 910,323 |
| Unrealized Gains | 0 | 0 |
| Unrealized Losses | (135,338) | (127,505) |
| Fair Value | 745,684 | 782,818 |
| States and political subdivisions | ||
| Held-to-Maturity | ||
| Amortized Cost | 1,138,273 | 1,144,880 |
| Unrealized Gains | 580 | 853 |
| Unrealized Losses | (103,723) | (99,072) |
| Fair Value | $ 1,035,130 | $ 1,046,661 |
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- Definition Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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- References No definition available.
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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