INVESTMENT SECURITIES (Tables)
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6 Months Ended |
Jun. 30, 2026 |
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| INVESTMENT SECURITIES |
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| Schedule of amortized cost and estimated fair value of investment securities |
| | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | December 31, 2025 | | | | | | Gross | | Gross | | | | | | | | Gross | | Gross | | | | | | Amortized | | Unrealized | | Unrealized | | Fair | | Amortized | | Unrealized | | Unrealized | | Fair | (000’s omitted) | | Cost | | Gains | | Losses | | Value | | Cost | | Gains | | Losses | | Value | Available-for-Sale Portfolio: | | | | | | | | | | | | | | | | | | | | | | | | | U.S. Treasury and agency securities | | $ | 2,427,277 | | $ | 16 | | $ | 207,912 | | $ | 2,219,381 | | $ | 2,399,478 | | $ | 0 | | $ | 204,252 | | $ | 2,195,226 | Obligations of state and political subdivisions | | | 462,678 | | | 562 | | | 27,247 | | | 435,993 | | | 417,414 | | | 430 | | | 25,927 | | | 391,917 | Government agency mortgage-backed securities | | | 329,485 | | | 53 | | | 45,087 | | | 284,451 | | | 322,253 | | | 96 | | | 43,464 | | | 278,885 | Corporate debt securities | | | 8,508 | | | 0 | | | 37 | | | 8,471 | | | 5,000 | | | 0 | | | 88 | | | 4,912 | Government agency collateralized mortgage obligations | | | 9,861 | | | 13 | | | 207 | | | 9,667 | | | 4,583 | | | 0 | | | 182 | | | 4,401 | Total available-for-sale portfolio | | $ | 3,237,809 | | $ | 644 | | $ | 280,490 | | $ | 2,957,963 | | $ | 3,148,728 | | $ | 526 | | $ | 273,913 | | $ | 2,875,341 | | | | | | | | | | | | | | | | | | | | | | | | | | Held-to-Maturity Portfolio: | | | | | | | | | | | | | | | | | | | | | | | | | U.S. Treasury and agency securities | | $ | 1,183,312 | | $ | 0 | | $ | 107,538 | | $ | 1,075,774 | | $ | 1,168,487 | | $ | 0 | | $ | 87,003 | | $ | 1,081,484 | Government agency mortgage-backed securities | | | 295,074 | | | 2,537 | | | 904 | | | 296,707 | | | 285,679 | | | 3,537 | | | 236 | | | 288,980 | Total held-to-maturity portfolio | | $ | 1,478,386 | | $ | 2,537 | | $ | 108,442 | | $ | 1,372,481 | | $ | 1,454,166 | | $ | 3,537 | | $ | 87,239 | | $ | 1,370,464 |
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| Schedule of gains and losses on equity and other securities |
| | | | | | | | | | | | | | | Three Months Ended | | Six Months Ended | | | June 30, | | June 30, | (000's omitted) | | 2026 | | 2025 | | 2026 | | 2025 | Net gain (loss) recognized on equity securities | | $ | 4,710 | | $ | (1) | | $ | 4,309 | | $ | 244 | Less: Net (gain) loss recognized on equity securities sold during the period | | | (4,234) | | | 0 | | | (4,234) | | | 0 | Unrealized gain (loss) recognized on equity securities still held | | $ | 476 | | $ | (1) | | $ | 75 | | $ | 244 |
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| Schedule of investment securities that have been in a continuous unrealized loss position |
As of June 30, 2026 | | | | | | | | | | | | | | | | | | | | Less than 12 Months | | 12 Months or Longer | | Total | | | | | Gross | | | | Gross | | | | Gross | | | | | Unrealized | | | | Unrealized | | | | Unrealized | (000’s omitted) | | Fair Value | | Losses | | Fair Value | | Losses | | Fair Value | | Losses | Available-for-Sale Portfolio: | | | | | | | | | | | | | | | | | | | U.S. Treasury and agency securities | | $ | 20,294 | | $ | 114 | | $ | 2,194,720 | | $ | 207,798 | | $ | 2,215,014 | | $ | 207,912 | Obligations of state and political subdivisions | | | 88,426 | | | 1,090 | | | 253,871 | | | 26,157 | | | 342,297 | | | 27,247 | Government agency mortgage-backed securities | | | 29,213 | | | 241 | | | 251,086 | | | 44,846 | | | 280,299 | | | 45,087 | Corporate debt securities | | | 3,496 | | | 12 | | | 4,975 | | | 25 | | | 8,471 | | | 37 | Government agency collateralized mortgage obligations | | | 4,763 | | | 20 | | | 3,387 | | | 187 | | | 8,150 | | | 207 | Total available-for-sale investment portfolio | | $ | 146,192 | | $ | 1,477 | | $ | 2,708,039 | | $ | 279,013 | | $ | 2,854,231 | | $ | 280,490 | | | | | | | | | | | | | | | | | | | | Held-to-Maturity Portfolio: | | | | | | | | | | | | | | | | | | | U.S. Treasury and agency securities | | $ | 0 | | $ | 0 | | $ | 1,075,774 | | $ | 107,538 | | $ | 1,075,774 | | $ | 107,538 | Government agency mortgage-backed securities | | | 76,666 | | | 800 | | | 7,575 | | | 104 | | | 84,241 | | | 904 | Total held-to-maturity portfolio | | $ | 76,666 | | $ | 800 | | $ | 1,083,349 | | $ | 107,642 | | $ | 1,160,015 | | $ | 108,442 |
As of December 31, 2025 | | | | | | | | | | | | | | | | | | | | | Less than 12 Months | | 12 Months or Longer | | Total | | | | | Gross | | | | Gross | | | | Gross | | | | | Unrealized | | | | Unrealized | | | | Unrealized | (000’s omitted) | | Fair Value | | Losses | | Fair Value | | Losses | | Fair Value | | Losses | Available-for-Sale Portfolio: | | | | | | | | | | | | | | | | | | | U.S. Treasury and agency securities | | $ | 0 | | $ | 0 | | $ | 2,195,226 | | $ | 204,252 | | $ | 2,195,226 | | $ | 204,252 | Obligations of state and political subdivisions | | | 12,210 | | | 22 | | | 284,268 | | | 25,905 | | | 296,478 | | | 25,927 | Government agency mortgage-backed securities | | | 200 | | | 0 | | | 272,150 | | | 43,464 | | | 272,350 | | | 43,464 | Corporate debt securities | | | 0 | | | 0 | | | 4,912 | | | 88 | | | 4,912 | | | 88 | Government agency collateralized mortgage obligations | | | 0 | | | 0 | | | 4,397 | | | 182 | | | 4,397 | | | 182 | Total available-for-sale investment portfolio | | $ | 12,410 | | $ | 22 | | $ | 2,760,953 | | $ | 273,891 | | $ | 2,773,363 | | $ | 273,913 | | | | | | | | | | | | | | | | | | | | Held-to-Maturity Portfolio: | | | | | | | | | | | | | | | | | | | U.S. Treasury and agency securities | | $ | 0 | | $ | 0 | | $ | 1,081,484 | | $ | 87,003 | | $ | 1,081,484 | | $ | 87,003 | Government agency mortgage-backed securities | | | 31,274 | | | 146 | | | 13,662 | | | 90 | | | 44,936 | | | 236 | Total held-to-maturity portfolio | | $ | 31,274 | | $ | 146 | | $ | 1,095,146 | | $ | 87,093 | | $ | 1,126,420 | | $ | 87,239 |
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| Schedule of amortized cost and estimated fair value of debt securities by contractual maturity |
| | | | | | | | | | | | | | | Held-to-Maturity | | Available-for-Sale | | | Amortized | | Fair | | Amortized | | Fair | (000’s omitted) | | Cost | | Value | | Cost | | Value | Due in one year or less | | $ | 0 | | $ | 0 | | $ | 502,545 | | $ | 495,584 | Due after one through five years | | | 408,697 | | | 392,465 | | | 1,479,371 | | | 1,400,752 | Due after five years through ten years | | | 176,879 | | | 169,518 | | | 467,320 | | | 409,077 | Due after ten years | | | 597,736 | | | 513,791 | | | 449,227 | | | 358,432 | Subtotal | | | 1,183,312 | | | 1,075,774 | | | 2,898,463 | | | 2,663,845 | Government agency mortgage-backed securities | | | 295,074 | | | 296,707 | | | 329,485 | | | 284,451 | Government agency collateralized mortgage obligations | | | 0 | | | 0 | | | 9,861 | | | 9,667 | Total | | $ | 1,478,386 | | $ | 1,372,481 | | $ | 3,237,809 | | $ | 2,957,963 |
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