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LOANS HELD FOR INVESTMENT - Selected Information on TDRs includes Recorded Investment by Loan Class and Modification Type (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 3,483 | $ 6,769 | $ 39,475 | $ 126,897 | $ 59,020 | $ 129,103
Forbearance [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 196 | 0 |  |
Trial Modification [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 439 | 87 | 686 | 0 |  |
Change in Amortization term [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 30,166 | 766 |  |
Interest Rate [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 936 | 943 | 2,942 | 1,961 |  |
Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 878 | 575 | 2,229 | 116,984 |  |
Combination of Interest Rate Reduction And Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 288 | 4,183 | 777 | 4,620 |  |
Other Loan Modifications [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 942 | 981 | 2,479 | 2,566 |  |
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 557 | $ 87 | $ 1,047 | $ 981 | 1,234 | 1,611
Percentage of Total by Portfolio Classes | 0.02% | 0.00% | 0.04% | 0.04% |  |
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Forbearance [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 0 | $ 0 | $ 0 |  |
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Trial Modification [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 411 | 87 | 538 | 0 |  |
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Change in Amortization term [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 766 |  |
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Interest Rate [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 146 | 0 | 509 | 157 |  |
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 58 |  |
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Other Loan Modifications [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 122 | $ 0 | $ 122 | 0 | 122
Percentage of Total by Portfolio Classes | 0.00% | 0.06% | 0.00% | 0.06% |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Forbearance [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 0 | $ 0 | $ 0 |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Trial Modification [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Change in Amortization term [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Interest Rate [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 122 | 0 | 122 |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Other Loan Modifications [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 0 | $ 30,166 | $ 115,703 | 42,086 | 115,703
Percentage of Total by Portfolio Classes | 0.00% | 0.00% | 1.18% | 4.68% |  |
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Forbearance [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 0 | $ 0 | $ 0 |  |
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Trial Modification [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Change in Amortization term [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 30,166 | 0 |  |
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Interest Rate [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 115,703 |  |
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Other Loan Modifications [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 403 | $ 4,429 | $ 1,301 | $ 4,441 | 6,965 | 4,441
Percentage of Total by Portfolio Classes | 0.01% | 0.14% | 0.04% | 0.14% |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Forbearance [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 0 | $ 196 | $ 0 |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Trial Modification [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Change in Amortization term [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Interest Rate [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 14 | 0 | 26 |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 403 | 335 | 1,008 | 335 |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 4,058 | 80 | 4,058 |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Other Loan Modifications [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 22 | 17 | 22 |  |
Consumer Portfolio Segment [Member] | Auto loans [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 1,377 | $ 1,037 | $ 3,243 | $ 3,023 | 4,123 | 4,075
Percentage of Total by Portfolio Classes | 0.07% | 0.05% | 0.16% | 0.15% |  |
Consumer Portfolio Segment [Member] | Auto loans [Member] | Forbearance [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 0 | $ 0 | $ 0 |  |
Consumer Portfolio Segment [Member] | Auto loans [Member] | Trial Modification [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Auto loans [Member] | Change in Amortization term [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Auto loans [Member] | Interest Rate [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Auto loans [Member] | Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 282 | 41 | 525 | 319 |  |
Consumer Portfolio Segment [Member] | Auto loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 168 | 37 | 290 | 192 |  |
Consumer Portfolio Segment [Member] | Auto loans [Member] | Other Loan Modifications [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 927 | 959 | 2,428 | 2,512 |  |
Consumer Portfolio Segment [Member] | Personal Loans [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 148 | $ 40 | $ 428 | $ 140 | 476 | 205
Percentage of Total by Portfolio Classes | 0.04% | 0.01% | 0.13% | 0.04% |  |
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Forbearance [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 0 | $ 0 | $ 0 |  |
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Trial Modification [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 28 | 0 | 28 | 0 |  |
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Change in Amortization term [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Interest Rate [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 63 | 13 |  |
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 120 | 40 | 337 | 127 |  |
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Other Loan Modifications [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 936 | $ 929 | $ 2,942 | $ 1,935 | 3,675 | 2,394
Percentage of Total by Portfolio Classes | 0.32% | 0.29% | 1.00% | 0.60% |  |
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Forbearance [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 0 | $ 0 | $ 0 |  |
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Trial Modification [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Change in Amortization term [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Interest Rate [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 936 | 929 | 2,942 | 1,935 |  |
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Combination of Interest Rate Reduction And Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Other Loan Modifications [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 62 | $ 125 | $ 348 | $ 552 | $ 461 | $ 552
Percentage of Total by Portfolio Classes | 0.04% | 0.08% | 0.24% | 0.37% |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Forbearance [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 0 | $ 0 | $ 0 | $ 0 |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Trial Modification [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 120 | 0 |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Change in Amortization term [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Interest Rate [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 0 | 0 | 0 |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 47 | 77 | 124 | 335 |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | 0 | 48 | 70 | 185 |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Other Loan Modifications [Member] |  |  |  |  |  |
Financing Receivable Modifications [Line Items] |  |  |  |  |  |
Loans modified to borrowers experiencing financial difficulty | $ 15 | $ 0 | $ 34 | $ 32 |  |

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