FAIR VALUES OF FINANCIAL INSTRUMENTS - Summary of Description of Valuation Methodologies Used for Instruments Measured at Fair Value on a Non-Recurring Basis and Recognized in the Balance Sheets (Details) - Nonrecurring - Collateral dependent loans - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Collateral dependent loans | $ 56,828 | $ 65,302 |
| Quoted Prices in Active Markets for Identical Assets (Level 1) | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Collateral dependent loans | 0 | 0 |
| Significant Other Observable Inputs (Level 2) | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Collateral dependent loans | 0 | 0 |
| Significant Unobservable Inputs (Level 3) | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Collateral dependent loans | $ 56,828 | $ 65,302 |