FAIR VALUES OF FINANCIAL INSTRUMENTS - Summary of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements Other than Goodwill (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
State and municipal securities | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 2,388	$ 1,955
State and municipal securities | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Maturity/Call date	1 month	1 month
State and municipal securities | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Maturity/Call date	5 years	5 years
US Muni BQ curve	BBB	BBB
State and municipal securities | Discounted cash flow | Discount rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.034	0.036
State and municipal securities | Discounted cash flow | Discount rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.059	0.057
State and municipal securities | Discounted cash flow | Weighted-average coupon | Weighted-average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.038	0.036
Corporate obligations | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 31
Corporate obligations | Discounted cash flow | Weighted-average coupon | Weighted-average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0
Corporate obligations | Discounted cash flow | Risk free rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.0026
Corporate obligations | Discounted cash flow | plus premium for illiquidity (basis points)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.0200
Corporate obligations and U.S. Government-sponsored mortgage-backed securities | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 31
Corporate obligations and U.S. Government-sponsored mortgage-backed securities | Discounted cash flow | Weighted-average coupon | Weighted-average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input		0
Corporate obligations and U.S. Government-sponsored mortgage-backed securities | Discounted cash flow | Risk free rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input		0.0026
Corporate obligations and U.S. Government-sponsored mortgage-backed securities | Discounted cash flow | plus premium for illiquidity (basis points)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input		0.0200
Collateral dependent loans | Collateral based measurements
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 69,075	$ 65,302
Collateral dependent loans | Collateral based measurements | Discount to reflect current market conditions and ultimate collectability | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0	0.01
Collateral dependent loans | Collateral based measurements | Discount to reflect current market conditions and ultimate collectability | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.90	0.16
Collateral dependent loans | Collateral based measurements | Weighted-average discount by loan balance | Weighted-average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.264	0.015