FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Additional Information About the Unobservable Inputs Used in Fair Value Measurement of Mortgage Servicing Rights (Details) $ in Thousands	Jun. 30, 2026 USD ($)	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
FAIR VALUE OF FINANCIAL INSTRUMENTS
Mortgage servicing rights, at fair value	$ 19,339	$ 20,090	$ 16,944	$ 17,768	$ 18,519	$ 18,827
Fair Value, Recurring
FAIR VALUE OF FINANCIAL INSTRUMENTS
Mortgage servicing rights, at fair value	19,339		16,944
Fair Value, Recurring \| Level 3 Inputs
FAIR VALUE OF FINANCIAL INSTRUMENTS
Mortgage servicing rights, at fair value	19,339		16,944
Fair Value, Recurring \| Level 3 Inputs \| Valuation Technique, Discounted Cash Flow
FAIR VALUE OF FINANCIAL INSTRUMENTS
Mortgage servicing rights, at fair value	$ 19,339		$ 16,944
Fair Value, Recurring \| Level 3 Inputs \| Constant pre-payment rates (CPR) \| Minimum \| Valuation Technique, Discounted Cash Flow
FAIR VALUE OF FINANCIAL INSTRUMENTS
Measurement input	0.045		0.049
Fair Value, Recurring \| Level 3 Inputs \| Constant pre-payment rates (CPR) \| Maximum \| Valuation Technique, Discounted Cash Flow
FAIR VALUE OF FINANCIAL INSTRUMENTS
Measurement input	0.917		0.943
Fair Value, Recurring \| Level 3 Inputs \| Constant pre-payment rates (CPR) \| Weighted Average \| Valuation Technique, Discounted Cash Flow
FAIR VALUE OF FINANCIAL INSTRUMENTS
Measurement input	0.077		0.081
Fair Value, Recurring \| Level 3 Inputs \| Discount rate \| Minimum \| Valuation Technique, Discounted Cash Flow
FAIR VALUE OF FINANCIAL INSTRUMENTS
Measurement input	0.090		0.090
Fair Value, Recurring \| Level 3 Inputs \| Discount rate \| Maximum \| Valuation Technique, Discounted Cash Flow
FAIR VALUE OF FINANCIAL INSTRUMENTS
Measurement input	0.180		0.110
Fair Value, Recurring \| Level 3 Inputs \| Discount rate \| Weighted Average \| Valuation Technique, Discounted Cash Flow
FAIR VALUE OF FINANCIAL INSTRUMENTS
Measurement input	0.104		0.096