FAIR VALUE MEASURES - Summary of Fair Value Measurements of Assets Measured at Fair Value on Non-Recurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value	$ 31,972	$ 251,125
Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value	0	0
Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value	0	0
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value	31,972	251,125
Collateral-dependent loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value	31,972	44,181
Collateral-dependent loans | Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value	0	0
Collateral-dependent loans | Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value	0	0
Collateral-dependent loans | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value	$ 31,972	44,181
Mortgage servicing rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value		206,944
Mortgage servicing rights | Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value		0
Mortgage servicing rights | Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value		0
Mortgage servicing rights | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets at fair value		$ 206,944