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FAIR VALUE MEASUREMENTS - Unobservable Inputs Non-recurring (Details) - Non-recurring - Level 3 - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Fair Value Measurement Inputs and Valuation Techniques [Line Items}
Individually evaluated loans	$ 2,911	$ 3,500
Capitalized servicing rights	6,991	6,764
Premises held for sale	1,154	1,154
Total	11,056	11,418
Quoted prices for similar loans in active markets
Fair Value Measurement Inputs and Valuation Techniques [Line Items}
Individually evaluated loans	2,254	2,437
Discount Cash Flows
Fair Value Measurement Inputs and Valuation Techniques [Line Items}
Individually evaluated loans	$ 657	$ 1,063
Impaired loans | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items}
Loss severity	0.00%	10.00%
Appraised value	$ 215	$ 80
Cash flows	$ 320	$ 2
Discount rate	3.25%	3.25%
Impaired loans | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items}
Loss severity	40.00%	43.00%
Appraised value	$ 916	$ 965
Cash flows	$ 513	$ 520
Discount rate	4.99%	7.13%
Capitalized servicing rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items}
Constant prepayment rate	6.87%	7.20%
Discount rate	10.06%	10.06%
Assets held for sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items}
Premises held for sale	$ 1,154	$ 1,154
Selling Costs	6.00%	6.00%
Assets held for sale | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items}
Appraised value	$ 1,223	$ 1,223

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The balance of financing receivables that were individually evaluated for impairment.

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