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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONCENTRATION (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Mortgage Banking Activities
Initial amortization period of MSRs	7 years
Loan servicing income	$ 3,290,000	$ 3,370,000	$ 3,518,000
Other Assets
Mortgage Banking Activities
Accrued interest on AFS debt securities excluded from ACLS	3,000,000	2,000,000
Accrued interest on HTM debt securities excluded from ACLS	60,000	384,000
Accrued interest on loans	$ 17,000,000	$ 16,000,000
Minimum | Installment loan | Republic Credit Solutions
Mortgage Banking Activities
Loan held-for-sale term	12 months
Minimum | Line of Credit and Healthcare Receivables | Republic Credit Solutions
Mortgage Banking Activities
Percentage of loan receivable held for sale (as a percent)	90.00%
Maximum | Installment loan | Republic Credit Solutions
Mortgage Banking Activities
Loan held-for-sale term	60 months
Term for intent to sell loans	16 days
Maximum | Line of Credit and Healthcare Receivables | Republic Credit Solutions
Mortgage Banking Activities
Percentage of loan receivable held for sale (as a percent)	95.00%
Warehouse lines of credit. | Geographic concentration risk | CALIFORNIA
Mortgage Banking Activities
Percentage of concentration risk	25.00%
Net Revenue | Geographic concentration risk | Total Republic Processing Group
Mortgage Banking Activities
Percentage of concentration risk	34.00%	32.00%	31.00%
Net Revenue | Geographic concentration risk | Tax Refund Solutions
Mortgage Banking Activities
Percentage of concentration risk	13.00%	13.00%	16.00%
Net Revenue | Geographic concentration risk | Republic Payment Solutions
Mortgage Banking Activities
Percentage of concentration risk	4.00%	5.00%	2.00%
Net Revenue | Geographic concentration risk | Republic Credit Solutions
Mortgage Banking Activities
Percentage of concentration risk	17.00%	14.00%	13.00%
Net Revenue | Geographic concentration risk | Warehouse Lending
Mortgage Banking Activities
Percentage of concentration risk	3.00%	3.00%	4.00%

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Accrued interest on available for sale debt securities excluded from Allowances for credit losses on securities.

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The amount of accrued interest on loans.

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