LOANS HELD FOR INVESTMENT - Selected Information on TDRs includes Recorded Investment by Loan Class and Modification Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 146,403	$ 39,569
Post-Modification Outstanding Recorded Investment			$ 23,616
Payment Plan [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	3,273	0
Trial Modification [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	305	501
Interest Rate [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	2,984	1,610
Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	131,549	4,442
Combination of Interest Rate Reduction And Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	5,064	30,903
Other Loan Modifications [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	3,228	2,113
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 960	$ 1,738
Percentage of Total by Portfolio Classes	0.04%	0.06%
Post-Modification Outstanding Recorded Investment			7,100
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Payment Plan [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 0	$ 0
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Trial Modification [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	305	501
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Interest Rate [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	598	999
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	57	238
Residential Portfolio Segment [Member] | Conventional Residential Mortgage Loans [Member] | Other Loan Modifications [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 120	$ 0
Percentage of Total by Portfolio Classes	0.05%	0.00%
Post-Modification Outstanding Recorded Investment			0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Payment Plan [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 0	$ 0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Trial Modification [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Interest Rate [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	120	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Other Loan Modifications [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 127,535	$ 32,392
Percentage of Total by Portfolio Classes	4.97%	1.40%
Post-Modification Outstanding Recorded Investment			5,890
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Payment Plan [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 0	$ 0
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Trial Modification [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Interest Rate [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	127,161	2,222
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	374	30,170
Commercial Portfolio Segment [Member] | Commercial Mortgage Loans [Member] | Other Loan Modifications [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 10,235	$ 371
Percentage of Total by Portfolio Classes	0.30%	0.01%
Post-Modification Outstanding Recorded Investment			4,928
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Payment Plan [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 3,273	$ 0
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Trial Modification [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Interest Rate [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	79	186
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	2,864	185
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	4,019	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member] | Other Loan Modifications [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Auto loans [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 3,861	$ 2,773
Percentage of Total by Portfolio Classes	0.19%	0.14%
Post-Modification Outstanding Recorded Investment			3,454
Consumer Portfolio Segment [Member] | Auto loans [Member] | Payment Plan [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 0	$ 0
Consumer Portfolio Segment [Member] | Auto loans [Member] | Trial Modification [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Auto loans [Member] | Interest Rate [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Auto loans [Member] | Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	442	474
Consumer Portfolio Segment [Member] | Auto loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	220	215
Consumer Portfolio Segment [Member] | Auto loans [Member] | Other Loan Modifications [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	3,199	2,084
Consumer Portfolio Segment [Member] | Finance Leases [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment			591
Consumer Portfolio Segment [Member] | Personal Loans [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 190	$ 340
Percentage of Total by Portfolio Classes	0.05%	0.09%
Post-Modification Outstanding Recorded Investment			394
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Payment Plan [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 0	$ 0
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Trial Modification [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Interest Rate [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	12	138
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	178	202
Consumer Portfolio Segment [Member] | Personal Loans [Member] | Other Loan Modifications [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 2,905	$ 1,424
Percentage of Total by Portfolio Classes	0.90%	0.43%
Post-Modification Outstanding Recorded Investment			816
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Payment Plan [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 0	$ 0
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Trial Modification [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Interest Rate [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	2,905	1,424
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Combination of Interest Rate Reduction And Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member] | Other Loan Modifications [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 597	$ 531
Percentage of Total by Portfolio Classes	0.40%	0.34%
Post-Modification Outstanding Recorded Investment			$ 443
Consumer Portfolio Segment [Member] | Other Loans [Member] | Payment Plan [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 0	$ 0
Consumer Portfolio Segment [Member] | Other Loans [Member] | Trial Modification [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Other Loans [Member] | Interest Rate [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	0	0
Consumer Portfolio Segment [Member] | Other Loans [Member] | Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	352	424
Consumer Portfolio Segment [Member] | Other Loans [Member] | Combination of Interest Rate Reduction And Term Extension [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	216	78
Consumer Portfolio Segment [Member] | Other Loans [Member] | Other Loan Modifications [Member]
Financing Receivable Modifications [Line Items]
Loans modified to borrowers experiencing financial difficulty	$ 29	$ 29