LOANS - Investment Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	$ 391,157	$ 482,563
Fair Value	394,471	469,801
Food Services and Drinking Places | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	34,783	43,779
Fair Value	36,835	43,955
Professional, Scientific, and Technical Services | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	31,885	36,248
Fair Value	32,384	35,377
Specialty Trade Contractors | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	30,964	40,193
Fair Value	30,776	35,451
Ambulatory Health Care Services | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	22,289	27,291
Fair Value	22,559	26,633
Amusement, Gambling, and Recreation Industries | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	17,383	21,289
Fair Value	18,430	22,839
Administrative and Support Services | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	17,425	21,319
Fair Value	17,003	19,521
Merchant Wholesalers, Durable Goods | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	16,094	21,873
Fair Value	15,638	21,152
Repair and Maintenance | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	13,201	15,886
Fair Value	14,304	17,005
Personal and Laundry Services | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	13,120	12,867
Fair Value	13,890	13,584
Merchant Wholesalers, Nondurable Goods | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	11,970	15,623
Fair Value	11,852	15,573
Social Assistance | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	8,544	8,857
Fair Value	9,303	9,721
Fabricated Metal Product Manufacturing | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	9,832	12,439
Fair Value	9,227	13,205
Truck Transportation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	2,100	2,100
Fair Value	1,000	1,100
Truck Transportation | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	11,388	15,590
Fair Value	8,897	12,113
Construction of Buildings | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	9,056	9,868
Fair Value	8,423	9,890
Food Manufacturing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	4,700	4,700
Fair Value	4,200	3,400
Food Manufacturing | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	8,994	10,233
Fair Value	8,392	8,714
Accommodation | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	7,701	9,259
Fair Value	8,144	10,162
Support Activities for Mining | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	7,209	8,455
Fair Value	7,082	7,754
Transportation Equipment Manufacturing | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	6,519	7,687
Fair Value	6,897	7,999
Rental and Leasing Services | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	6,159	6,764
Fair Value	6,482	7,178
Food and Beverage Stores | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	6,167	7,026
Fair Value	6,408	7,306
Motor Vehicle and Parts Dealers | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	6,208	9,046
Fair Value	6,303	9,382
Nursing and Residential Care Facilities | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	5,834	6,182
Fair Value	6,234	6,709
Educational Services | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	4,528	5,368
Fair Value	4,822	5,636
Building Material and Garden Equipment and Supplies Dealers | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	4,334	7,384
Fair Value	4,476	6,781
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost		300
Fair Value		200
Other | SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost	79,570	102,037
Fair Value	$ 79,710	$ 96,161