SBA-GUARANTEED DEBENTURES - SBIC II Debenture (Details)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Notes principal amount	$ 325,000,000
SBIC Subsidiary
Debt Instrument [Line Items]
Notes principal amount	150,000,000
SBIC Subsidiary II
Debt Instrument [Line Items]
Notes principal amount	$ 175,000,000
SBIC Subsidiary II | Debt Instrument One March 1, 2030
Debt Instrument [Line Items]
Notes interest rate	2.08%
Notes principal amount	$ 6,000,000
Annual charge	0.09
SBIC Subsidiary II | Debt Instrument Two March 1, 2030
Debt Instrument [Line Items]
Notes interest rate	2.08%
Notes principal amount	$ 5,000,000
Annual charge	0.09
SBIC Subsidiary II | Debt Instrument One March 1, 2031
Debt Instrument [Line Items]
Notes interest rate	1.67%
Notes principal amount	$ 9,000,000
Annual charge	0.09
SBIC Subsidiary II | Debt Instrument Two March 1, 2031
Debt Instrument [Line Items]
Notes interest rate	1.67%
Notes principal amount	$ 6,500,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Three March 1, 2031
Debt Instrument [Line Items]
Notes interest rate	1.67%
Notes principal amount	$ 13,500,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Four March 1, 2031
Debt Instrument [Line Items]
Notes interest rate	1.67%
Notes principal amount	$ 10,000,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Five March 1, 2031
Debt Instrument [Line Items]
Notes interest rate	1.67%
Notes principal amount	$ 10,000,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument One September 1, 2031
Debt Instrument [Line Items]
Notes interest rate	1.30%
Notes principal amount	$ 10,000,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Two September 1, 2031
Debt Instrument [Line Items]
Notes interest rate	1.30%
Notes principal amount	$ 6,700,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Three September 1, 2031
Debt Instrument [Line Items]
Notes interest rate	1.30%
Notes principal amount	$ 7,300,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Four September 1, 2031
Debt Instrument [Line Items]
Notes interest rate	1.30%
Notes principal amount	$ 16,000,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument March 1, 2032
Debt Instrument [Line Items]
Notes interest rate	2.94%
Notes principal amount	$ 10,000,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument One September 1, 2032
Debt Instrument [Line Items]
Notes interest rate	4.26%
Notes principal amount	$ 10,000,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Two September 1, 2032
Debt Instrument [Line Items]
Notes interest rate	4.26%
Notes principal amount	$ 6,670,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Three September 1, 2032
Debt Instrument [Line Items]
Notes interest rate	4.26%
Notes principal amount	$ 6,665,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Four September 1, 2032
Debt Instrument [Line Items]
Notes interest rate	4.26%
Notes principal amount	$ 6,665,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Five September 1, 2032
Debt Instrument [Line Items]
Notes interest rate	4.26%
Notes principal amount	$ 3,600,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Six September 1, 2032
Debt Instrument [Line Items]
Notes interest rate	4.26%
Notes principal amount	$ 6,400,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument One March 1, 2033
Debt Instrument [Line Items]
Notes interest rate	5.17%
Notes principal amount	$ 6,000,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument Two March 1, 2033
Debt Instrument [Line Items]
Notes interest rate	5.17%
Notes principal amount	$ 7,600,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument September 1, 2033
Debt Instrument [Line Items]
Notes interest rate	5.69%
Notes principal amount	$ 9,120,000
Annual charge	0.27
SBIC Subsidiary II | Debt Instrument March 1, 2034
Debt Instrument [Line Items]
Notes interest rate	6.04%
Notes principal amount	$ 2,280,000
Annual charge	0.27