BORROWINGS - Schedule of Issued and Outstanding SBA Debentures (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2024 USD ($) poolingDate	Jun. 30, 2023	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Debenture Amount	$ 743,875		$ 779,875
Unsecured Debt | SBA Debentures
Debt Instrument [Line Items]
Debenture Amount	$ 153,000		$ 153,000
Number of pooling date | poolingDate	2
Weighted-average interim interest rate	4.38%	3.94%
Unsecured Debt | Debentures due September 2031
Debt Instrument [Line Items]
Fixed Interest Rate	1.575%
Debenture Amount	$ 15,000
Unsecured Debt | Debentures due March 2032
Debt Instrument [Line Items]
Fixed Interest Rate	3.209%
Debenture Amount	$ 25,000
Unsecured Debt | Debentures due September 2032
Debt Instrument [Line Items]
Fixed Interest Rate	4.435%
Debenture Amount	$ 40,000
Unsecured Debt | Debentures due March 2033
Debt Instrument [Line Items]
Fixed Interest Rate	5.215%
Debenture Amount	$ 40,000
Unsecured Debt | Debentures due September 2033
Debt Instrument [Line Items]
Fixed Interest Rate	5.735%
Debenture Amount	$ 10,000
Unsecured Debt | Debentures due March 2034
Debt Instrument [Line Items]
Fixed Interest Rate	5.164%
Debenture Amount	$ 15,000
Unsecured Debt | Debentures pooling September 2024
Debt Instrument [Line Items]
Debenture Amount	$ 8,000
Weighted-average interim interest rate	5.91%