FAIR VALUES - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2026		Dec. 31, 2025
Assets:
Fair Value	$ 1,955,403	[1],[2]	$ 1,528,317	[3],[4]
Derivative assets at fair value	1,585		26
Total	1,956,988		1,528,343
Liabilities:
Derivatives	(447)		(1,376)
Total	(447)		(1,376)
Investments in loans and other notes
Assets:
Fair Value	1,688,393		1,176,561
Investments in debt securities
Assets:
Fair Value	267,010		351,756
Level 1
Assets:
Derivative assets at fair value	0		0
Total	0		0
Liabilities:
Derivatives	0		0
Total	0		0
Level 1 | Investments in loans and other notes
Assets:
Fair Value	0		0
Level 1 | Investments in debt securities
Assets:
Fair Value	0		0
Level 2
Assets:
Derivative assets at fair value	1,585		26
Total	268,595		351,782
Liabilities:
Derivatives	(447)		(1,376)
Total	(447)		(1,376)
Level 2 | Investments in loans and other notes
Assets:
Fair Value	0		0
Level 2 | Investments in debt securities
Assets:
Fair Value	267,010		351,756
Level 3
Assets:
Derivative assets at fair value	0		0
Total	1,688,393		1,176,561
Liabilities:
Derivatives	0		0
Total	0		0
Level 3 | Investments in loans and other notes
Assets:
Fair Value	1,688,393		1,176,561
Level 3 | Investments in debt securities
Assets:
Fair Value	$ 0		$ 0

[1] Maturity date is based on the fully extended maturity date of the instrument for investments in loans and other notes or rated final distribution date for investments in debt securities; however, investments may be repaid before such date.

[2] Under the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the "1940 Act"), the Company is generally deemed to "control" a portfolio company if the Company owns more than 25% of its outstanding voting securities and/or holds the power to exercise control over the management or policies of the portfolio company. Under the 1940 Act, the Company is generally deemed an "affiliated person" of a portfolio company if the Company owns 5% or more of the portfolio company's outstanding voting securities. As of March 31, 2026, the Company did not own more than 5% of a portfolio company's outstanding voting securities.

[3] Maturity date is based on the fully extended maturity date of the instrument for investments in loans and other notes or rated final distribution date for investments in debt securities; however investments may be repaid before such date.

[4] Under the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the "1940 Act"), the Company is generally deemed to "control" a portfolio company if the Company owns more than 25% of its outstanding voting securities and/or holds the power to exercise control over the management or policies of the portfolio company. Under the 1940 Act, the Company is generally deemed an "affiliated person" of a portfolio company if the Company owns 5% or more of the portfolio company's outstanding voting securities. As of December 31, 2025, the Company did not own more than 5% of a portfolio company's outstanding voting securities.