EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Numerator for basic earnings per share	$ 17,561	$ 16,268	$ 22,684	$ 14,035	$ 13,469	$ 23,484	$ 22,624	$ 23,812	$ 70,548	$ 83,389	$ 33,093
Adjustment for income allocated to participating securities									(689)	0	0
Numerator for basic earnings per common share									$ 69,859	$ 83,389	$ 33,093
Denominator for basic weighted average common share(in shares)									47,448,093	40,727,133	30,015,533	22,840,000	19,060,000	18,000,000	16,074,000	16,074,000	15,825,000
Net increase in net assets from operations – basic (in usd per share)	$ 0.34	$ 0.34	$ 0.48	$ 0.31	$ 0.31	$ 0.57	$ 0.57	$ 0.63	$ 1.47	$ 2.05	$ 1.10
Net Income (Loss) Available to Common Stockholders, Diluted									$ 69,859	$ 83,389	$ 33,093
Adjustment for interest and amortization on 2029 Convertible Notes									5,263	0	0
Numerator for diluted earnings per common share									$ 75,122	$ 83,389	$ 33,093
Adjustment for dilutive effect of 2029 Convertible Notes									3,740,000	0	0
Denominator for diluted weighted average common shares (in shares)									51,187,714	40,727,133	30,015,533	22,840,000	19,060,000	18,000,000	16,139,000	16,139,000	15,877,000
Net increase in net assets from operations – diluted (in usd per share)	$ 0.35	$ 0.34	$ 0.48	$ 0.31	$ 0.31	$ 0.57	$ 0.57	$ 0.63	$ 1.47	$ 2.05	$ 1.10