SUMMARY OF PER SHARE INFORMATION (Details) - $ / shares	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025
Per Share Data:
Investment income (in usd per share)			$ 2.05	$ 2.15
Operating expenses (in usd per share)			(0.84)	(0.83)
Income taxes (in usd per share)			(0.05)	(0.03)
Net investment income (in usd per share)	$ 0.57	$ 0.66	1.16	1.29
Net realized gain (loss), net of tax (in usd per share)			0.19	(0.21)
Net unrealized (depreciation) appreciation on investments, net of tax (in usd per share)			(0.40)	(0.29)
Total increase from investment operations (in usd per share)			0.95	0.79
Accretive effect of share issuances and repurchases (in usd per share)			0.31	0.40
Dividends to shareholders (in usd per share)			(1.28)	(1.27)
Issuance of restricted stock (in usd per share)			(0.10)	(0.14)
Common stock withheld for payroll taxes upon vesting of restricted stock (in usd per share)			(0.04)	(0.07)
Share based compensation expense (in usd per share)			0.04	0.06
Other (in usd per share)			0.04	0.05
(Decrease) increase in net asset value (in usd per share)			(0.08)	(0.18)
Net asset value
Beginning of period (in usd per share)			16.70	16.77
End of period (in usd per share)	16.62	16.59	$ 16.62	$ 16.59
Ratios and Supplemental Data
Ratio of operating expenses to average net assets			9.94%	9.86%
Ratio of operating expenses (excluding interest expense) to average net assets			3.20%	3.49%
Ratio of net investment income to average net assets			13.75%	15.26%
Portfolio turnover			8.08%	10.44%
Total investment return			0.65%	6.33%
Total return based on change in NAV			7.19%	6.50%
Per share market value at the end of the period (in usd per share)	$ 21.86	$ 25.29	$ 21.86	$ 25.29
Weighted average common shares outstanding – basic (in shares)	55,544,095	47,242,863	54,536,084	46,458,435
Weighted average common shares outstanding – diluted (in shares)	64,830,413	47,242,863	63,809,345	46,458,435
Common shares outstanding at end of period (in shares)	56,966,998	47,687,000	56,966,998	47,687,000	52,912,796