Quarterly report [Sections 13 or 15(d)]

INVESTMENTS - Narrative (Details)

v3.26.3
INVESTMENTS - Narrative (Details)
$ in Thousands
 6 Months Ended
Sep. 30, 2026
USD ($)
industry
portfolioCompany
state
Mar. 31, 2026
USD ($)
Summary of Investment Holdings [Line Items]    
Number of investment portfolio company | portfolioCompany 31  
Number of states or countries which have invested in the company location | state 20  
Number of industries that have made investments | industry 16  
Investments owned, fair value $ 1,430,865 $ 1,309,248 [1]
Uncollectible receivables allowance, minimum required day for uncollectible adjustment 90 days  
Gross receivables from portfolio companies $ 3,700 2,600
Allowance for uncollectible receivables 1,500 $ 1,400
Five Largest Portfolio Investments | Investment Portfolio Benchmark | Customer Concentration Risk    
Summary of Investment Holdings [Line Items]    
Investments owned, fair value $ 561,200  
Percentage of total investments 39.20%  
[1] Cumulative gross unrealized appreciation for federal income tax purposes is $428.5 million; cumulative gross unrealized depreciation for federal income tax purposes is $173.7 million. Cumulative net unrealized appreciation is $254.8 million, based on a tax cost of $1.1 billion.