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Amount of expense for capital-gain-based incentive fee for performance under arrangement to manage operation, including, but not limited to, managing investment.

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Amount of fee payable for management of operations based on performance under arrangement, including, but not limited to, investment.

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- Definition

Amount of expense for investment management fee, including, but not limited to, expense in connection with research, selection, supervision, and custody of investment.

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Amount of transactions with related party during the financial reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Related Party Agreements and Transactions (Details)	12 Months Ended
Related Party Agreements and Transactions (Details)	Jun. 30, 2025 USD ($) component	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)
Related Party Transaction [Line Items]
Base management expense	$ 145,756,000	$ 157,001,000	$ 155,084,000
Incentive fee expense	40,772,000	80,548,000	87,435,000
Incentive fee expense, capital-gain-based	0	0	0
Allocation of overhead	22,257,000	25,781,000	20,578,000
Software fees incurred	51,000	177,000	0
Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee	0
Managerial assistance	$ 9,286,000	10,459,000	9,324,000
Investment Advisory Agreement \| Affiliated Entity
Related Party Transaction [Line Items]
Base management fee rate	2.00%
Number of parts to incentive fee \| component	2
Investment Advisory Agreement \| Related Party
Related Party Transaction [Line Items]
Base management expense	$ 145,756,000	157,001,000	155,084,000
Investment Advisory And Management Agreement Incentive Rate Quarterly Hurdle Rate \| Affiliated Entity
Related Party Transaction [Line Items]
Incentive rate	1.75%
Investment Advisory And Management Agreement Incentive Rate Annual Hurdle Rate \| Affiliated Entity
Related Party Transaction [Line Items]
Incentive rate	7.00%
Investment Advisory And Management Agreement Incentive Rate Pre Incentive Fee Net Investment Income Below Catch Up Threshold \| Affiliated Entity
Related Party Transaction [Line Items]
Incentive rate	100.00%
Investment Advisory And Management Agreement Incentive Rate Pre Incentive Fee Net Investment Income Below Catch Up Threshold \| Affiliated Entity \| Maximum
Related Party Transaction [Line Items]
Incentive rate	125.00%
Investment Advisory And Management Agreement Incentive Rate Annual Catch Up Threshold Member \| Affiliated Entity
Related Party Transaction [Line Items]
Incentive rate	8.75%
Investment Advisory And Management Agreement Incentive Rate Pre Incentive Fee Net Investment Income Exceeds Catch Up Threshold Member \| Affiliated Entity
Related Party Transaction [Line Items]
Incentive rate	20.00%
Investment Advisory And Management Agreement Incentive Rate Pre Incentive Fee Net Investment Income Exceeds Catch Up Threshold Member \| Affiliated Entity \| Minimum
Related Party Transaction [Line Items]
Incentive rate	125.00%
Investment Management Agreement - Incentive Rate, Realized Capital Gains \| Affiliated Entity
Related Party Transaction [Line Items]
Incentive rate	20.00%
Administration Agreement \| Affiliated Entity
Related Party Transaction [Line Items]
Administration Agreement, termination period without penalties	60 days
Related party transaction, amounts of transaction	$ 3,524,000	4,435,000	2,664,000
Administration Agreement - Reimbursement \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction			1,212,000
Reimbursements \| Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction	$ 89,000	$ 80,000	$ 85,000