Consolidated Statements of Assets and Liabilities - USD ($) $ in Thousands |
Jun. 30, 2025 |
Sep. 30, 2024 |
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| Assets: | ||||||||
| Investments – Non-control/Non-affiliate, at fair value (cost June 30, 2025: $6,315,137; cost September 30, 2024: $4,530,412) | $ 6,362,926 | [1] | $ 4,576,233 | [2] | ||||
| Cash and cash equivalents | 423,229 | 480,836 | ||||||
| Restricted cash | 48,070 | 43,328 | ||||||
| Interest receivable | 40,354 | 34,549 | ||||||
| Receivables from unsettled transactions | 69,188 | 45,731 | ||||||
| Deferred financing costs | 19,371 | 20,150 | ||||||
| Deferred offering costs | 1,201 | 554 | ||||||
| Derivative assets at fair value | 15,079 | 21,546 | ||||||
| Other assets | 18,778 | 439 | ||||||
| Total assets | 6,998,196 | 5,223,366 | ||||||
| Liabilities: | ||||||||
| Accounts payable, accrued expenses and other liabilities | 2,255 | 2,886 | ||||||
| Dividends payable | 37,039 | 26,238 | ||||||
| Base management fee and incentive fee payable | 17,675 | 17,395 | ||||||
| Payable for share repurchases | 175,010 | 14,635 | ||||||
| Due to broker | 1,410 | 4,040 | ||||||
| Due to affiliates | 3,729 | 3,727 | ||||||
| Interest payable | 27,639 | 26,370 | ||||||
| Payables from unsettled transactions | 102,430 | 97,396 | ||||||
| Director fees payable | 0 | 116 | ||||||
| Derivative liabilities at fair value | 20,475 | 11,927 | ||||||
| Deferred tax liability | 35 | 8 | ||||||
| Credit facilities payable | 1,638,900 | 1,095,000 | ||||||
| Unsecured notes payable (net of $7,126 and $8,526 of unamortized financing costs as of June 30, 2025 and September 30, 2024, respectively) | 754,839 | 759,288 | ||||||
| Total liabilities | 2,781,436 | 2,059,026 | ||||||
| Commitments and contingencies (Note 12) | ||||||||
| Net assets: | ||||||||
| Common shares, $0.01 par value per share; unlimited shares authorized, 182,204 and 134,288 shares issued and outstanding as of June 30, 2025 and September 30, 2024, respectively | 1,822 | 1,343 | ||||||
| Additional paid-in-capital | 4,291,097 | 3,170,746 | ||||||
| Accumulated distributable earnings (loss) | (76,159) | (7,749) | ||||||
| Total net assets (equivalent to $23.14 and $23.56 per common share as of June 30, 2025 and September 30, 2024, respectively) (Note 10) | 4,216,760 | 3,164,340 | ||||||
| Total liabilities and net assets | $ 6,998,196 | $ 5,223,366 | ||||||
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| X | ||||||||||
- Definition Payable Under Repurchase Agreement No definition available.
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| X | ||||||||||
- Definition Amount payable to other broker-dealer and clearing organization, including, but not limited to, security failed-to-receive, deposit received for security loaned, open transaction, and floor-brokerage payable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of liabilities incurred and payable to vendors for goods and services received, and accrued liabilities classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of excess of issue price over par or stated value of stock and from other transaction involving stock or stockholder. Includes, but is not limited to, additional paid-in capital (APIC) for common and preferred stock. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of asset recognized for present right to economic benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of interest payable on debt, including, but not limited to, trade payables. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Fair value of investment in security owned. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of liability recognized for present obligation requiring transfer or otherwise providing economic benefit to others. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of management and incentive fees payable for performance under arrangement to manage operation, including, but not limited to, managing investment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of assets classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of liabilities classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of payable for purchase of investment. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of receivable from sale of investment. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of accumulated undistributed earnings (deficit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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