Derivatives - Schedule of Interest Rate Swap Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited
Open Forward Foreign Currency Contract [Line Items]
Gross Amount of Recognized Assets	$ 0
Unrealized depreciation	(1,384)
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Maturing June 15, 2029 1
Open Forward Foreign Currency Contract [Line Items]
Gross Amount of Recognized Assets	0
Unrealized depreciation	(1,384)
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Maturing June 15, 2029 2
Open Forward Foreign Currency Contract [Line Items]
Notional Amount	150,000
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc.
Open Forward Foreign Currency Contract [Line Items]
Gross Amount of Recognized Assets	2,691	$ 31,486
Unrealized depreciation	(8,764)	0
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc., Maturing June 15, 2029
Open Forward Foreign Currency Contract [Line Items]
Notional Amount		600,000
Gross Amount of Recognized Assets		9,263
Unrealized depreciation		0
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc., Maturing June 15, 2029 1
Open Forward Foreign Currency Contract [Line Items]
Notional Amount	600,000
Gross Amount of Recognized Assets	0
Unrealized depreciation	(7,497)
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc., Maturing November 5, 2028 1
Open Forward Foreign Currency Contract [Line Items]
Notional Amount	225,000	225,000
Gross Amount of Recognized Assets	0	8,925
Unrealized depreciation	(1,267)	0
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc., Maturing November 5, 2028 2
Open Forward Foreign Currency Contract [Line Items]
Notional Amount	225,000	225,000
Gross Amount of Recognized Assets	2,691	13,298
Unrealized depreciation	$ 0	$ 0

Fair value, before 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 elected not to be offset. Excludes assets not subject to a master netting arrangement.

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