Derivatives - Schedule of Forward Currency Contract, Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	$ 23,368	$ 15,011
Unrealized depreciation on forward currency contracts	(1,003)	(70)
Net amounts presented in the Consolidated Statement of Financial Condition	22,365	14,941
Collateral (received) pledged
Net amount	22,365
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	22,383
Unrealized depreciation on forward currency contracts	(993)
Net amounts presented in the Consolidated Statement of Financial Condition	21,390
Collateral (received) pledged	0
Net amount	21,390
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 1/30/2026
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	74
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 11/12/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	1,741
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 12/23/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	1,163
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 12/9/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	420
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 2/2/2026
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	61
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 2/27/2025
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	3,501	3,397
Unrealized depreciation on forward currency contracts	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 2/5/2025
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	125
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 2/5/2026 Contract 1
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	0
Unrealized depreciation on forward currency contracts	(293)
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 2/5/2026 Contract 2
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	457
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 3/17/2025
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	223
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 3/31/2025
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	1,436	1,968
Unrealized depreciation on forward currency contracts	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 7/15/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	339
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 7/18/2025
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts		203
Unrealized depreciation on forward currency contracts		0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 7/21/2025
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts		0
Unrealized depreciation on forward currency contracts		(70)
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 7/21/2025 Contract 2
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	0
Unrealized depreciation on forward currency contracts	(96)
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 7/21/2025 Contract 1
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	0
Unrealized depreciation on forward currency contracts	(210)
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 7/21/2025 Contract 3
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	0
Unrealized depreciation on forward currency contracts	(394)
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 7/30/2025
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	312
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 8/27/2024 Contract 1
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	813	676
Unrealized depreciation on forward currency contracts	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 8/27/2024 Contract 2
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	1,432	1,174
Unrealized depreciation on forward currency contracts	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 8/27/2024 Contract 3
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	487	3,570
Unrealized depreciation on forward currency contracts	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 8/27/2024 Contract 4
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	2,660
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 8/30/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	1,188	991
Unrealized depreciation on forward currency contracts	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 9/03/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts		3,032
Unrealized depreciation on forward currency contracts		0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 9/27/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	291
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 9/3/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	2,287
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 9/30/2024 Contract 1
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	1,266
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 9/30/2024 Contract 2
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	1,226
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 9/4/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	322
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 9/5/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	343
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date7/18/2025
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	216
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc.
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	985
Unrealized depreciation on forward currency contracts	(10)
Net amounts presented in the Consolidated Statement of Financial Condition	975
Collateral (received) pledged	0
Net amount	975
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc., Settlement Date 1/20/2026 Contract 1
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	360
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc., Settlement Date 1/20/2026 Contract 2
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	382
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc., Settlement Date 2/2/2026
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	50
Unrealized depreciation on forward currency contracts	0
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital Markets, Inc., Settlement Date 2/5/2026
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	0
Unrealized depreciation on forward currency contracts	(10)
Open Forward Foreign Currency Contract, Identifier [Axis]: SMBC Capital markets, Inc., Settlement Date 9/30/2024
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts	193
Unrealized depreciation on forward currency contracts	$ 0
Foreign exchange
Open Forward Foreign Currency Contract [Line Items]
Unrealized appreciation on forward currency contracts		15,011
Unrealized depreciation on forward currency contracts		(70)
Net amounts presented in the Consolidated Statement of Financial Condition		14,941
Collateral (received) pledged		0
Net amount		$ 14,941