Consolidated Schedule of Investments - Derivatives € in Thousands, £ in Thousands, kr in Thousands	Jun. 30, 2024 USD ($)	Jun. 30, 2024 EUR (€)	Jun. 30, 2024 GBP (£)	Jun. 30, 2024 DKK (kr)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 EUR (€)	Sep. 30, 2023 GBP (£)
Schedule of Investments [Line Items]
Derivative assets at fair value	$ 2,943,000				$ 2,041,000
Foreign currency forward contract
Schedule of Investments [Line Items]
Derivative assets at fair value	2,086,000				2,041,000
Derivative liability at fair value	(586,000)				0
Derivative assets (liability)	1,500,000
Interest rate swap
Schedule of Investments [Line Items]
Derivative assets at fair value	1,443,000
Derivative liability at fair value	0
Interest rate swap, maturing november 2028
Schedule of Investments [Line Items]
Derivative assets at fair value	1,443,000
Derivative liability at fair value	$ 0
Derivative interest rate	8.40%	8.40%	8.40%	8.40%
Floating interest rate	4.0405%	4.0405%	4.0405%	4.0405%
Notional amount	$ 350,000,000
Open Forward Foreign Currency Contract, Identifier [Axis]: Bank of New York Mellon, Settlement Date 11/9/2023 - 1
Schedule of Investments [Line Items]
Notional Amount to be Purchased					47,642,000
Notional Amount to be Sold | €						€ 43,834
Derivative assets at fair value					1,164,000
Open Forward Foreign Currency Contract, Identifier [Axis]: Bank of New York Mellon, Settlement Date 11/9/2023 - 2
Schedule of Investments [Line Items]
Notional Amount to be Purchased					20,888,000
Notional Amount to be Sold | £							£ 16,392
Derivative assets at fair value					877,000
Open Forward Foreign Currency Contract, Identifier [Axis]: Bank of New York Mellon, Settlement Date 2/8/2024 - 2
Schedule of Investments [Line Items]
Derivative liability at fair value	(160,000)
Open Forward Foreign Currency Contract, Identifier [Axis]: DKK Foreign Currency Forward Contract, Maturing August 8, 2024
Schedule of Investments [Line Items]
Notional Amount to be Purchased	6,683,000
Notional Amount to be Sold | kr				kr 72,797
Derivative liability at fair value	(160,000)
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR Foreign Currency Forward Contract, Maturing August 8, 2024
Schedule of Investments [Line Items]
Notional Amount to be Purchased	164,202,000
Notional Amount to be Sold | €		€ 151,007
Derivative assets at fair value	2,086,000
Open Forward Foreign Currency Contract, Identifier [Axis]: EUR Foreign Currency Forward Contract, Maturing November 9, 2023
Schedule of Investments [Line Items]
Notional Amount to be Purchased					47,642,000
Notional Amount to be Sold | €						€ 43,834
Derivative assets at fair value					1,164,000
Derivative liability at fair value					0
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP Foreign Currency Forward Contract, Maturing August 8, 2024
Schedule of Investments [Line Items]
Notional Amount to be Purchased	156,315,000
Notional Amount to be Sold | £			£ 123,967
Derivative liability at fair value	(426,000)
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP Foreign Currency Forward Contract, Maturing August 9, 2024
Schedule of Investments [Line Items]
Derivative liability at fair value	$ (426,000)
Open Forward Foreign Currency Contract, Identifier [Axis]: GBP Foreign Currency Forward Contract, Maturing November 9, 2023
Schedule of Investments [Line Items]
Notional Amount to be Purchased					20,888,000
Notional Amount to be Sold | £							£ 16,392
Derivative assets at fair value					877,000
Derivative liability at fair value					$ 0