Derivatives - Open Forward Foreign Currency Contract (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	Jun. 30, 2024 CAD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 GBP (£)	Jun. 30, 2024 EUR (€)	Jun. 30, 2024 AUD ($)	Sep. 30, 2023 CAD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 GBP (£)	Sep. 30, 2023 EUR (€)
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)
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)
Open Forward Foreign Currency Contract, Identifier [Axis]: Macquarie Bank Limited, Settlement Date 1/30/2026
Open Forward Foreign Currency Contract [Line Items]
Currency to be sold | €				€ 3,900
Currency to be purchased		4,371
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]
Currency to be sold | €				14,650
Currency to be purchased		17,567
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]
Currency to be sold | €				12,400
Currency to be purchased		14,586
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]
Currency to be sold	$ 5,200
Currency to be purchased		4,245
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]
Currency to be sold | £			£ 21,900
Currency to be purchased		27,811
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]
Currency to be sold | €				26,000					€ 26,000
Currency to be purchased		31,803					31,803
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]
Currency to be sold | €				7,900
Currency to be purchased		8,682
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]
Currency to be sold					$ 26,100
Currency to be purchased		17,179
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]
Currency to be sold | €				35,000
Currency to be purchased		39,008
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]
Currency to be sold | £			5,600
Currency to be purchased		7,321
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]
Currency to be sold | £			13,945					£ 13,945
Currency to be purchased		19,149					19,149
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]
Currency to be sold	10,800
Currency to be purchased		8,235
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]
Currency to be sold						$ 7,000
Currency to be purchased							5,386
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]
Currency to be sold | €									€ 10,100
Currency to be purchased							10,918
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]
Currency to be sold | €				10,100
Currency to be purchased		10,918
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]
Currency to be sold | €				20,700
Currency to be purchased		22,363
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]
Currency to be sold | £			8,750
Currency to be purchased		10,667
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]
Currency to be sold | €				16,100
Currency to be purchased		17,902
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]
Currency to be sold	15,600					15,600
Currency to be purchased		12,236					12,236
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]
Currency to be sold	30,000					30,000
Currency to be purchased		23,399					23,399
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]
Currency to be sold | £			4,500					25,000
Currency to be purchased		6,182					34,298
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]
Currency to be sold | £			25,000
Currency to be purchased		34,298
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]
Currency to be sold	22,600					$ 22,600
Currency to be purchased		17,739					17,739
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]
Currency to be sold | £								£ 20,550
Currency to be purchased							28,297
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]
Currency to be sold	5,558
Currency to be purchased		4,365
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]
Currency to be sold | £			20,550
Currency to be purchased		28,297
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]
Currency to be sold | £			15,000
Currency to be purchased		20,258
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]
Currency to be sold | £			16,290
Currency to be purchased		21,848
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]
Currency to be sold	6,000
Currency to be purchased		4,717
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]
Currency to be sold | £			6,500
Currency to be purchased		8,567
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]
Currency to be sold	7,000
Currency to be purchased		5,386
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)
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]
Currency to be sold | €				22,000
Currency to be purchased		24,594
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]
Currency to be sold | €				23,750
Currency to be purchased		26,543
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]
Currency to be sold	$ 7,400
Currency to be purchased		5,533
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]
Currency to be sold | £			£ 21,900
Currency to be purchased		27,746
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]
Currency to be sold | €				€ 9,300
Currency to be purchased		10,203
Unrealized appreciation on forward currency contracts		193
Unrealized depreciation on forward currency contracts		$ 0