Portfolio Investments - Changes in Fair Value of Level 3 Investments (Details)
$ in Thousands |
12 Months Ended |
|
|
Jun. 30, 2026
USD ($)
investment
position
|
Jun. 30, 2025
USD ($)
investment
|
Jun. 30, 2024
USD ($)
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Number of assets transferred out of Level 2 to Level 3 | investment |
2
|
|
1
|
|
|
| Number of equity positions transferred | position |
3
|
|
|
|
|
| Cost |
$ 6,315,369
|
|
$ 6,693,501
|
|
|
| Fair Value |
6,342,558
|
[1] |
6,673,516
|
[2] |
|
| First Lien, Unitranche |
|
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Cost |
219,582
|
|
201,585
|
|
$ 22,359
|
| Fair Value |
155,717
|
|
166,464
|
|
$ 22,413
|
| Investments |
|
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Fair value, beginning balance |
6,591,431
|
|
7,668,592
|
|
|
| Net realized (losses) gains on investments |
(224,295)
|
|
(519,315)
|
|
|
| Net change in unrealized (losses) gains |
118,613
|
|
(287,595)
|
|
|
| Net realized and unrealized (losses) gains |
(105,682)
|
|
(806,910)
|
|
|
| Purchases of portfolio investments |
366,059
|
|
796,359
|
|
|
| Payment-in-kind interest |
75,814
|
|
94,636
|
|
|
| Accretion of discounts and premiums, net |
6,782
|
|
6,820
|
|
|
| Decrease to Subordinated Structured Notes cost, net |
(29,611)
|
|
(77,660)
|
|
|
| Repayments and sales of portfolio investments |
(543,777)
|
|
(1,026,420)
|
|
|
| Transfers within Level 3 |
0
|
|
0
|
|
|
| Transfers out of Level 3 |
(48,947)
|
|
(190,193)
|
|
|
| Transfers into Level 3 |
29,256
|
|
126,207
|
|
|
| Fair value, ending balance |
6,341,325
|
|
6,591,431
|
|
|
| First Lien Revolving Line of Credit |
|
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Fair value, beginning balance |
81,551
|
|
86,544
|
|
|
| Net realized (losses) gains on investments |
0
|
|
0
|
|
|
| Net change in unrealized (losses) gains |
(5,403)
|
|
(1,125)
|
|
|
| Net realized and unrealized (losses) gains |
(5,403)
|
|
(1,125)
|
|
|
| Purchases of portfolio investments |
33,949
|
|
57,591
|
|
|
| Payment-in-kind interest |
2,849
|
|
2,778
|
|
|
| Accretion of discounts and premiums, net |
(12)
|
|
56
|
|
|
| Decrease to Subordinated Structured Notes cost, net |
0
|
|
0
|
|
|
| Repayments and sales of portfolio investments |
(27,353)
|
|
(15,538)
|
|
|
| Transfers within Level 3 |
(13,203)
|
|
(48,755)
|
|
|
| Transfers out of Level 3 |
0
|
|
0
|
|
|
| Transfers into Level 3 |
0
|
|
0
|
|
|
| Fair value, ending balance |
72,378
|
|
81,551
|
|
|
| First Lien Debt |
|
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Fair value, beginning balance |
4,338,576
|
|
4,519,816
|
|
|
| Net realized (losses) gains on investments |
(65,745)
|
|
(9,258)
|
|
|
| Net change in unrealized (losses) gains |
9,598
|
|
(134,545)
|
|
|
| Net realized and unrealized (losses) gains |
(56,147)
|
|
(143,803)
|
|
|
| Purchases of portfolio investments |
259,719
|
|
578,939
|
|
|
| Payment-in-kind interest |
57,164
|
|
89,671
|
|
|
| Accretion of discounts and premiums, net |
6,335
|
|
5,511
|
|
|
| Decrease to Subordinated Structured Notes cost, net |
0
|
|
0
|
|
|
| Repayments and sales of portfolio investments |
(443,442)
|
|
(701,471)
|
|
|
| Transfers within Level 3 |
31,203
|
|
10,706
|
|
|
| Transfers out of Level 3 |
0
|
|
(147,000)
|
|
|
| Transfers into Level 3 |
21,956
|
|
126,207
|
|
|
| Fair value, ending balance |
$ 4,215,364
|
|
$ 4,338,576
|
|
|
| Number of assets transferred out of Level 3 to Level 2 | investment |
3
|
|
2
|
|
|
| Number of assets transferred out of Level 2 to Level 3 | investment |
2
|
|
|
|
|
| Number of additional assets transferred out of Level 2 to Level 3 | investment |
2
|
|
|
|
|
| Second Lien Revolving Line of Credit |
|
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Fair value, beginning balance |
$ 0
|
|
$ 4,987
|
|
|
| Net realized (losses) gains on investments |
0
|
|
0
|
|
|
| Net change in unrealized (losses) gains |
0
|
|
160
|
|
|
| Net realized and unrealized (losses) gains |
0
|
|
160
|
|
|
| Purchases of portfolio investments |
5,229
|
|
(5,147)
|
|
|
| Payment-in-kind interest |
0
|
|
0
|
|
|
| Accretion of discounts and premiums, net |
0
|
|
0
|
|
|
| Decrease to Subordinated Structured Notes cost, net |
0
|
|
0
|
|
|
| Repayments and sales of portfolio investments |
0
|
|
0
|
|
|
| Transfers within Level 3 |
(3,375)
|
|
0
|
|
|
| Transfers out of Level 3 |
0
|
|
0
|
|
|
| Transfers into Level 3 |
0
|
|
0
|
|
|
| Fair value, ending balance |
$ 1,854
|
|
0
|
|
|
| Number of additional assets transferred out of Level 3 to Level 2 | investment |
1
|
|
|
|
|
| Number of additional assets transferred out of Level 2 to Level 3 | investment |
2
|
|
|
|
|
| Second Lien Debt |
|
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Fair value, beginning balance |
$ 726,372
|
|
1,038,882
|
|
|
| Net realized (losses) gains on investments |
(102,859)
|
|
(81,838)
|
|
|
| Net change in unrealized (losses) gains |
64,933
|
|
(20,233)
|
|
|
| Net realized and unrealized (losses) gains |
(37,926)
|
|
(102,071)
|
|
|
| Purchases of portfolio investments |
8,359
|
|
55,694
|
|
|
| Payment-in-kind interest |
5,790
|
|
2,187
|
|
|
| Accretion of discounts and premiums, net |
459
|
|
1,253
|
|
|
| Decrease to Subordinated Structured Notes cost, net |
0
|
|
0
|
|
|
| Repayments and sales of portfolio investments |
(66,969)
|
|
(227,569)
|
|
|
| Transfers within Level 3 |
(17,125)
|
|
1,189
|
|
|
| Transfers out of Level 3 |
(48,947)
|
|
(43,193)
|
|
|
| Transfers into Level 3 |
7,300
|
|
0
|
|
|
| Fair value, ending balance |
$ 577,313
|
|
$ 726,372
|
|
|
| Number of assets transferred out of Level 3 to Level 2 | investment |
1
|
|
2
|
|
|
| Number of additional assets transferred out of Level 3 to Level 2 | investment |
1
|
|
|
|
|
| Unsecured Debt |
|
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Fair value, beginning balance |
$ 5,403
|
|
$ 7,200
|
|
|
| Net realized (losses) gains on investments |
19
|
|
12
|
|
|
| Net change in unrealized (losses) gains |
(208)
|
|
(1,797)
|
|
|
| Net realized and unrealized (losses) gains |
(189)
|
|
(1,785)
|
|
|
| Purchases of portfolio investments |
0
|
|
0
|
|
|
| Payment-in-kind interest |
0
|
|
0
|
|
|
| Accretion of discounts and premiums, net |
0
|
|
0
|
|
|
| Decrease to Subordinated Structured Notes cost, net |
0
|
|
0
|
|
|
| Repayments and sales of portfolio investments |
(19)
|
|
(12)
|
|
|
| Transfers within Level 3 |
0
|
|
0
|
|
|
| Transfers out of Level 3 |
0
|
|
0
|
|
|
| Transfers into Level 3 |
0
|
|
0
|
|
|
| Fair value, ending balance |
5,195
|
|
5,403
|
|
|
| Subordinated Structured Notes |
|
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Fair value, beginning balance |
35,002
|
|
531,690
|
|
|
| Net realized (losses) gains on investments |
(5,484)
|
|
(432,592)
|
|
|
| Net change in unrealized (losses) gains |
3,526
|
|
89,170
|
|
|
| Net realized and unrealized (losses) gains |
(1,958)
|
|
(343,422)
|
|
|
| Purchases of portfolio investments |
0
|
|
0
|
|
|
| Payment-in-kind interest |
0
|
|
0
|
|
|
| Accretion of discounts and premiums, net |
0
|
|
0
|
|
|
| Decrease to Subordinated Structured Notes cost, net |
(29,611)
|
|
(77,660)
|
|
|
| Repayments and sales of portfolio investments |
(639)
|
|
(75,606)
|
|
|
| Transfers within Level 3 |
0
|
|
0
|
|
|
| Transfers out of Level 3 |
0
|
|
0
|
|
|
| Transfers into Level 3 |
0
|
|
0
|
|
|
| Fair value, ending balance |
2,794
|
|
35,002
|
|
|
| Distributions received, or entitled to be received, |
29,611
|
|
84,604
|
|
|
| Effective yield interest income recognized |
0
|
|
14,017
|
|
|
| Equity |
|
|
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
|
|
|
| Fair value, beginning balance |
1,404,527
|
|
1,479,473
|
|
|
| Net realized (losses) gains on investments |
(50,226)
|
|
4,361
|
|
|
| Net change in unrealized (losses) gains |
46,167
|
|
(219,225)
|
|
|
| Net realized and unrealized (losses) gains |
(4,059)
|
|
(214,864)
|
|
|
| Purchases of portfolio investments |
58,803
|
|
109,282
|
|
|
| Payment-in-kind interest |
10,011
|
|
0
|
|
|
| Accretion of discounts and premiums, net |
0
|
|
0
|
|
|
| Decrease to Subordinated Structured Notes cost, net |
0
|
|
0
|
|
|
| Repayments and sales of portfolio investments |
(5,355)
|
|
(6,224)
|
|
|
| Transfers within Level 3 |
2,500
|
|
36,860
|
|
|
| Transfers out of Level 3 |
0
|
|
0
|
|
|
| Transfers into Level 3 |
0
|
|
0
|
|
|
| Fair value, ending balance |
$ 1,466,427
|
|
$ 1,404,527
|
|
|
|
|