Portfolio Investments - Narrative (Details)
|
6 Months Ended |
12 Months Ended |
|
|
|
|
|
Sep. 30, 2021
USD ($)
|
Sep. 30, 2023
USD ($)
member
borrower
|
Sep. 30, 2022
USD ($)
borrower
|
Sep. 30, 2021
USD ($)
|
Aug. 15, 2023 |
May 18, 2021 |
Sep. 30, 2020
USD ($)
|
Feb. 25, 2020 |
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investment owned, percent of net assets |
|
190.82%
|
200.24%
|
|
|
|
|
|
| Investments at fair value |
|
$ 2,892,420,000
|
$ 2,494,111,000
|
|
|
|
|
|
| Number of borrowers | borrower |
|
143
|
149
|
|
|
|
|
|
| Money market funds, percent of net assets |
|
9.60%
|
2.10%
|
|
|
|
|
|
| Cash, cash equivalents and restricted cash |
$ 31,635,000
|
$ 145,539,000
|
$ 26,364,000
|
$ 31,635,000
|
|
|
$ 39,096,000
|
|
| Restricted cash |
2,301,000
|
9,089,000
|
2,836,000
|
2,301,000
|
|
|
|
|
| Net realized gains (losses) |
|
(33,155,000)
|
17,179,000
|
26,420,000
|
|
|
|
|
| Net unrealized appreciation (depreciation) |
|
(28,555,000)
|
(136,248,000)
|
114,519,000
|
|
|
|
|
| Credit facilities payable |
|
710,000,000
|
700,000,000
|
|
|
|
|
|
| Assets |
|
3,217,839,000
|
2,646,313,000
|
|
|
|
|
|
| Unfunded commitments |
|
232,740,000
|
224,239,000
|
|
|
|
|
|
| Investment owned, at cost |
|
3,044,119,000
|
2,617,754,000
|
|
|
|
|
|
| SLF JV I, LLC |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
141,500,000
|
117,000,000
|
|
|
|
|
|
| OCSI Glick JV LLC |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
$ 50,000,000
|
$ 50,300,000
|
|
|
|
|
|
| Investment Owned, At Fair Value |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investment owned, percent of net assets |
|
190.82%
|
200.24%
|
|
|
|
|
|
| Investments at fair value |
|
$ 2,892,420,000
|
$ 2,494,111,000
|
|
|
|
|
|
| Investment Owned, At Fair Value | Investment Type Concentration Risk |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
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| Concentration risk |
|
100.00%
|
100.00%
|
|
|
|
|
|
| Senior secured debt |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investment owned, percent of net assets |
|
165.01%
|
173.93%
|
|
|
|
|
|
| Investments at fair value |
|
$ 2,501,385,000
|
$ 2,166,409,000
|
|
|
|
|
|
| Investment owned, at cost |
|
$ 2,594,640,000
|
$ 2,227,245,000
|
|
|
|
|
|
| Senior secured debt | Investment Owned, At Fair Value | Investment Type Concentration Risk |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Concentration risk |
|
86.47%
|
86.86%
|
|
|
|
|
|
| Subordinated debt securities, including JV debt instruments |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
$ 218,390,000
|
$ 203,453,000
|
|
|
|
|
|
| Subordinated debt securities, including JV debt instruments | Investment Owned, At Fair Value | Investment Type Concentration Risk |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Concentration risk |
|
7.50%
|
8.10%
|
|
|
|
|
|
| SLF JV I |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
$ 141,500,000
|
$ 117,000,000
|
|
|
|
|
|
| SLF JV I Notes |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
112,700,000
|
96,300,000
|
|
|
|
|
|
| Investment owned, at cost |
|
112,700,000
|
96,300,000
|
|
|
|
|
|
| Interest income |
|
$ 12,700,000
|
8,000,000
|
7,400,000
|
|
|
|
|
| Investment, basis spread, variable rate |
|
7.00%
|
|
|
|
|
|
|
| Investment, interest rate, floor |
|
1.00%
|
|
|
|
|
|
|
| SLF JV I, LLC |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
$ 28,900,000
|
20,700,000
|
|
|
|
|
|
| Investment owned, at cost |
|
54,800,000
|
49,300,000
|
|
|
|
|
|
| Dividend income |
|
4,200,000
|
2,900,000
|
900,000
|
|
|
|
|
| OCSI Glick JV LLC |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
50,000,000
|
50,300,000
|
|
|
|
|
|
| Investment owned, at cost |
|
50,300,000
|
50,200,000
|
|
|
|
|
|
| Glick JV Notes |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Interest income |
2,400,000
|
$ 6,700,000
|
4,700,000
|
|
|
|
|
|
| Investment, basis spread, variable rate |
|
4.50%
|
|
|
|
|
|
|
| 2025 Notes |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Interest rate, percentage |
|
3.50%
|
|
|
|
|
|
3.50%
|
| 2027 Notes |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Interest rate, percentage |
|
2.70%
|
|
|
|
2.70%
|
|
|
| 2029 Notes |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Interest rate, percentage |
|
7.10%
|
|
|
7.10%
|
|
|
|
| The JVs |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Money market funds, percent of net assets |
|
9.60%
|
|
|
|
|
|
|
| Cash, cash equivalents and restricted cash |
|
$ 145,500,000
|
|
|
|
|
|
|
| Restricted cash |
|
9,100,000
|
|
|
|
|
|
|
| SLF JV I |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
$ 322,179,000
|
$ 359,625,000
|
|
|
|
|
|
| Number of borrowers | borrower |
|
48
|
60
|
|
|
|
|
|
| Restricted cash |
|
$ 2,987,000
|
$ 5,642,000
|
|
|
|
|
|
| Number of board of directors | member |
|
4
|
|
|
|
|
|
|
| Number of board of directors selected by company | member |
|
2
|
|
|
|
|
|
|
| Number of board of directors selected by counterparty | member |
|
2
|
|
|
|
|
|
|
| Number of investment committee members selected by company | member |
|
1
|
|
|
|
|
|
|
| Number of investment committee members selected by counterparty | member |
|
1
|
|
|
|
|
|
|
| Investment owned, ownership percentage |
|
87.50%
|
87.50%
|
|
|
|
|
|
| Credit facilities payable |
|
$ 149,000,000
|
$ 230,000,000
|
|
|
|
|
|
| Assets |
|
376,104,000
|
385,227,000
|
|
|
|
|
|
| Financial support funded by company and counterparty |
|
190,500,000
|
165,500,000
|
|
|
|
|
|
| Financial support funded by company for investee |
|
166,700,000
|
144,800,000
|
|
|
|
|
|
| Unfunded commitments |
|
13,100,000
|
35,000,000
|
|
|
|
|
|
| Investment owned, at cost |
|
331,808,000
|
382,673,000
|
|
|
|
|
|
| Interest income |
|
38,984,000
|
24,014,000
|
20,018,000
|
|
|
|
|
| Investments sold |
|
31,800,000
|
9,700,000
|
48,000,000
|
|
|
|
|
| Proceeds from sale of investments |
|
30,600,000
|
9,700,000
|
47,200,000
|
|
|
|
|
| Gain (loss) on sale of investments |
|
(200,000)
|
500,000
|
$ 2,500,000
|
|
|
|
|
| SLF JV I | SLF JV I Notes |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Unfunded commitments |
|
9,800,000
|
26,200,000
|
|
|
|
|
|
| Financial support funded during the period |
|
16,400,000
|
|
|
|
|
|
|
| SLF JV I | SLF JV I, LLC |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Unfunded commitments |
|
3,300,000
|
8,800,000
|
|
|
|
|
|
| Financial support funded during the period |
|
5,500,000
|
|
|
|
|
|
|
| SLF JV I | SLF JV I Facility | Revolving Credit Facility | Line of Credit |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Borrowing capacity |
|
270,000,000
|
$ 270,000,000
|
|
|
|
|
|
| Credit facilities payable |
|
$ 149,000,000
|
|
|
|
|
|
|
| SLF JV I | SLF JV I Facility | Revolving Credit Facility | Line of Credit | Until November 3, 2023 | Secured Overnight Financing Rate |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Debt instrument, basis spread, variable rate |
|
2.00%
|
|
|
|
|
|
|
| SLF JV I | Kemper |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investment owned, ownership percentage |
|
12.50%
|
12.50%
|
|
|
|
|
|
| OCSI Glick JV LLC |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
$ 123,343,000
|
$ 133,144,000
|
|
|
|
|
|
| Number of borrowers | borrower |
|
38
|
43
|
|
|
|
|
|
| Restricted cash |
|
$ 184,000
|
$ 1,788,000
|
|
|
|
|
|
| Number of board of directors | member |
|
4
|
|
|
|
|
|
|
| Number of board of directors selected by company | member |
|
2
|
|
|
|
|
|
|
| Number of board of directors selected by counterparty | member |
|
2
|
|
|
|
|
|
|
| Number of investment committee members selected by company | member |
|
1
|
|
|
|
|
|
|
| Number of investment committee members selected by counterparty | member |
|
1
|
|
|
|
|
|
|
| Credit facilities payable |
|
$ 53,000,000
|
82,082,000
|
|
|
|
|
|
| Assets |
|
141,167,000
|
146,808,000
|
|
|
|
|
|
| Financial support funded by company and counterparty |
|
84,000,000
|
84,000,000
|
|
|
|
|
|
| Financial support funded by company for investee |
|
73,500,000
|
73,500,000
|
|
|
|
|
|
| Investment owned, at cost |
|
127,788,000
|
140,083,000
|
|
|
|
|
|
| Interest income |
$ 4,643,000
|
14,043,000
|
9,703,000
|
|
|
|
|
|
| Investments sold |
|
6,500,000
|
|
|
|
|
|
|
| Proceeds from sale of investments |
|
6,300,000
|
|
|
|
|
|
|
| Financial commitment to investee by company and counterparty, aggregate amount |
|
100,000,000
|
100,000,000
|
|
|
|
|
|
| Financial commitment to investee, aggregate amount |
|
87,500,000
|
87,500,000
|
|
|
|
|
|
| Financial commitment to investee by counterparty, aggregate amount |
|
12,500,000
|
$ 12,500,000
|
|
|
|
|
|
| OCSI Glick JV LLC | Glick JV LLC |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
$ 50,000,000
|
|
|
|
|
|
|
| Investment owned, ownership percentage |
|
87.50%
|
12.50%
|
|
|
|
|
|
| Unfunded commitments |
|
$ 1,600,000
|
$ 1,600,000
|
|
|
|
|
|
| Investment owned, at cost |
|
50,000,000
|
|
|
|
|
|
|
| Financial commitment to investee, aggregate amount |
|
$ 8,700,000
|
8,700,000
|
|
|
|
|
|
| OCSI Glick JV LLC | Glick JV Notes |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Investments at fair value |
|
|
$ 50,300,000
|
|
|
|
|
|
| Investment owned, ownership percentage |
|
87.50%
|
12.50%
|
|
|
|
|
|
| Unfunded commitments |
|
$ 12,400,000
|
$ 12,400,000
|
|
|
|
|
|
| Investment owned, at cost |
|
|
50,300,000
|
|
|
|
|
|
| Financial commitment to investee, aggregate amount |
|
78,800,000
|
$ 78,800,000
|
|
|
|
|
|
| OCSI Glick JV LLC | Glick JV Facility | Revolving Credit Facility | Line of Credit |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Borrowing capacity |
|
80,000,000
|
|
|
|
|
|
|
| Credit facilities payable |
|
$ 53,000,000
|
|
|
|
|
|
|
| OCSI Glick JV LLC | Glick JV Facility | Revolving Credit Facility | Line of Credit | Until November 3, 2023 | Secured Overnight Financing Rate |
|
|
|
|
|
|
|
|
| Investment Company, Nonconsolidated Subsidiary [Line Items] |
|
|
|
|
|
|
|
|
| Debt instrument, basis spread, variable rate |
|
2.00%
|
|
|
|
|
|
|