Fair Value Measurements - Schedule of Changes in Investments Measured at Fair Value Using Level 3 Inputs (Details) - USD ($)
$ in Thousands |
6 Months Ended |
Mar. 31, 2026 |
Mar. 31, 2025 |
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Fair value, beginning of period |
$ 390,128
|
$ 295,825
|
| Fundings of (proceeds from) revolving loans, net |
1,395
|
654
|
| Fundings of investments |
27,098
|
57,715
|
| PIK interest and non-cash dividends |
1,109
|
991
|
| Proceeds from non-cash dividends |
|
(84)
|
| Proceeds from principal payments and sales of portfolio investments |
(17,470)
|
(14,701)
|
| Fair value, end of period |
397,083
|
341,527
|
| Debt Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Fair value, beginning of period |
383,033
|
291,377
|
| Fundings of (proceeds from) revolving loans, net |
1,395
|
654
|
| Fundings of investments |
26,574
|
56,385
|
| PIK interest and non-cash dividends |
1,080
|
934
|
| Proceeds from non-cash dividends |
|
0
|
| Proceeds from principal payments and sales of portfolio investments |
(16,862)
|
(14,536)
|
| Fair value, end of period |
390,005
|
335,580
|
| Equity Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Fair value, beginning of period |
7,095
|
4,448
|
| Fundings of (proceeds from) revolving loans, net |
0
|
0
|
| Fundings of investments |
524
|
1,330
|
| PIK interest and non-cash dividends |
29
|
57
|
| Proceeds from non-cash dividends |
|
(84)
|
| Proceeds from principal payments and sales of portfolio investments |
(608)
|
(165)
|
| Fair value, end of period |
$ 7,078
|
$ 5,947
|
| Net change in unrealized appreciation (depreciation) on investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Net change in unrealized appreciation (depreciation) on investment transactions
|
Net change in unrealized appreciation (depreciation) on investment transactions
|
| Accretion of discounts and amortization of premiums |
$ (5,722)
|
$ 661
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Net change in unrealized appreciation (depreciation) on investment transactions
|
Net change in unrealized appreciation (depreciation) on investment transactions
|
| Net change in unrealized appreciation (depreciation) on investments | Debt Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Accretion of discounts and amortization of premiums |
$ (5,760)
|
$ 300
|
| Net change in unrealized appreciation (depreciation) on investments | Equity Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Accretion of discounts and amortization of premiums |
$ 38
|
$ 361
|
| Net translation of investments in foreign currencies |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Translation of assets and liabilities in foreign currencies
|
Translation of assets and liabilities in foreign currencies
|
| Accretion of discounts and amortization of premiums |
$ (77)
|
$ (101)
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Translation of assets and liabilities in foreign currencies
|
Translation of assets and liabilities in foreign currencies
|
| Net translation of investments in foreign currencies | Debt Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Accretion of discounts and amortization of premiums |
$ (77)
|
$ (101)
|
| Net translation of investments in foreign currencies | Equity Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Accretion of discounts and amortization of premiums |
$ 0
|
$ 0
|
| Realized gain (loss) on translation of investments in foreign currencies |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Foreign currency transactions
|
Foreign currency transactions
|
| Accretion of discounts and amortization of premiums |
$ 7
|
$ (1)
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Foreign currency transactions
|
Foreign currency transactions
|
| Realized gain (loss) on translation of investments in foreign currencies | Debt Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Accretion of discounts and amortization of premiums |
$ 7
|
$ (1)
|
| Realized gain (loss) on translation of investments in foreign currencies | Equity Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Accretion of discounts and amortization of premiums |
$ 0
|
$ 0
|
| Accretion of discounts and amortization of premiums |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Gross Investment Income, Operating
|
Gross Investment Income, Operating
|
| Accretion of discounts and amortization of premiums |
$ 615
|
$ 568
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Gross Investment Income, Operating
|
Gross Investment Income, Operating
|
| Accretion of discounts and amortization of premiums | Debt Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Accretion of discounts and amortization of premiums |
$ 615
|
$ 568
|
| Accretion of discounts and amortization of premiums | Equity Investments |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Accretion of discounts and amortization of premiums |
$ 0
|
$ 0
|