Share Data and Net Assets - Schedule of Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Jun. 28, 2024 |
Mar. 29, 2024 |
Dec. 29, 2023 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Investment Company, Changes in Net Assets [Line Items] | ||||||||||||||
| Amount per share (in dollars per share) | $ 0.42 | $ 0.55 | $ 1.44 | $ 1.72 | ||||||||||
| Cash Distribution | $ 114,100 | $ 133,100 | ||||||||||||
| DRIP Shares Issued (in shares) | 639,964,000 | 295,484,000 | ||||||||||||
| DRIP Shares Value | $ 3,751 | $ 4,289 | $ 1,455 | $ 1,873 | $ 1,853 | $ 1,936 | $ 9,495 | $ 5,662 | ||||||
| Quarterly | ||||||||||||||
| Investment Company, Changes in Net Assets [Line Items] | ||||||||||||||
| Amount per share (in dollars per share) | $ 0.40 | $ 0.40 | $ 0.55 | $ 0.55 | $ 0.55 | $ 0.55 | ||||||||
| Cash Distribution | $ 31,600 | $ 31,500 | $ 43,800 | $ 43,300 | $ 42,800 | $ 41,700 | ||||||||
| DRIP Shares Issued (in shares) | 256,343,000 | 234,752,000 | 94,970,000 | 100,029,000 | 96,850,000 | 87,472,000 | ||||||||
| DRIP Shares Value | $ 3,600 | $ 3,700 | $ 1,500 | $ 1,900 | $ 1,900 | $ 1,700 | ||||||||
| Supplemental | ||||||||||||||
| Investment Company, Changes in Net Assets [Line Items] | ||||||||||||||
| Amount per share (in dollars per share) | $ 0.02 | $ 0.07 | ||||||||||||
| Cash Distribution | $ 1,600 | $ 5,600 | ||||||||||||
| DRIP Shares Issued (in shares) | 12,817,000 | 41,082,000 | ||||||||||||
| DRIP Shares Value | $ 200 | $ 600 | ||||||||||||
| Special | ||||||||||||||
| Investment Company, Changes in Net Assets [Line Items] | ||||||||||||||
| Amount per share (in dollars per share) | $ 0.07 | |||||||||||||
| Cash Distribution | $ 5,300 | |||||||||||||
| DRIP Shares Issued (in shares) | 11,133,000 | |||||||||||||
| DRIP Shares Value | $ 200 | |||||||||||||