Financial Instruments - Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Increase (decrease) in fair value: | ||||
| Interest rate agreements | $ 0 | $ (1,678) | $ 0 | $ 18,041 |
| Recognition of gains in earnings due to settlements: | ||||
| Interest rate agreements | (4,780) | (3,982) | (9,586) | (7,140) |
| Total other comprehensive income (loss) from hedging, net of tax | $ (4,780) | $ (5,660) | $ (9,586) | $ 10,901 |