Fair Value of Financial Instruments - Gains (Losses) From Derivatives (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Derivative contract information | |||
| Net adjustments to fair value of derivatives | $ (42,049) | $ (4,909) | $ (12,321) |
| Commodity contracts | |||
| Derivative contract information | |||
| Net adjustments to fair value of derivatives | (43,341) | (4,482) | (12,836) |
| Interest rate swaps | |||
| Derivative contract information | |||
| Net adjustments to fair value of derivatives | $ 1,292 | $ (427) | $ 515 |