Fair Value of Financial Instruments - Fair Value of Commodity Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Derivative assets (liabilities)
Net derivative asset	$ 17,325	$ 19,011
Prepaid expenses and other current assets
Derivative assets (liabilities)
Net derivative asset	52,200
Accrued expenses and other payables
Derivative assets (liabilities)
Net derivative asset	34,700
Commodity contracts
Assets:
Derivative assets	58,838	88,681
Netting of counterparty contracts, assets	(4,798)	(6,670)
Net cash collateral provided (held)	630	(47,686)
Derivatives	54,670	34,325
Liabilities:
Derivative liabilities	(44,862)	(21,870)
Netting of counterparty contracts, liabilities	4,798	6,670
Net cash collateral provided (held)	2,719	(114)
Derivatives	(37,345)	(15,314)
Derivative assets (liabilities)
Net derivative asset	17,325	19,011
Commodity contracts | Prepaid expenses and other current assets
Derivative assets (liabilities)
Net derivative asset	54,670	33,875
Commodity contracts | Other noncurrent assets
Derivative assets (liabilities)
Net derivative asset	0	450
Commodity contracts | Accrued expenses and other payables
Derivative assets (liabilities)
Net derivative asset	(36,679)	(14,752)
Commodity contracts | Other noncurrent liabilities
Derivative assets (liabilities)
Net derivative asset	(666)	(562)
Level 1 | Commodity contracts
Assets:
Derivative assets	4,798	63,553
Liabilities:
Derivative liabilities	(7,517)	(6,043)
Level 2 | Commodity contracts
Assets:
Derivative assets	54,040	25,128
Liabilities:
Derivative liabilities	$ (37,345)	$ (15,827)