Commitments and Contingencies - DOE Loan Guarantee (Details) $ in Thousands		3 Months Ended
	Jan. 16, 2025 USD ($) facility	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Commitments and Contingencies
Cash paid for closing fees related to loan guarantee		$ 12,817
Prepaid expenses, tax credits, and other current assets		112,068	$ 139,845
Other assets		24,755	$ 13,933
DOE Loan Guarantee
Commitments and Contingencies
Loan guarantee	$ 1,660,000
Number of hydrogen production facilities | facility	6
Cash paid for closing fees related to loan guarantee		15,200
Amortization expense attributable to debt closing fees		$ 600
Amount of closing fees capitalized	$ 14,600
Prepaid expenses, tax credits, and other current assets	2,900
Other assets	$ 11,700