Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Related Party Transaction [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 183,630	$ 62,524
Related Party | SNS | KBR, Inc.
Related Party Transaction [Line Items]
Equity ownership percentage	10.00%
KBR, Inc. | Related Party
Related Party Transaction [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 400	600
Accounts receivable	400		$ 300
KBR, Inc. | Related Party | SNS
Related Party Transaction [Line Items]
Cost of goods and service, excluding depreciation, depletion, and amortization	5,400	6,300
Accounts payable and accrued expenses	2,100		1,600
ASES | Related Party
Related Party Transaction [Line Items]
Revenue from contract with customer, excluding assessed tax	200	300
Accounts receivable	200		200
Aerodyne | Related Party | SNS
Related Party Transaction [Line Items]
Cost of goods and service, excluding depreciation, depletion, and amortization	500	700
Accounts payable	300		100
X Energy, LLC | Related Party
Related Party Transaction [Line Items]
Accounts payable	0		0
Management fee expense	0	300
IBX/PTX | Related Party
Related Party Transaction [Line Items]
Accounts payable	0		$ 26
Management fee expense	$ 0	$ 0