Variable Interest Entities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Variable Interest Entity [Line Items]
Total assets	$ 1,717,947	$ 757,154
Total liabilities	986,792	553,452
SNS
Variable Interest Entity [Line Items]
Total assets	11,600	7,800
Total liabilities	$ 8,600	$ 5,500
LLC & KBR
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	10.00%
KBR, Inc.
Variable Interest Entity [Line Items]
Variable interest entity, profits interest, percent	53.00%
SNS
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	90.00%
Variable interest entity, profits interest, percent	47.00%