Derivative Financial Instruments - Commodity Contracts, etc. (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Derivative Financial Instruments
Total asset derivatives	$ 167,156	$ 69,225
Total liability derivatives	(202,616)	(53,472)
Exchange-traded derivative contracts \| Broker margin deposits
Derivative Financial Instruments
Total asset derivatives	156,196	52,158
Total liability derivatives	(158,721)	(48,932)
Forward derivative contracts \| Derivative assets
Derivative Financial Instruments
Total asset derivatives	10,960	17,067
Forward derivative contracts \| Derivative liabilities
Derivative Financial Instruments
Total liability derivatives	(43,895)	(4,540)
Derivatives Designated as Hedging Instruments
Derivative Financial Instruments
Total asset derivatives	287	2,408
Derivatives Designated as Hedging Instruments \| Exchange-traded derivative contracts \| Broker margin deposits
Derivative Financial Instruments
Total asset derivatives	287	2,408
Derivatives Not Designated as Hedging Instruments
Derivative Financial Instruments
Total asset derivatives	166,869	66,817
Total liability derivatives	(202,616)	(53,472)
Derivatives Not Designated as Hedging Instruments \| Exchange-traded derivative contracts \| Broker margin deposits
Derivative Financial Instruments
Total asset derivatives	155,909	49,750
Total liability derivatives	(158,721)	(48,932)
Derivatives Not Designated as Hedging Instruments \| Forward derivative contracts \| Derivative assets
Derivative Financial Instruments
Total asset derivatives	10,960	17,067
Derivatives Not Designated as Hedging Instruments \| Forward derivative contracts \| Derivative liabilities
Derivative Financial Instruments
Total liability derivatives	$ (43,895)	$ (4,540)