Intangible Assets

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

We have a coal supply agreement intangible asset which is subject to amortization based on units of production over the term of the lignite sales agreement which expires in 2032. The gross and net balances are set forth in the following table:

	Gross Carrying Amount		Accumulated Amortization and Impairment		Net Balance
Balance at December 31, 2025
Coal supply agreement	$	84,200	$	(79,475)	$	4,725
Balance at December 31, 2024
Coal supply agreement	$	84,200	$	(78,725)	$	5,475

Amortization expense for intangible assets was $0.8 million and $0.5 million in 2025 and 2024, respectively.