Intangible Assets

6 Months Ended

Jun. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

3. Intangible Assets

Intangible assets, net, include Goodwill allocated to our Domestic Coke segment of $3.4 million at both June 30, 2025 and December 31, 2024, and other intangibles detailed in the table below, excluding fully amortized intangible assets.


		June 30, 2025						December 31, 2024
	Weighted - Average Remaining Amortization Years	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net

		(Dollars in millions)
Permits	17	31.7		7.9		23.8		31.7		7.3		24.4
Other	25	1.6		0.3		1.3		1.6		0.2		1.4
Total		$	33.3	$	8.2	$	25.1	$	33.3	$	7.5	$	25.8

Total amortization expense for intangible assets subject to amortization was $0.4 million and $0.5 million for the three months ended June 30, 2025 and 2024, respectively, and $0.7 million and $1.0 million for the six months ended June 30, 2025 and 2024, respectively.