Commitments (Tables)

12 Months Ended

Dec. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of estimated commitments

As of December 31, 2021, our estimated commitments are as follows:

	(dollars in thousands)
	Coal		Nuclear Fuel		Gas Transportation		Maintenance Agreements		Asset Retirement Obligations		Finance and Operating Leases
2022	$	29,878	$	67,440	$	64,048	$	14,881	$	22,253	$	15,878
2023	9,555		24,540		63,062		3,320		21,105		15,657
2024	—		35,070		58,232		30,307		34,672		15,183
2025	—		26,670		56,549		43,120		37,581		15,021
2026	—		22,740		56,549		16,088		40,140		15,021
Thereafter	—		63,570		749,793		157,820		3,505,973		26,573