Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Leased Assets [Line Items]
Operating Lease Cost - Purchased Power Lease Contracts	$ 4,600	$ 4,572
Variable lease, cost	16,721	18,695
Short-term lease cost	1,402	1,302
Purchased Power Lease Contracts
Operating Leased Assets [Line Items]
Operating Lease Cost - Purchased Power Lease Contracts	0	0
Land, Property and Equipment Leases
Operating Leased Assets [Line Items]
Operating Lease Cost - Purchased Power Lease Contracts	4,600	4,572
Total lease cost	$ 22,723	$ 24,569