Leases - Lease costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Leased Assets [Line Items]
Operating Lease Cost	$ 122,062	$ 124,260	$ 87,376
Variable lease cost	122,040	118,969	122,331
Short-term lease cost	9,928	3,872	3,804
Purchased Power Lease Contracts
Operating Leased Assets [Line Items]
Operating Lease Cost	104,001	105,762	68,883
Land, Property & Equipment Leases
Operating Leased Assets [Line Items]
Operating Lease Cost	18,061	18,498	18,493
Total lease cost	$ 254,030	$ 247,101	$ 213,511