Leases - Lease costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Leased Assets [Line Items]
Operating Lease Cost	$ 124,260	$ 87,376	$ 60,228
Variable lease cost	118,969	122,331	114,015
Short-term lease cost	3,872	3,804	4,385
Purchased Power Lease Contracts
Operating Leased Assets [Line Items]
Operating Lease Cost	105,762	68,883	42,190
Land, Property, and Other Equipment
Operating Leased Assets [Line Items]
Operating Lease Cost	18,498	18,493	18,038
Total lease cost	$ 247,101	$ 213,511	$ 178,628