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Leases - Maturity of Operating Lease Liabilities (Details)
$ in Thousands
Mar. 31, 2023
USD ($)
Lessee, Lease, Description [Line Items]  
2023 (remaining nine months of 2023) $ 118,133
2024 117,413
2025 131,504
2026 143,114
2027 167,122
2028 168,862
Thereafter 848,164
Total lease commitments 1,694,312
Less imputed interest 388,598
Estimated lease and nonlease payments 1,305,714
Purchased Power Lease Contracts  
Lessee, Lease, Description [Line Items]  
2023 (remaining nine months of 2023) 106,152
2024 104,315
2025 121,082
2026 134,806
2027 160,727
2028 164,524
Thereafter 779,792
Total lease commitments 1,571,398
Less imputed interest 342,694
Estimated lease and nonlease payments 1,228,704
Land, Property and Equipment Leases  
Lessee, Lease, Description [Line Items]  
2023 (remaining nine months of 2023) 11,981
2024 13,098
2025 10,422
2026 8,308
2027 6,395
2028 4,338
Thereafter 68,372
Total lease commitments 122,914
Less imputed interest 45,904
Estimated lease and nonlease payments $ 77,010