v3.25.2
Leases - Schedule of Lease and Non-lease Components for all Lease Agreements (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Right-of-use assets—Finance leases    
Right-of-use assets $ 302,732 $ 302,732
Less: Accumulated provision for depreciation (286,492) (283,417)
Total finance lease assets $ 16,240 $ 19,315
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Right-of-use assets Right-of-use assets
Lease liabilities—Finance leases    
Obligations under finance leases $ 27,531 $ 33,173
Long-term debt and finance leases due within one year 10,989 10,413
Total finance lease liabilities $ 38,520 $ 43,586
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Long-term debt and finance leases due within one year Long-term debt and finance leases due within one year
Right-of-use assets—Operating leases    
Electric plant in service, net $ 6,736 $ 7,723
Total operating lease assets $ 6,736 $ 7,723
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] In service In service
Lease liabilities—Operating leases    
Capitalization—Other $ 4,804 $ 5,715
Other current liabilities 1,878 1,954
Total operating lease liabilities $ 6,682 $ 7,669
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other Other
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Other current liabilities Other current liabilities