Balance Sheet Components - Other Property and Investments-Net and Other Non-current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Balance Sheet Related Disclosures [Abstract]
Equity investments	$ 154,873	$ 147,809
Operating lease ROU assets	$ 68,087	$ 68,238
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total	Total
Finance lease ROU assets	$ 37,324	$ 40,056
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total	Total
Non-utility property	$ 30,909	$ 25,401
Notes receivable	18,234	17,954
Long-term prepaid license fees	16,293	17,936
Pension asset	22,268	13,382
Investment in affiliated trust	11,547	11,547
Deferred compensation assets	7,763	7,541
Other	22,919	15,221
Total	$ 390,217	$ 365,085