Balance Sheet Components - Other Property and Investments-Net and Other Non-current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract]
Equity investments	$ 156,156	$ 153,350
Operating lease ROU assets	$ 67,407	$ 67,585
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total	Total
Finance lease ROU assets	$ 35,504	$ 36,414
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total	Total
Non-utility property	$ 33,736	$ 33,813
Notes receivable	15,432	15,287
Long-term prepaid license fees	18,447	19,448
Pension asset	35,853	32,997
Investment in affiliated trust	11,547	11,547
Deferred compensation assets	8,484	7,794
Other	16,131	15,750
Total	$ 398,697	$ 393,985