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Balance Sheet Components Other Property and Investments-Net and Non-current Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]    
Operating Lease, Right-of-Use Asset $ 65,303 $ 69,746
Finance Lease, Right-of-Use Asset 50,069 50,980
Non-utility property 26,511 27,159
Equity investments 51,467 51,258
Investment in affiliated trust 11,547 11,547
Notes receivable 14,970 14,060
Deferred compensation assets 8,670 8,948
Other 25,614 23,394
Investments and Other Noncurrent Assets $ 254,151 $ 257,092