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Balance Sheet Components Other Property and Investments-Net and Non-current Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]    
Operating Lease, Right-of-Use Asset $ 70,140 $ 0
Finance Lease, Right-of-Use Asset 51,890 0
Non-utility property 27,151 31,355
Equity investments 41,609 29,257
Investment in affiliated trust 11,547 11,547
Notes receivable 15,751 11,073
Deferred compensation assets 8,852 8,400
Other 21,943 23,065
Investments and Other Noncurrent Assets $ 248,883 $ 114,697