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Balance Sheet Components Other Property and Investments-Net and Non-current Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]    
Operating Lease, Right-of-Use Asset $ 70,442 $ 0
Finance Lease, Right-of-Use Asset 52,800 0
Non-utility property 28,438 31,355
Equity investments 36,921 29,257
Investment in affiliated trust 11,547 11,547
Notes receivable 11,376 11,073
Deferred compensation assets 8,557 8,400
Other 20,549 23,065
Investments and Other Noncurrent Assets $ 240,630 $ 114,697