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Balance Sheet Components - Other Property and Investments-Net and Other Non-current Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Balance Sheet Related Disclosures [Abstract] |  |
Operating lease ROU assets | $ 71,891 | $ 69,746
Finance lease ROU assets | 47,338 | 50,980
Non-utility property | 19,508 | 27,159
Equity investments | 59,318 | 51,258
Investment in affiliated trust | 11,547 | 11,547
Notes receivable | 14,454 | 14,060
Deferred compensation assets | 9,174 | 8,948
Assets held for sale | 3,462 |
Other | 26,947 | 23,394
Total | $ 263,639 | $ 257,092

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- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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