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Senior Notes (Schedule Of Corporate Debt Principal Maturities) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Senior notes, net | $ 1,412,005 | $ 1,017,010
Non Recourse Debt [Member] |  |
Debt Instrument [Line Items] |  |
2020 | 300,000 |
2024 | 500,000 |
Thereafter | 625,000 |
Senior notes, net | $ 1,425,000 |

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