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Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Sep. 30, 2020 | Dec. 31, 2019
Common stock, shares authorized |  |  | 100,000,000 | 60,000,000
At-The Market Shelf Registration, Equity Offering Sales Agreement, Aggregate Sales Price |  |  | $ 500,000 |
Stock Issued During Period, Shares, New Issues |  | 618,654 | 79,155 |
Stock Issued During Period, Value, New Issues | $ 47,948 | $ 47,854 |  |
Shares Issued, Price Per Share |  |  | $ 65.35 |
Authorized Shares, Prior to Charter Amendment [Member] |  |  |  |
Common stock, shares authorized |  |  | 60,000,000 |
Authorized Shares, After Charter Amendment [Member] |  |  |  |
Common stock, shares authorized |  |  | 100,000,000 |

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