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Equity - Equity Issuances (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Preferred Stock | Series B Preferred Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Number of shares sold (in shares) |  | 831,579 | 1,229,531 | 2,330,654
Weighted-average offering price per share |  | $ 24.64 | $ 24.52 | $ 24.68
Gross proceeds |  | $ 20,487 | $ 30,148 | $ 57,529
Net proceeds |  | $ 18,711 | $ 27,664 | $ 52,440
Preferred Stock | Series C Preferred Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Number of shares sold (in shares) | 289,494 |  | 420,196 |
Weighted-average offering price per share | $ 24.82 |  | $ 24.86 |
Gross proceeds | $ 7,184 |  | $ 10,444 |
Net proceeds | $ 6,586 |  | $ 9,559 |
Preferred stock, shares issued, pursuant to DRIP (in shares) | 34 |  | 34 |
ATM Program | Common Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Number of shares sold (in shares) | 526,016 | 78,008 | 979,945 | 148,559
Weighted-average offering price per share | $ 16.13 | $ 12.01 | $ 14.94 | $ 12.32
Gross proceeds | $ 8,483 | $ 937 | $ 14,638 | $ 1,830
Net proceeds | $ 8,398 | $ 923 | $ 14,491 | $ 1,802

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