Issuances of Common Stock - Dividend Reinvestment and Stock Purchase Plan (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Dividend Reinvestment and Stock Purchase Plan | |||
| Gross proceeds | $ 9,109 | $ 8,437 | $ 9,114 |
| DRSPP | |||
| Dividend Reinvestment and Stock Purchase Plan | |||
| Dividend Reinvestment and Stock Purchase Plan, authorized shares (in shares) | 26,000,000 | ||
| Shares remaining for future issuance (in shares) | 11,503,379 | ||
| Common stock | DRSPP | |||
| Dividend Reinvestment and Stock Purchase Plan | |||
| Shares of common stock issued (in shares) | 149,289 | 117,522 | 116,268 |
| Gross proceeds | $ 9,100 | $ 8,400 | $ 9,100 |