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Capital Stock (Tables) | 6 Months Ended
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Jun. 30, 2022
Capital Stock |
Schedule of declared and paid cash dividends | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Series A Preferred Stock | ​ | Series B Depositary Share | ​ | ​
​ | ​ | Cash Dividend Declared | ​ | Cash Dividend Declared | ​ | ​
Dividend Declaration Date |  | ($ per share) |  | ($ per share) |  | Dividend Payment Date
October 20, 2021 | ​ | $ | 0.53906 | ​ | $ | 0.52344 | ​ | January 18, 2022
March 17, 2022 | ​ | $ | 0.53906 | ​ | $ | 0.52344 | ​ | April 15, 2022
May 18, 2022 | ​ | $ | 0.53906 | ​ | $ | 0.52344 | ​ | July 15, 2022

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