Equity (Preferred Stock Dividends) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Series D Preferred Stock      
Class of Stock [Line Items]      
Series D Cumulative Preferred Stock $ 3,300,000 $ 3,300,000 $ 3,300,000