Annual report pursuant to Section 13 and 15(d)

Equity and Mezzanine Equity - Changes in Carrying Value of Series D Preferred (Details)

v3.20.4
Equity and Mezzanine Equity - Changes in Carrying Value of Series D Preferred (Details) - Series D Cumulative Convertible Preferred Stock - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Increase (Decrease) in Temporary Equity [Roll Forward]    
Series D Preferred, Beginning Balance $ 87,225 $ 76,955
Accretion of Preferred Stock discount 590 593
Undeclared dividends 9,581 9,677
Redemption of Preferred Stock (1,833)  
Series D Preferred, Ending Balance $ 95,563 $ 87,225