Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Weighted average unvested shares outstanding	300,000	200,000	300,000	200,000
5.417% Series 1 Cumulative Convertible Preferred Shares, (stated at liquidation preference $25 per share), 399,896 shares issued and outstanding
Preferred shares, percentage	5.417%	5.417%	5.417%	5.417%	5.417%
Stock Options
Anti-dilutive issuable shares	682	682	682	682
Forward Sales Contracts
Anti-dilutive issuable shares	900,000		1,700,000
Performance Based Unvested Shares
Anti-dilutive issuable shares	10,441		10,441