Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Real Estate Owned, Accumulated Depreciation	$ 1,369,790,000	$ 1,302,640,000
Common Shares, par value	$ 0.01	$ 0.01
Common Shares, shares authorized	125,000,000	100,000,000
Preferred Shares, par value	$ 0.01	$ 0.01
Preferred Shares, shares authorized	25,000,000	25,000,000
Treasury Stock, Common, Shares	7,630,877	7,520,227
Series C Preferred Shares [Member]
Preferred Shares, shares issued	5,392,916
Preferred Shares, liquidation preference	$ 134,822,900	$ 134,822,900
Series E Preferred Shares [Member]
Preferred Shares, shares issued	3,445,980	3,447,381
Preferred Shares, liquidation preference	$ 86,149,500	$ 86,149,500
Series G Preferred Stock [Member]
Preferred Shares, shares issued	6,000,000	6,000,000
Preferred Shares, liquidation preference	$ 150,000,000	$ 150,000,000