CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Real estate owned:
Real estate under development accumulated depreciation	$ 3,674	$ 3,854
Real estate held for disposition accumulated depreciation	$ 77,872	$ 0
Equity:
Preferred stock, no par value	$ 0.00	$ 0.00
Preferred stock, shares authorized	50,000,000	50,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares issued	268,390,557	267,822,069
Common stock, shares outstanding	268,390,557	267,822,069
8.00% Series E Cumulative Convertible Preferred Stock
Equity:
Preferred stock, no par value	$ 0.00	$ 0.00
Preferred stock, dividend rate percentage	8.00%	8.00%
Preferred stock, shares issued	2,780,994	2,780,994
Preferred stock, shares outstanding	2,780,994	2,780,994
Series F
Equity:
Preferred stock, no par value	$ 0.00	$ 0.00
Preferred stock, shares issued	15,804,393	15,852,721
Preferred stock, shares outstanding	15,804,393	15,852,721