Equity (Dividends) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Dividends [Abstract]
Minimum percentage of taxable income excluding capital gains	90.00%
Percentage of taxable income (including net capital gains) to be distributed in order to qualify as REIT	100.00%
Operating loss carryforwards		$ 582,400
Common stock dividends	$ 12,333
Common stock dividends declared (in dollars per share)	$ 0.18
Common stock dividends paid (in dollars per share)	$ 0.18
Capital gains distribution percentage	100.00%	100.00%
Unrecaptured Section 1250 gain percentage	26.02%	27.90%
Long term capital gain percentage	73.98%	72.10%
Common Stock
Dividends [Abstract]
Capital gains distribution percentage	100.00%
Unrecaptured Section 1250 gain percentage	26.02%
Long term capital gain percentage	73.98%