Income Taxes (Schedule of Per Share Distributions Reported to Shareholders) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Ordinary Income	$ 2.99	$ 2.38	$ 0.00
Long-term capital gain	0.09	0.41	5.02
Unrecaptured Sec. 1250 gain	0.00	0.21	2.23
Total common share distributions	$ 3.08	$ 3.00	$ 7.25