Income Taxes (Summary of Distributions Paid) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Common Shares, Ordinary income, Amount
Common Shares, Capital gain, Amount
Common Shares, Return of capital, Amount	0.585000	0.975000
Common Shares, Total, Amount	$ 0.585000	$ 0.975000
Common Shares, Ordinary income, Percent
Common Shares, Capital gain, Percent
Common Shares, Return of capital, Percent	100.00%	100.00%
Common Shares, Total, Percent	100.00%	100.00%
Preferred Shares, Ordinary income, Amount
Preferred Shares, Capital gain, Amount
Preferred Shares, Return of capital, Amount	0.468750	0.625000
Preferred Shares, Total, Amount	$ 0.468750	$ 0.625000
Preferred Shares, Ordinary income, Percent
Preferred Shares, Capital gain, Percent
Preferred Shares, Return of capital, Percent	100.00%	100.00%
Preferred Shares, Total, Percent	100.00%	100.00%