Dividends and Distributions - Distribution Type (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common Shares
Ordinary income	83.00%	66.00%	85.00%
Capital gains	0.00%	0.00%	0.00%
Return of capital	17.00%	34.00%	15.00%
Total	100.00%	100.00%	100.00%
Preferred Shares
Ordinary income		100.00%	100.00%
Capital gains		0.00%	0.00%
Return of capital		0.00%	0.00%
Total		100.00%	100.00%