Income Taxes - Income Tax Treatment for Dividends (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Amount
Ordinary income (in dollars per share)	$ 0.2689	$ 0.7141	$ 0.4425
Capital gain (in dollars per share)	0	0.0359	0
Unrecaptured Section 1250 gain (in dollars per share)	0	0	0.0831
Return of capital (in dollars per share)	0.4811	0	0.1119
Distributions paid per common share (in dollars per share)	$ 0.75	$ 0.75	$ 0.6375
Percentage
Ordinary income (as a percent)	35.90%	95.20%	69.40%
Capital gain (as a percent)	0.00%	4.80%	0.00%
Unrecaptured Section 1250 gain (as a percent)	0.00%	0.00%	13.00%
Return of capital (as a percent)	64.10%	0.00%	17.60%
Distributions per common share (as a percent)	100.00%	100.00%	100.00%