Income Taxes (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Dividends paid to holders of common stock
Ordinary income	$ 0.17	$ 0.00	$ 0.00
Ordinary income, percentage	17.90%	0.00%	0.00%
Capital gains	$ 0.13	$ 0.35	$ 0.12
Capital gains, percentage	13.90%	46.60%	24.00%
Unrecaptured Section 1250 gain	$ 0.66	$ 0.41	$ 0.36
Unrecaptured Section 1250 gain, percentage	68.20%	53.40%	76.00%
Dividends declared per common share/unit	$ 0.96	$ 0.76	$ 0.48
Dividends declared per common share, percentage	100.00%	100.00%	100.00%