Tax Treatment of Dividends of HTA (Unaudited) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Ordinary income	62.02%	46.93%	40.88%
Return of capital	37.83%	53.07%	59.12%
Capital gain	0.15%	0.00%	0.00%
Total	100.00%	100.00%	100.00%