Per Share Data of HTA (Details) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended			9 Months Ended
		Dec. 15, 2014	Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2014 USD ($) $ / shares shares		Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2014 USD ($) $ / shares shares
Numerator:
Net income | $			$ 6,554	$ 16,220		$ 22,984	$ 24,537
Net income attributable to noncontrolling interests | $	[1]		(91)	(188)		(425)	(358)
Net income attributable to common stockholders/unitholders | $			$ 6,463	$ 16,032		$ 22,559	$ 24,179
Denominator:
Weighted average shares outstanding - basic			126,863	119,484	[2]	125,750	119,049	[2]
Dilutive shares	[2]		1,930	1,232		1,930	1,255
Weighted average number of shares/units outstanding — diluted			128,793	120,716	[2]	127,680	120,304	[2]
Earnings per common share - basic
Net income attributable to common stockholders (usd per share) | $ / shares			$ 0.05	$ 0.13	[2]	$ 0.18	$ 0.20	[2]
Earnings per common share - diluted
Net income attributable to common stockholders (usd per share) | $ / shares			$ 0.05	$ 0.13	[2]	$ 0.18	$ 0.20	[2]
Reverse stock split conversion ratio		0.5

[1] Includes amounts attributable to redeemable noncontrolling interests.

[2] For the three and nine months ended September 30, 2014, amounts have been adjusted retroactively to reflect a 1-for-2 reverse stock split effected on December 15, 2014.