Per Share Data of HTA (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Numerator:
Net income	$ 16,220		$ 5,005		$ 24,537		$ 20,622
Net income attributable to noncontrolling interests	(188)	[1]	(182)	[1]	(358)	[1]	(423)	[1]
Net income attributable to common stockholders/unitholders	$ 16,032		$ 4,823		$ 24,179		$ 20,199
Denominator:
Weighted average number of shares/units outstanding — basic	238,968		232,514		238,099		225,132
Dilutive shares	2,464		2,509		2,509		1,639
Weighted average number of shares/units outstanding — diluted	241,432		235,023		240,608		226,771
Earnings per common share - basic
Net income attributable to common stockholders (usd per share)	$ 0.07		$ 0.02		$ 0.10		$ 0.09
Earnings per common share - diluted
Net income attributable to common stockholders (usd per share)	$ 0.07		$ 0.02		$ 0.10		$ 0.09

[1] Includes amounts attributable to redeemable noncontrolling interests.