Impairment and Dispositions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) building	Dec. 31, 2014 USD ($) portfolio	Dec. 31, 2013 USD ($)
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]
Number of MOBs disposed | building	6
Aggregate gross sales price of MOBs disposed	$ 35,700
Gain from sale of dispositions of properties	152	$ 27,894	$ 0
Impairment charge on medical office building marketed for sale	2,581	$ 0	$ 0
Impairment on properties disposed of	1,700
Impairment on property being marketed for sale	$ 900
Number of dispositions of portfolios of medical office buildings | portfolio		3
Aggregate gross sales price of disposed portfolios of medical office buildings		$ 82,900