Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands					1 Months Ended	3 Months Ended
	Apr. 18, 2016 $ / shares	Mar. 31, 2016 USD ($)	Mar. 18, 2016 $ / shares	Mar. 01, 2015 USD ($)	May. 06, 2016 USD ($)	Mar. 31, 2016 USD ($) buildings mezzanine_loan $ / shares shares	Mar. 31, 2015 USD ($) $ / shares	Dec. 31, 2015 USD ($)
Entity Information [Line Items]
Ownership interest in consolidated subsidiaries (as a percent)						100.00%
Purchase price						$ 202,338
Percentage of interest held		96.50%
Operating partnership units redemption ratio						1
Fair value of embedded derivative		$ 8,610				$ 8,610		$ 8,149
Cash dividend declared to common shareholders (in dollars per share) | $ / shares			$ 0.225			$ 0.225	$ 0.225
Impairment loss						$ 0	$ 0
Number of mezzanine loans collateralized | mezzanine_loan						7
Number of medical office building developments as collateral for real estate loans receivable | buildings						1
Rental revenue due in excess of amounts currently due from tenants		18,800				$ 18,800		$ 15,600
Operating Partnership
Entity Information [Line Items]
Purchase price						$ 8,500
Units | Operating Partnership
Entity Information [Line Items]
Number of units issued for funding purchase price | shares						174,085
Supplemental disclosure of noncash activity - issuance of OP Units and Series A Preferred Units in connection with acquisitions		$ 2,900				$ 2,900
Minnetonka MOB
Entity Information [Line Items]
Equity method investment received				$ 5,000
Percentage OF Internal Rate Of Return				15.00%
Minnetonka MOB | Series A Preferred Units
Entity Information [Line Items]
Cumulative preferred return						5.00%
Redemption value (in dollars per share) | $ / shares						$ 200
Subsequent events
Entity Information [Line Items]
Purchase price					$ 17,619
Cash dividend distributed to common shareholders (in dollars per share) | $ / shares	$ 0.225