Subsequent Events (Details)						3 Months Ended		6 Months Ended
	Jul. 31, 2015 USD ($) ft²	Jul. 24, 2015 USD ($)	Jul. 17, 2015 USD ($) item	Jun. 30, 2015 USD ($) item	Mar. 26, 2015 USD ($) ft²	Jun. 30, 2015 USD ($) item	Mar. 31, 2015 USD ($)	Jun. 30, 2015 USD ($) item
Subsequent events
Purchase price								$ 391,056,000
Elgin, IL
Subsequent events
Number of condominium units acquired | item								14
Total number of condominium units | item				19		19		19
Operating Partnership
Subsequent events
Purchase price						$ 11,300,000	$ 10,000,000
Medical office building condominium unit | Elgin, IL
Subsequent events
Number of condominium units owned | item				14		14		14
Total number of condominium units | item				19		19		19
Medical Building
Subsequent events
Area of Real Estate Property | ft²					20,329
Proceeds from sale of building					$ 1,600,000
Gain on sale of property					$ (15,000)
Medical Building | Elgin, IL
Subsequent events
Purchase price				$ 13,045,000
Subsequent events | Operating Partnership
Subsequent events
Purchase price	$ 88,261,000
Subsequent events | Operating Partnership | Grove City, OH
Subsequent events
Purchase price	$ 11,460,000
Subsequent events | Medical office building condominium unit | Elgin, IL
Subsequent events
Number of condominium units acquired | item			1
Subsequent events | Medical office building condominium unit | Operating Partnership | Elgin, IL
Subsequent events
Purchase price			$ 1,750,000
Subsequent events | Medical Building | Michigan Disposition
Subsequent events
Area of Real Estate Property | ft²	26,783
Proceeds from sale of building	$ 1,500,000
Gain on sale of property	146,000
Subsequent events | Medical Building | Operating Partnership | Atlantis, FL
Subsequent events
Purchase price		$ 11,051,000
Subsequent events | Medical Building | Operating Partnership | Kennewick WA
Subsequent events
Purchase price	$ 64,000,000