Mortgage Notes Receivable - Narrative (Details) $ in Millions				1 Months Ended	12 Months Ended
		Oct. 29, 2014 USD ($)	May. 22, 2014 USD ($)	May. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) mortgage_note_receivable		Dec. 31, 2014 USD ($) mortgage_note_receivable
Mortgage Loans on Real Estate [Line Items]
Purchase Price					$ 190.1
Cash Consideration	[1]				156.4
Construction mortgage note receivable prepayment							$ 81.2
Real estate acquisitions [Member]
Mortgage Loans on Real Estate [Line Items]
Purchase Price					187.2		168.5
Cash Consideration					$ 153.5	[1]	69.9	[2]
Real estate acquisitions [Member] | Oklahoma [Member]
Mortgage Loans on Real Estate [Line Items]
Purchase Price		$ 17.5	$ 85.4
Cash Consideration	[2]	$ 10.8	$ 4.1
Percentage of Medical Office Building Leased		97.00%	100.00%
Real estate acquisitions [Member] | Construction Loans [Member] | Oklahoma [Member]
Mortgage Loans on Real Estate [Line Items]
Purchase Price				$ 85.4
Face Amount				81.2
Cash Consideration				$ 4.1
Percentage of Medical Office Building Leased				100.00%
Construction mortgage note receivable prepayment							$ 1.2
Mortgage Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
Number of Mortgage Notes Receivable Outstanding | mortgage_note_receivable					0		1
Mortgage Notes Receivable Outstanding							$ 1.9

[1] Cash consideration excludes prorations of revenue and expense due to/from seller at the time of the acquisition.

[2] Cash consideration excludes non-real estate assets acquired and liabilities assumed in the acquisitions.