Acquisitions and Dispositions (Details 1) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($) condominium_units states healthcareproperty
Business Acquisition [Line Items]
Number Of States In Which Operating Healthcare Properties And Land Parcel Located \| states		20
Business Combination, Consideration Transferred	$ 679,528	$ 881,900
Loans
Business Acquisition [Line Items]
Mortgage Loans on Real Estate, New Mortgage Loans		$ 3,500
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Number of Operating Healthcare Properties \| healthcareproperty		71
Number Of Condominium Units \| condominium_units		2
Payments to Acquire Businesses, Gross		$ 878,400
CHI Portfolio
Business Acquisition [Line Items]
Number of Operating Healthcare Properties \| healthcareproperty		46
Business Combination, Consideration Transferred		$ 615,500
Near-term capital expenditure commitments \| CHI Portfolio
Business Acquisition [Line Items]
Other Commitment	12,900	12,900
Committed tenant improvement allowances \| CHI Portfolio
Business Acquisition [Line Items]
Other Commitment	$ 8,900	$ 8,900

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