Commitments and Contingencies - Casualty Loss (Details) - Medical Office Building [Member] - OKLAHOMA - Loss from Catastrophes [Member] $ in Millions	Jun. 30, 2015 USD ($)
Loss Contingencies [Line Items]
Estimated expenditures to restore property	$ 2.2
Estimated recoveries for restoration costs	2.1
Estimate of insurance proceeds	$ 0.2