Commitments and Contingencies - Construction Activity (Details) - Medical office building $ in Millions	3 Months Ended
	Jun. 30, 2021 USD ($)	Sep. 30, 2021 USD ($) ft²	Jul. 31, 2021 ft²
Dallas, Texas
Other Commitments [Line Items]
Square footage of building under redevelopment		110,860
Approximate square feet		217,114
Construction activity, total funding to date | $		$ 2.1
Memphis, Tennessee
Other Commitments [Line Items]
Approximate square feet		110,883
Construction activity, total funding to date | $		$ 31.1
Tacoma, WA
Other Commitments [Line Items]
Approximate square feet		23,000
Construction activity, total funding to date | $		$ 1.7
Nashville, TN
Other Commitments [Line Items]
Approximate square feet			106,194
Construction activity, total funding to date | $		$ 0.8
Square footage of building to be demolished		81,000
Impairment charge | $	$ 5.0