Leases - Rent Deferrals (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Lessor, Lease, Description [Line Items]
Rent deferred during the period	$ 0	$ 0
Medical Office
Lessor, Lease, Description [Line Items]
Rent deferred during the period			$ 6,000,000
Life Science
Lessor, Lease, Description [Line Items]
Rent deferred during the period			$ 1,000,000