Leases - Internal Ratings For Net Investment, DFLs (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lessor, Lease, Description [Line Items]
Net investment in direct financing leases before allowance	$ 44,706	$ 84,604
Percentage of DFL Portfolio	100.00%
Medical Office
Lessor, Lease, Description [Line Items]
Net investment in direct financing leases before allowance	$ 44,706
Percentage of DFL Portfolio	100.00%
Performing DFLs
Lessor, Lease, Description [Line Items]
Net investment in direct financing leases before allowance	$ 44,706
Performing DFLs | Medical Office
Lessor, Lease, Description [Line Items]
Net investment in direct financing leases before allowance	44,706
Watch List DFLs
Lessor, Lease, Description [Line Items]
Net investment in direct financing leases before allowance	0
Watch List DFLs | Medical Office
Lessor, Lease, Description [Line Items]
Net investment in direct financing leases before allowance	0
Workout DFLs
Lessor, Lease, Description [Line Items]
Net investment in direct financing leases before allowance	0
Workout DFLs | Medical Office
Lessor, Lease, Description [Line Items]
Net investment in direct financing leases before allowance	$ 0