Organization and Summary of Significant Accounting Policies - (Summary of tenants classified as cash basis) (Details) - Tenant	Mar. 31, 2022	Mar. 31, 2021
Accounting Policies [Abstract]
Percentage of tenants for which revenue recognized on cash basis	9	12
Cash basis tenants as a percent of:
Percentage of total properties for which revenue recognized on cash basis	5.40%	6.10%
Percentage of aggregate gross leasable area for which revenue recognized on cash basis	7.00%	7.70%