Supplemental Financial Statement Information - Other And Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Assets
Deposits on building and land acquisitions	$ 6,455	$ 365
Deferred leasing costs, net	7,173	5,352
Straight- line rents	6,876	6,700
Prepaid expenses	4,622	2,618
Intangible assets, net	4,475	2,126
Account receivable (primary leases)	1,477	254
Deferred financing costs related to revolving lines of credit	988	162
Prepaid development costs	966	798
Furniture, fixtures and equipment, net	701	181
Right-of-use assets	622	707
Proceeds from sales of real estate assets held in escrow	592	1,993
Registration statement costs	532
Mortgage escrows	366	558
Interest rate swap assets	156
Other	418	323
Total other assets	$ 36,419	$ 22,137