Rental Property - Acquisitions - Allocation of Consideration (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Allocation of the consideration paid for the acquired assets and liabilities
Land	$ 15,338
Buildings	135,570
Tenant improvements	2,096
Building and land improvements	8,895
Other assets	450
Operating lease right-of-use assets	24,124	$ 15,129
Total purchase price	195,939
Operating lease liabilities	(26,414)	$ (16,989)
Acquisitions 2020
Allocation of the consideration paid for the acquired assets and liabilities
Operating lease right-of-use assets	2,321
Operating lease liabilities	(2,321)
Construction in progress
Allocation of the consideration paid for the acquired assets and liabilities
Construction in progress	669
In-place leases
Allocation of the consideration paid for the acquired assets and liabilities
Deferred leasing intangibles	$ (21,496)
Weighted average amortization period of lease intangibles	8 years
Tenant relationships
Allocation of the consideration paid for the acquired assets and liabilities
Deferred leasing intangibles	$ (10,150)
Weighted average amortization period of lease intangibles	11 years 1 month 6 days
Above market leases
Allocation of the consideration paid for the acquired assets and liabilities
Deferred leasing intangibles	$ (3,962)
Weighted average amortization period of lease intangibles	12 years 7 months 6 days
Below market leases
Allocation of the consideration paid for the acquired assets and liabilities
Deferred leasing intangibles	$ 2,687
Weighted average amortization period of lease intangibles	5 years 3 months 18 days