Gladstone Commercial Corporation Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Summary of Acquired Properties (Details)

Real Estate and Intangible Assets - Summary of Acquired Properties (Details) $ in Thousands						6 Months Ended
	Jun. 17, 2021 USD ($) ft² tenant	Jan. 22, 2021 USD ($) ft² tenant	Mar. 09, 2020 USD ($) ft² tenant	Jan. 27, 2020 USD ($) ft² property	Jan. 08, 2020 USD ($) ft² tenant	Jun. 30, 2021 USD ($) ft² property	Jun. 30, 2020 USD ($) ft² property
Business Acquisition [Line Items]
Number of properties acquired \| property						2	5
Aggregate Purchase Price						$ 19,341	$ 71,965
Aggregate Capitalized Acquisition Costs						$ 200	$ 300
Findlay, Ohio
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²		180,152
Weighted Average Remaining Lease Term		14 years 2 months 12 days
Aggregate Purchase Price		$ 11,100
Number of tenants \| tenant		1
Baytown, Texas
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²	25,200
Weighted Average Remaining Lease Term	12 years 7 months 6 days
Aggregate Purchase Price	$ 8,200
Number of tenants \| tenant	1
Indianapolis, Indiana
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²					64,800
Weighted Average Remaining Lease Term					7 years 2 months 12 days
Aggregate Purchase Price					$ 5,300
Number of tenants \| tenant					3
Houston, Texas; Charlotte, North Carolina; St. Charles, Missouri
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²				320,838
Weighted Average Remaining Lease Term				20 years
Aggregate Purchase Price				$ 34,700
Number of properties in portfolio \| property				3
Crandall, Georgia
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²			504,400
Weighted Average Remaining Lease Term			10 years 6 months
Aggregate Purchase Price			$ 32,000
Number of tenants \| tenant			1
Series of property acquisitions
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²						205,352	890,038
Weighted Average Remaining Lease Term						13 years 6 months	14 years 9 months 18 days
Aggregate Purchase Price						$ 19,341	$ 71,965
Aggregate Capitalized Acquisition Costs						$ 216	$ 255