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													9 Months Ended
	Sep. 20, 2022 USD ($) ft² tenant	Sep. 16, 2022 USD ($) ft² tenant	Aug. 05, 2022 USD ($) ft² tenant property	May 12, 2022 ft² tenant	May 12, 2022 USD ($) ft² tenant property	May 04, 2022 USD ($) ft² property	Mar. 11, 2022 USD ($) ft² tenant	Feb. 24, 2022 USD ($) ft² tenant	Aug. 20, 2021 USD ($) ft² property tenant	Jul. 21, 2021 USD ($) ft² property tenant	Jun. 17, 2021 USD ($) ft² tenant	Jan. 22, 2021 USD ($) ft² tenant	Sep. 30, 2022 USD ($) ft² property	Sep. 30, 2021 USD ($) ft² property
Business Acquisition [Line Items]
Number of properties acquired \| property													11	8
Aggregate Purchase Price													$ 98,276	$ 46,225
Wilkesboro, North Carolina
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²								80,000
Weighted Average Lease Term								12 years 8 months 12 days
Aggregate Purchase Price								$ 7,500
Number of tenants \| tenant	1							1
Oklahoma City, Oklahoma
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²							56,000
Weighted Average Lease Term							7 years
Aggregate Purchase Price							$ 6,000
Number of tenants \| tenant							1
Cleveland, Ohio And Fort Payne, Alabama
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²						260,719
Weighted Average Lease Term						11 years 4 months 24 days
Aggregate Purchase Price						$ 19,500
Number of tenants \| tenant				1
Wilmington, North Carolina
Business Acquisition [Line Items]
Number of properties acquired \| property					3
Aggregate Square Footage \| ft²				345,584	345,584
Weighted Average Lease Term					13 years 1 month 6 days
Aggregate Purchase Price					$ 18,900
Number of tenants \| tenant					1
Bridgeton and Vineland, New Jersey
Business Acquisition [Line Items]
Number of properties acquired \| property			2			2
Aggregate Square Footage \| ft²			246,000
Weighted Average Lease Term			15 years 1 month 6 days
Aggregate Purchase Price			$ 32,700
Number of tenants \| tenant			1
Jacksonville, Florida
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²		67,328
Weighted Average Lease Term		20 years
Aggregate Purchase Price		$ 8,100
Number of tenants \| tenant		1
Fort Payne, Alabama
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²	49,375
Weighted Average Lease Term	14 years 9 months 18 days
Aggregate Purchase Price	$ 5,600
Findlay, Ohio
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²												180,152
Weighted Average 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 Lease Term											12 years 7 months 6 days
Aggregate Purchase Price											$ 8,200
Number of tenants \| tenant											1
Pacific, Missouri
Business Acquisition [Line Items]
Number of properties acquired \| property										4
Aggregate Square Footage \| ft²										80,604
Weighted Average Lease Term										17 years 4 months 24 days
Aggregate Purchase Price										$ 22,100
Number of tenants \| tenant										1
Peru, Illinois
Business Acquisition [Line Items]
Number of properties acquired \| property									2
Aggregate Square Footage \| ft²									81,760
Weighted Average Lease Term									15 years
Aggregate Purchase Price									$ 4,800
Number of tenants \| tenant									1
Series of Property Acquisitions
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²													1,105,006	367,716
Weighted Average Lease Term													13 years 9 months 18 days	15 years 6 months
Aggregate Purchase Price													$ 98,276	$ 46,225
Aggregate Capitalized Acquisition Costs													$ 776	$ 370