Gladstone Commercial Corporation Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

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

Real Estate and Intangible Assets - Schedule of Acquired Properties (Details) $ in Thousands							9 Months Ended
	Jun. 25, 2025 USD ($) ft² tenant property	May 09, 2025 USD ($) ft² tenant	Mar. 28, 2025 USD ($) ft² tenant	Feb. 19, 2025 USD ($) ft² tenant property	Aug. 29, 2024 USD ($) ft²	May 07, 2024 USD ($) ft² property tenant	Sep. 30, 2025 USD ($) ft² property	Sep. 30, 2024 USD ($) ft² property
Business Combination [Line Items]
Number of properties acquired \| property							19	6
Aggregate Square Footage \| ft²							17,700,000
Aggregate Purchase Price							$ 207,905	$ 22,122
Houston, Texas
Business Combination [Line Items]
Number of properties acquired \| property				5
Aggregate Square Footage \| ft²				215,474
Number of tenants \| tenant				1
Weighted Average Remaining Lease Term at Time of Acquisition				10 years
Aggregate Purchase Price				$ 29,500
Dallas Fort Worth, Texas
Business Combination [Line Items]
Aggregate Square Footage \| ft²			140,304
Number of tenants \| tenant			1
Weighted Average Remaining Lease Term at Time of Acquisition			11 years 3 months 18 days
Aggregate Purchase Price			$ 44,300
Germantown, Wisconsin
Business Combination [Line Items]
Aggregate Square Footage \| ft²		303,991
Number of tenants \| tenant		1
Weighted Average Remaining Lease Term at Time of Acquisition		19 years 4 months 24 days
Aggregate Purchase Price		$ 62,900
Harrison Township, Michigan
Business Combination [Line Items]
Number of properties acquired \| property	3
Aggregate Square Footage \| ft²	215,102
Number of tenants \| tenant	1
Weighted Average Remaining Lease Term at Time of Acquisition	10 years
Aggregate Purchase Price	$ 16,500
Cartersville, Georgia; Ossian, Indiana; Ligonier, Indiana; Caro, Michigan; Chesterfield, Michigan; and Cass City, Michigan
Business Combination [Line Items]
Number of properties acquired \| property	9
Aggregate Square Footage \| ft²	693,236
Number of tenants \| tenant	1
Weighted Average Remaining Lease Term at Time of Acquisition	20 years
Aggregate Purchase Price	$ 54,800
Caro, Michigan
Business Combination [Line Items]
Number of properties acquired \| property	4
Warfordsburg, Pennsylvania
Business Combination [Line Items]
Number of properties acquired \| property						5
Aggregate Square Footage \| ft²						142,125
Number of tenants \| tenant						1
Weighted Average Remaining Lease Term at Time of Acquisition						25 years 1 month 6 days
Aggregate Purchase Price						$ 12,000
Midland, Texas
Business Combination [Line Items]
Aggregate Square Footage \| ft²					50,102
Number of tenants \| tenant						1
Weighted Average Remaining Lease Term at Time of Acquisition						15 years
Aggregate Purchase Price					$ 10,200
Series of Property Acquisitions
Business Combination [Line Items]
Aggregate Square Footage \| ft²							1,568,107	192,227
Weighted Average Remaining Lease Term at Time of Acquisition							15 years 10 months 24 days	21 years
Aggregate Purchase Price							$ 207,905	$ 22,122
Aggregate Capitalized Acquisition Expenses							$ 1,205	$ 435