Gladstone Commercial Corporation Annual report pursuant to Section 13 and 15(d)

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

Real Estate and Intangible Assets - Summary of Properties Acquired (Detail) $ in Thousands														12 Months Ended
	Dec. 21, 2021 USD ($) ft² tenant	Nov. 03, 2021 USD ($) 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	Dec. 21, 2020 USD ($) ft² tenant	Dec. 18, 2020 USD ($) ft² tenant	Oct. 14, 2020 USD ($) ft² tenant	Sep. 01, 2020 USD ($) ft² tenant	Mar. 09, 2020 USD ($) ft² tenant	Jan. 27, 2020 USD ($) ft² property	Jan. 08, 2020 USD ($) ft² tenant	Dec. 31, 2021 USD ($) ft² property	Dec. 31, 2020 USD ($) ft² property
Business Acquisition [Line Items]
Number of properties acquired \| property														11	9
Aggregate Purchase Price														$ 100,453	$ 129,974
Series of Property Acquisitions
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²														949,174	1,717,502
Lease Term														13 years 4 months 24 days	12 years 2 months 12 days
Aggregate Purchase Price														$ 100,453	$ 129,974
Acquisition Expenses														$ 798	$ 814
Findley, Ohio
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²						180,152
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
Lease Term					12 years 7 months 6 days
Aggregate Purchase Price					$ 8,200
Number of tenants \| tenant					1
Pacific, Missouri
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²				80,604
Lease Term				17 years 4 months 24 days
Aggregate Purchase Price				$ 22,100
Number of tenants \| tenant				1
Number of properties in portfolio \| property				4
Peru, Illinois
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²			81,760
Lease Term			15 years
Aggregate Purchase Price			$ 4,800
Number of tenants \| tenant			1
Number of properties in portfolio \| property			2
Charlotte, North Carolina
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²		161,458
Lease Term		7 years 10 months 24 days
Aggregate Purchase Price		$ 12,900
Number of tenants \| tenant		1
Atlanta, Georgia
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²	120,000
Lease Term	15 years
Aggregate Purchase Price	$ 12,100
Number of tenants \| tenant	1
Crossvile, Tennessee
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²	300,000
Lease Term	11 years
Aggregate Purchase Price	$ 29,200
Number of tenants \| tenant	1
Indianapolis, Indiana
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²										153,600			64,800
Lease Term										9 years 8 months 12 days			7 years 2 months 12 days
Aggregate Purchase Price										$ 10,600			$ 5,300
Number of tenants \| tenant										1			3
Houston Texas, Charlotte North Carolina, And St. Charles Missouri
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²												320,838
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
Lease Term											10 years 6 months
Aggregate Purchase Price											$ 32,000
Number of tenants \| tenant											1
Montgomery, Alabama
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²									240,714
Lease Term									7 years 2 months 12 days
Aggregate Purchase Price									$ 14,300
Number of tenants \| tenant									1
Huntsville, Alabama
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²								277,883
Lease Term								9 years 2 months 12 days
Aggregate Purchase Price								$ 20,000
Number of tenants \| tenant								1
Pittsburgh, Pennsylvania
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²							155,267
Lease Term							10 years
Aggregate Purchase Price							$ 13,000
Number of tenants \| tenant							1