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

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. 01, 2020 USD ($) ft²	Mar. 09, 2020 USD ($) ft²	Jan. 27, 2020 USD ($) ft² property	Jan. 08, 2020 USD ($) ft² tenant	Sep. 26, 2019 USD ($) ft² property	Jul. 30, 2019 USD ($) ft²	Jun. 18, 2019 USD ($) ft²	Apr. 30, 2019 USD ($) ft²	Apr. 05, 2019 USD ($) ft²	Feb. 28, 2019 USD ($) ft²	Feb. 08, 2019 USD ($) ft²	Sep. 30, 2020 USD ($) ft² property	Sep. 30, 2019 USD ($) ft² property
Business Acquisition [Line Items]
Number of properties acquired \| property												6	9
Aggregate Purchase Price												$ 82,599	$ 67,272
Indianapolis, Indiana
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²	153,600			64,800						34,800
Weighted Average Lease Term	9 years 8 months 12 days			7 years 2 months 12 days						10 years
Aggregate Purchase Price	$ 10,600			$ 5,300						$ 3,600
Aggregate Annualized GAAP Fixed Lease Payments	$ 800			$ 500						$ 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 Lease Term			20 years
Aggregate Purchase Price			$ 34,700
Aggregate Annualized GAAP Fixed Lease Payments			$ 2,600
Number of properties in portfolio \| property			3
Chatsworth, Georgia
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²		504,400
Weighted Average Lease Term		10 years 6 months
Aggregate Purchase Price		$ 32,000
Aggregate Annualized GAAP Fixed Lease Payments		2,200
Philadelphia, Pennsylvania
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²											26,050
Weighted Average Lease Term											15 years 1 month 6 days
Aggregate Purchase Price											$ 2,700
Aggregate Annualized GAAP Fixed Lease Payments											$ 200
Ocala, Florida
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²									207,000
Weighted Average Lease Term									20 years 1 month 6 days
Aggregate Purchase Price									$ 11,900
Aggregate Annualized GAAP Fixed Lease Payments									$ 800
Ocala, Florida
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²									176,000
Weighted Average Lease Term									20 years 1 month 6 days
Aggregate Purchase Price									$ 7,300
Aggregate Annualized GAAP Fixed Lease Payments									$ 700
Columbus, Ohio
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²								54,430
Weighted Average Lease Term								7 years
Aggregate Purchase Price								$ 3,200
Aggregate Annualized GAAP Fixed Lease Payments								$ 200
Tifton, Georgia
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²							676,031
Weighted Average Lease Term							8 years 6 months
Aggregate Purchase Price							$ 17,900
Aggregate Annualized GAAP Fixed Lease Payments							1,600
Denton, Texas
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²						78,452
Weighted Average Lease Term						11 years 10 months 24 days
Aggregate Purchase Price						$ 6,600
Aggregate Annualized GAAP Fixed Lease Payments						$ 500
Temple, Texas
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²					211,000
Weighted Average Lease Term					20 years
Aggregate Purchase Price					$ 14,100
Aggregate Annualized GAAP Fixed Lease Payments					$ 1,200
Number of properties in portfolio \| property					2
Series of property acquisitions
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²												1,043,638	1,463,763
Weighted Average Lease Term												14 years 2 months 12 days	14 years 9 months 18 days
Aggregate Purchase Price												$ 82,599	$ 67,272
Capitalized Acquisition Expenses												339	621
Aggregate Annualized GAAP Fixed Lease Payments												6,146	5,437
Aggregate Debt Issued or Assumed												35,855	$ 8,900
New fixed rate mortgage notes payable
Business Acquisition [Line Items]
Debt assumed												35,855
New fixed rate mortgage notes payable \| Houston, Texas; Charlotte, North Carolina; St. Charles, Missouri
Business Acquisition [Line Items]
Debt assumed												$ 18,300
Stated interest rate (as percent)												3.625%
New fixed rate mortgage notes payable \| Tifton, Georgia
Business Acquisition [Line Items]
Debt assumed							$ 8,900
Stated interest rate (as percent)							4.35%
Interest rate swaps \| Chatsworth, Georgia
Business Acquisition [Line Items]
Aggregate Debt Issued or Assumed		$ 17,500
Stated interest rate (as percent)		2.80%