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									6 Months Ended
	Mar. 09, 2020 USD ($) ft²	Jan. 27, 2020 USD ($) ft² property	Jan. 08, 2020 USD ($) ft² tenant	Jun. 18, 2019 USD ($) ft²	Apr. 30, 2019 USD ($) ft²	Apr. 05, 2019 USD ($) ft²	Feb. 28, 2019 USD ($) ft²	Feb. 08, 2019 USD ($) ft²	Jun. 30, 2020 USD ($) ft² property	Jun. 30, 2019 USD ($) ft² property
Business Acquisition [Line Items]
Number of properties acquired \| property									5	6
Aggregate Purchase Price									$ 71,965	$ 46,563
Indianapolis, Indiana
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²			64,800				34,800
Weighted Average Lease Term			7 years 2 months 12 days				10 years
Aggregate Purchase Price			$ 5,300				$ 3,600
Aggregate Annualized GAAP Fixed Lease Payments			$ 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
Series of property acquisitions
Business Acquisition [Line Items]
Aggregate Square Footage \| ft²									890,038	1,174,311
Weighted Average Lease Term									14 years 9 months 18 days	13 years 8 months 12 days
Aggregate Purchase Price									$ 71,965	$ 46,563
Capitalized Acquisition Expenses									255	452
Aggregate Annualized GAAP Fixed Lease Payments									5,303	3,819
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%