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

Annual report pursuant to Section 13 and 15(d)

Equity and Mezzanine Equity - Additional Information (Details)

Equity and Mezzanine Equity - Additional Information (Details) $ / shares in Units, $ in Thousands				1 Months Ended	12 Months Ended
	Sep. 20, 2022 USD ($) ft² shares	Jun. 30, 2021 USD ($) $ / shares shares	Jun. 28, 2021 USD ($) $ / shares shares	Feb. 29, 2020	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Aug. 05, 2021 shares	Jun. 23, 2021 shares	Feb. 20, 2020 shares	Feb. 19, 2020 shares	Jan. 29, 2020 USD ($)	Dec. 31, 2019 shares	Dec. 03, 2019 USD ($)	Jan. 11, 2019 USD ($)
Class of Stock [Line Items]
Net proceeds from sale of shares \| $			$ 96,600
Sale of stock, price per share (in dollars per share) \| $ / shares			$ 25.00
Gross proceeds from sale of stock \| $			$ 100,000
Common stock, shares authorized (in shares) \| shares					62,305,727	62,290,000
Common stock, shares outstanding (in shares) \| shares					39,744,359	37,473,587				60,290,000	86,290,000
Aggregate Purchase Price \| $					$ 115,364	$ 100,453
Ownership by noncontrolling owners, shares outstanding (in shares) \| shares					391,468	256,994
Fort Payne, Alabama
Class of Stock [Line Items]
Aggregate Square Footage \| ft²	49,375
Aggregate Purchase Price \| $	$ 5,600
Operating Partnership
Class of Stock [Line Items]
Company ownership percentage of voting securities					99.00%	99.30%
Units issued \| shares	134,474
Number of units redeemed in acquisition (in shares) \| shares						246,039
Series D Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Minimum vote need to trigger change in control from tender offer					90.00%
Stock redeemed (in shares) \| shares		3,509,555
Preferred stock, redemption price per share (in usd per share) \| $ / shares		$ 25.1458333
Stock redeemed \| $		$ 88,300
Preferred stock adjustments \| $		$ 2,100
Series D Preferred Stock
Class of Stock [Line Items]
Stock redeemed \| $							$ 2,141
Series F Preferred Stock
Class of Stock [Line Items]
Stock redeemed \| $					$ (164)
Redeemable preferred stock, shares authorized (in shares) \| shares					25,992,787	26,000,000
Series G Preferred Stock
Class of Stock [Line Items]
Stock redeemed \| $					$ (37)
Redeemable preferred stock, shares authorized (in shares) \| shares									4,000,000
Common Stock and Non-controlling OP Units
Class of Stock [Line Items]
Stock redeemed (in shares) \| shares						246,039
Common stock, shares authorized (in shares) \| shares								62,290,000
Common stock, shares outstanding (in shares) \| shares					39,744,359	37,473,587	35,331,970						32,593,651
Preferred Stock \| Series D Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividend rate					7.00%
Preferred Stock \| Series E Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividend rate					6.625%
Preferred Stock \| Series G Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Preferred stock, dividend rate					6.00%
Preferred Stock \| Series D Preferred Stock
Class of Stock [Line Items]
Redeemable preferred stock, shares authorized (in shares) \| shares								2,490,445
Preferred Stock \| Series E Preferred Stock
Class of Stock [Line Items]
Redeemable preferred stock, shares authorized (in shares) \| shares								6,760,000
Preferred Stock \| Series F Preferred Stock
Class of Stock [Line Items]
Number of shares sold (in shares) \| shares					200,000
Net proceeds from sale of shares \| $					$ 5,400
Open market dale agreement, value of remaining capacity \| $					619,600
Preferred stock, dividend rate				6.00%
Redeemable preferred stock, shares authorized (in shares) \| shares								26,000,000		26,000,000
Preferred Stock \| Series G Preferred Stock
Class of Stock [Line Items]
Redeemable preferred stock, shares authorized (in shares) \| shares								4,000,000
Senior Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares) \| shares								950,000
Public Stock Offering
Class of Stock [Line Items]
Number of shares sold (in shares) \| shares			4,000,000
2019 Registration Statement
Class of Stock [Line Items]
Universal registration statement, amount authorized \| $															$ 500,000
2020 Registration Statement
Class of Stock [Line Items]
Universal registration statement, amount authorized \| $					$ 644,000							$ 800,000
2020 Registration Statement \| Preferred Stock \| Series F Preferred Stock
Class of Stock [Line Items]
Universal registration statement, amount authorized \| $												$ 636,500
Baird, Goldman Sachs, Stifel, and Fifth Third \| Common Stock ATM Program \| Common Stock and Non-controlling OP Units
Class of Stock [Line Items]
Maximum aggregate sales price of shares to be issued under open market sale agreement \| $														$ 250,000
Number of shares sold (in shares) \| shares					2,100,000
Net proceeds from sale of shares \| $					$ 43,200
Open market dale agreement, value of remaining capacity \| $					23,900
Baird, Goldman Sachs, Stifel, Fifth Third, and U.S. Bancorp Investments, Inc. \| Series E Preferred Stock ATM Program
Class of Stock [Line Items]
Maximum aggregate sales price of shares to be issued under open market sale agreement \| $					100,000
Open market dale agreement, value of remaining capacity \| $					$ 92,800