Gladstone Commercial Corporation Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Equity and Mezzanine Equity - Common Stock ATM Program (Narrative) (Details)

Equity and Mezzanine Equity - Common Stock ATM Program (Narrative) (Details) - BofA, Baird, Goldman Sachs, KeyBanc Capital Markets Inc, and Fifth Third - Common Stock - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Aug. 12, 2025	Mar. 26, 2024	Mar. 03, 2023
2023 Common Stock ATM Program
Class of Stock [Line Items]
Maximum aggregate sales price of shares to be issued under open market sale agreement				$ 250.0
Number of shares sold (in shares)	0
2024 Common Stock ATM Program
Class of Stock [Line Items]
Maximum aggregate sales price of shares to be issued under open market sale agreement		$ 250.0	$ 250.0
Number of shares sold (in shares)	4,412,814
Net proceeds from sale of shares	$ 61.0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details