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

Subsequent Events - Schedule of Monthly Distributions Declared (Details) - $ / shares	1 Months Ended			3 Months Ended	12 Months Ended
	Mar. 31, 2026	Feb. 28, 2026	Jan. 31, 2026	Mar. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Dividends Payable [Line Items]
Distributions declared per common stock (in dollars per share)					$ 1.20	$ 1.20	$ 1.20
Subsequent Event
Dividends Payable [Line Items]
Distributions declared per common stock (in dollars per share)	$ 0.10	$ 0.10	$ 0.10	$ 0.30
Series E Preferred Stock \| Subsequent Event
Dividends Payable [Line Items]
Distributions declared per preferred stock (in dollars per share)	0.138021	0.138021	0.138021	0.414063
Series G Preferred Stock \| Subsequent Event
Dividends Payable [Line Items]
Distributions declared per preferred stock (in dollars per share)	0.125	0.125	0.125	0.375
Series F Preferred Stock \| Subsequent Event
Dividends Payable [Line Items]
Distributions declared per preferred stock (in dollars per share)	0.125	0.125	0.125	0.375
Senior Common Stock \| Subsequent Event
Dividends Payable [Line Items]
Distributions declared per common stock (in dollars per share)	$ 0.0875	$ 0.0875	$ 0.0875	$ 0.2625