Gladstone Commercial Corporation Quarterly report [Sections 13 or 15(d)]

Subsequent Events - Narrative (Details) $ in Thousands			6 Months Ended
Subsequent Events - Narrative (Details) $ in Thousands	Jul. 28, 2026 USD ($) ft² tenant	Jun. 25, 2026 USD ($)	Jun. 30, 2026 USD ($) ft²	Jun. 30, 2025 USD ($) ft²
Subsequent Event [Line Items]
Aggregate square footage \| ft²			153,890	874,871
Purchase price \| $		$ 700	$ 23,004	$ 153,067
Remaining lease term (in years)			5 years 10 months 24 days	14 years 3 months 18 days
Red Bud, Illinois \| Subsequent Event
Subsequent Event [Line Items]
Aggregate square footage \| ft²	146,650
Purchase price \| $	$ 6,600
Number of tenants \| tenant	1
Remaining lease term (in years)	8 years 4 months 24 days