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

Real Estate and Intangible Assets - Schedule of Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Details)	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Intangible Asset, Finite-Lived, Acquired [Line Items]
Weighted average amortization period (in years)	5 years 10 months 24 days	15 years 1 month 6 days
In-place leases
Intangible Asset, Finite-Lived, Acquired [Line Items]
Weighted average amortization period (in years)	5 years 10 months 24 days	13 years 10 months 24 days
Leasing costs
Intangible Asset, Finite-Lived, Acquired [Line Items]
Weighted average amortization period (in years)	5 years 10 months 24 days	13 years 10 months 24 days
Customer relationships
Intangible Asset, Finite-Lived, Acquired [Line Items]
Weighted average amortization period (in years)	5 years 10 months 24 days	18 years 7 months 6 days
Above market leases
Intangible Asset, Finite-Lived, Acquired [Line Items]
Weighted average amortization period (in years)	0 years	19 years 4 months 24 days
Below market leases
Intangible Asset, Finite-Lived, Acquired [Line Items]
Weighted average amortization period (in years)	5 years 10 months 24 days	10 years 8 months 12 days