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]

Mortgage Notes Payable, Credit Facility, and Senior Unsecured Notes - Unsecured Term Loan D (Narrative) (Details)

Mortgage Notes Payable, Credit Facility, and Senior Unsecured Notes - Unsecured Term Loan D (Narrative) (Details) - USD ($)	Dec. 15, 2025	Oct. 10, 2025	May 30, 2025	Dec. 18, 2024	Feb. 11, 2021	Dec. 31, 2025	Oct. 09, 2025	Sep. 18, 2025	Sep. 17, 2025	Dec. 31, 2024	Sep. 27, 2022	Aug. 18, 2022	Aug. 17, 2022	Jul. 02, 2019	Jul. 01, 2019	Oct. 31, 2015	Aug. 07, 2013
Debt Instrument [Line Items]
Long-term debt						$ 843,466,000				$ 693,385,000
Senior Unsecured Notes \| Senior Notes, 2029
Debt Instrument [Line Items]
Face amount				$ 75,000,000
Stated interest rate (as a percent)				6.47%
Long-Term Debt, Fair Value						75,800,000
Long-term debt						74,100,000
Senior Unsecured Notes \| Senior Notes, 2030
Debt Instrument [Line Items]
Face amount	$ 85,000,000
Stated interest rate (as a percent)	5.99%
Long-Term Debt, Fair Value						84,500,000
Long-term debt						84,100,000
Variable rate term loan facility B
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 143,300,000			$ 65,000,000	143,300,000	$ 60,000,000					$ 60,000,000
Repayments of debt				$ 20,000,000
Variable rate term loan facility B \| Minimum
Debt Instrument [Line Items]
Stated interest variable rates (as a percent)					1.40%
Variable rate term loan facility B \| Maximum
Debt Instrument [Line Items]
Stated interest variable rates (as a percent)					2.25%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 200,000,000				$ 200,000,000	$ 155,000,000	$ 155,000,000	$ 125,000,000		$ 125,000,000	$ 120,000,000	$ 100,000,000	$ 100,000,000.0	$ 85,000,000.0
Repayments of debt	$ 80,300,000			$ 55,000,000
Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Stated interest variable rates (as a percent)		1.40%
Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Stated interest variable rates (as a percent)		2.10%
Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity																$ 85,000,000.0	$ 60,000,000
Line of Credit \| Variable Rate Term Loan Facility D
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 20,000,000
Line of Credit \| Variable Rate Term Loan Facility D \| Minimum
Debt Instrument [Line Items]
Stated interest variable rates (as a percent)			1.55%
Line of Credit \| Variable Rate Term Loan Facility D \| Maximum
Debt Instrument [Line Items]
Stated interest variable rates (as a percent)			2.00%