Quarterly report pursuant to Section 13 or 15(d)

Equity and Mezzanine Equity - Additional Information (Details)

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Equity and Mezzanine Equity - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Mar. 13, 2024
Nov. 23, 2022
Feb. 20, 2020
Feb. 19, 2020
Class of Stock [Line Items]            
Temporary equity, contract terms, trigger change in control 50.00%          
Common stock, shares outstanding (in shares) 40,003,481 40,000,596     60,290,000 86,290,000
Units held by noncontrolling owners (in shares) 310,643 310,643        
Gladstone Commercial Limited Partnership            
Class of Stock [Line Items]            
Company ownership percentage of voting securities 99.20% 99.20%        
Series D Preferred Stock            
Class of Stock [Line Items]            
Temporary equity, contract terms, minimum vote needed to trigger change in control from tender offer 90.00%          
Preferred Stock | Series E Preferred Stock            
Class of Stock [Line Items]            
Redeemable preferred stock, dividend rate 6.625%          
Preferred Stock | Series G Preferred Stock            
Class of Stock [Line Items]            
Redeemable preferred stock, dividend rate 6.00%          
Preferred Stock | Series F Preferred Stock            
Class of Stock [Line Items]            
Number of shares sold (in shares) 7,580          
Redeemable preferred stock, shares authorized (in shares)         26,000,000  
Consideration received $ 0.2          
Common Stock ATM Program | BofA, Baird, Goldman Sachs, KeyBanc Capital Markets Inc, and Fifth Third | Common Stock            
Class of Stock [Line Items]            
Number of shares sold (in shares) 0          
Maximum aggregate sales price of shares to be issued under open market sale agreement $ 250.0     $ 250.0    
2022 Registration Statement            
Class of Stock [Line Items]            
Universal registration statement, amount authorized     $ 1,300.0