v3.25.3
Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 1 Months Ended 9 Months Ended 10 Months Ended
Nov. 12, 2024
Oct. 31, 2024
Sep. 30, 2024
Oct. 31, 2024
Numerator for earnings per common share - basic:        
Net income       $ 31,715
Net income attributable to noncontrolling interest       (63)
Preferred distributions       (7,988)
Net income attributable to Equity Commonwealth common shareholders       23,664
Numerator for earnings per common share - diluted:        
Net income       31,715
Net income attributable to noncontrolling interest       (63)
Preferred distributions       (7,988)
Numerator for net income per share - diluted       $ 23,664
Denominator for earnings per common share - basic and diluted:        
Weighted average common shares outstanding — basic (in shares)       107,373
Weighted average common shares outstanding — diluted (in shares)       108,320
Net income (loss) per common share attributable to Equity Commonwealth common shareholders, basic        
Basic (in dollars per share)       $ 0.22
Net income (loss) per common share attributable to Equity Commonwealth common shareholders, diluted        
Diluted (in dollars per share)       $ 0.22
Anti-dilutive securities(4):        
Preferred shares, dividend yield     6.50%  
Weighted average number of shares, restricted stock units, unvested (in shares)   129    
Series D Preferred Stock        
Anti-dilutive securities(4):        
Preferred shares, dividend yield 6.50%     6.50%
Series D Preferred Stock        
Anti-dilutive securities(4):        
Effect of anti-dilutive securities (in shares)       4,032
Operating Partnership Units and Time-Based LTIP Units        
Anti-dilutive securities(4):        
Effect of anti-dilutive securities (in shares)       177
RSUs        
Denominator for earnings per common share - basic and diluted:        
Weighted average number of common shares outstanding, dilutive adjustment (in shares)       844
LTIP Units        
Denominator for earnings per common share - basic and diluted:        
Weighted average number of common shares outstanding, dilutive adjustment (in shares)       103