v3.25.4
Net Income Available to Common Unitholders Per Unit of the Operating Partnership - Basic and Diluted Net Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Numerator:      
Net income $ 302,640 $ 232,954 $ 238,288
Net income available to common unitholders 276,121 210,969 212,241
Allocation to participating securities (925) (1,967) (1,233)
Numerator for basic and diluted net income available to common unitholders $ 275,196 $ 209,002 $ 211,008
Denominator:      
Basic weighted average vested units outstanding (in shares) 118,278,990 117,649,111 117,160,173
Effect of dilutive securities (in shares) 553,045 507,876 346,082
Diluted weighted average vested shares and common stock/ unit equivalents outstanding (in shares) 118,832,035 118,156,987 117,506,255
Basic earnings per unit:      
Net income available to common unitholders per unit (in dollars per share) $ 2.33 $ 1.78 $ 1.80
Diluted earnings per unit:      
Net income available to common unitholders per unit (in dollars per share) $ 2.32 $ 1.77 $ 1.80
Kilroy Realty L.P.      
Numerator:      
Net income $ 302,640 $ 232,954 $ 238,288
Net income available to common unitholders 278,803 213,031 214,324
Allocation to participating securities (925) (1,967) (1,233)
Numerator for basic and diluted net income available to common unitholders $ 277,878 $ 211,064 $ 213,091
Denominator:      
Basic weighted average vested units outstanding (in shares) 119,428,865 118,799,685 118,310,747
Effect of dilutive securities (in shares) 553,045 507,876 346,082
Diluted weighted average vested shares and common stock/ unit equivalents outstanding (in shares) 119,981,910 119,307,561 118,656,829
Basic earnings per unit:      
Net income available to common unitholders per unit (in dollars per share) $ 2.33 $ 1.78 $ 1.80
Diluted earnings per unit:      
Net income available to common unitholders per unit (in dollars per share) $ 2.32 $ 1.77 $ 1.80
Kilroy Realty L.P. | Partners’ Capital      
Numerator:      
Net income $ 278,803 $ 213,031 $ 214,324