v3.26.1
Secured and Unsecured Debt of the Operating Partnership - Schedule of Debt Maturities (Details) - USD ($)
$ in Thousands
Apr. 30, 2026
Apr. 20, 2026
Mar. 31, 2026
Dec. 31, 2025
Debt Instrument [Line Items]        
Unamortized deferred financing costs     $ (8,264) $ (9,150)
Senior Notes | 4.300% Weighted-Average Private Placement Senior Notes | Subsequent Event        
Debt Instrument [Line Items]        
Total aggregate principal value   $ 50,000    
Stated interest rate on debt (percent)   4.30%    
Kilroy Realty L.P.        
Debt Instrument [Line Items]        
Remaining 2026     599,717  
2027     249,125  
2028     400,000  
2029     475,000  
2030     500,000  
2031000     350,000  
Thereafter     2,050,000  
Total aggregate principal value     4,623,842  
Less: unamortized net discounts and deferred financing costs     (34,451)  
Total debt, net     4,589,391  
Kilroy Realty L.P. | Senior Notes        
Debt Instrument [Line Items]        
Unamortized discounts for the unsecured senior notes     (10,600)  
Kilroy Realty L.P. | Senior Notes | 4.300% Weighted-Average Private Placement Senior Notes | Subsequent Event        
Debt Instrument [Line Items]        
Total aggregate principal value $ 50,000      
Stated interest rate on debt (percent) 4.30%      
Kilroy Realty L.P. | Unsecured Senior Notes        
Debt Instrument [Line Items]        
Unamortized deferred financing costs     $ (23,800)