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Consolidated Balance Sheets (KILROY REALTY, L.P.) (Parenthetical) (Kilroy Realty, L.P. [Member], USD $)
In Thousands, except Share data, unless otherwise specified
6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2011
Series E Cumulative Redeemable Preferred Stock
Dec. 31, 2010
Series E Cumulative Redeemable Preferred Stock
Jun. 30, 2011
Series F Cumulative Redeemable Preferred Stock
Dec. 31, 2010
Series F Cumulative Redeemable Preferred Stock
Partners' Capital (Note 8):            
Preferred stock dividend rate percentage     7.80% 7.80% 7.50% 7.50%
Preferred stock, shares outstanding     1,610,000 1,610,000 3,450,000 3,450,000
Preferred Stock Liquidation preference     $ 40,250 $ 40,250 $ 86,250 $ 86,250
General partner, units issued 58,464,412 52,349,670        
General partners, units outstanding 58,464,412 52,349,670        
Limited partners, units issued 1,718,131 1,723,131        
Limited partnership units outstanding 1,718,131 1,723,131