Consolidated Statements of Capital (KILROY REALTY, L.P.) (Parenthetical) (Kilroy Realty, L.P. [Member], USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Kilroy Realty, L.P. [Member]
Distributions declared per common unit	$ 0.35	$ 0.35