Consolidated Statements of Cash Fiows (Kilroy Realty, L.P.) (Parenthetical) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash paid for interest - capitalized interest amount	$ 33,533	$ 23,573
Kilroy Realty, L.P. [Member]
Cash paid for interest - capitalized interest amount	$ 33,533	$ 23,573