Preferred and Common Units of the Operating Partnership (Tables)

12 Months Ended

Dec. 31, 2012

Class of Stock [Line Items]

Schedule of Dividends Payable [Table Text Block]

The following tables summarize accrued dividends and distributions for the noted outstanding shares of common stock, preferred stock, and noncontrolling units as of December 31, 2012 and 2011:

	December 31,
	2012		2011
	(in thousands)
Dividends and Distributions payable to:
Common stockholders	$	26,224	$	20,587
Noncontrolling common unitholders of the Operating Partnership	639		601
RSU holders (1)	367		295
Total accrued dividends and distribution to common stockholders and noncontrolling unitholders	27,230		21,483
Preferred stockholders	1,694		1,209
Total accrued dividends and distributions	$	28,924	$	22,692

______________________

(1) The amount includes the value of the dividend equivalents that will be paid with additional fully-vested RSUs (see Note 12)

Schedule of Stock by Class [Table Text Block]

	December 31,
	2012	2011
Outstanding Shares and Units:
Common stock (1)	74,926,981	58,819,717
Noncontrolling common units	1,826,503	1,718,131
RSUs (2)	1,048,863	842,675
Series E Preferred stock		1,610,000
Series F Preferred stock		3,450,000
Series G Preferred stock	4,000,000
Series H Preferred stock	4,000,000

______________________

(1) The amount includes nonvested shares.

(2) The amount includes nonvested RSUs.

Kilroy Realty, L.P. [Member]

Class of Stock [Line Items]

Schedule of Dividends Payable [Table Text Block]

The following tables summarize accrued distributions for the noted common and preferred units as of December 31, 2012 and 2011:

	December 31,
	2012		2011
	(in thousands)
Distributions payable to:
General partner	$	26,224	$	20,587
Common limited partners	639		601
RSU holders (1)	367		295
Total accrued distributions to common unitholders	27,230		21,483
Preferred unitholders	1,694		1,209
Total accrued distributions	$	28,924	$	22,692

______________________

(1) The amount includes the value of the dividend equivalents that will be paid with additional fully-vested RSUs (see Note 12).

Schedule of Stock by Class [Table Text Block]

	December 31,
	2012	2011
Outstanding Units:
Common units held by the general partner	74,926,981	58,819,717
Common units held by the limited partners	1,826,503	1,718,131
RSUs	1,048,863	842,675
Series E Preferred units		1,610,000
Series F Preferred units		3,450,000
Series G Preferred units	4,000,000
Series H Preferred units	4,000,000