Preferred and Common Units of the Operating Partnership (Tables)

12 Months Ended

Dec. 31, 2015

Class of Stock [Line Items]

Schedule of Common Stock Sales Under the At-the-Market Offering

The following table sets forth information regarding sales of our common stock under our at-the-market offering programs for the years ended December 31, 2015, 2014 and 2013:

	Year Ended December 31,
	2015		2014		2013
	(in millions, except share data)
Shares of common stock sold during the period	1,866,267		1,599,123		1,040,838
Aggregate gross proceeds	$	140.1	$	104.7	$	55.3
Aggregate net proceeds after underwriting discounts	$	138.2	$	103.1	$	54.4

The proceeds from sales were used to fund acquisitions, development expenditures and general corporate purposes including repayment of borrowings under the unsecured revolving credit facility.

Redeemable Noncontrolling Interest [Table Text Block]

The following table sets forth the number of common units held by the Company and the number of common units held by non-affiliated investors and certain of our executive officers and directors in the form of noncontrolling common units as well as the ownership interest held on each respective date:

	December 31, 2015		December 31, 2014
Company owned common units in the Operating Partnership	92,258,690		86,259,684
Company owned general partnership interest	98.1	%	98.0	%
Noncontrolling common units of the Operating Partnership	1,764,775		1,804,200
Ownership interest of noncontrolling interest	1.9	%	2.0	%

For a further discussion of the noncontrolling common units during the years ended December 31, 2015 and 2014, refer to Note 10 “Noncontrolling Interests on the Company’s Consolidated Financial Statements”.

Schedule of Accrued Dividends and Distributions

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, 2015 and 2014:

	December 31,
	2015		2014
	(in thousands)
Dividends and Distributions payable to:
Common stockholders	$	32,291	$	30,191
Noncontrolling common unitholders of the Operating Partnership	618		631
RSU holders (1)	427		421
Total accrued dividends and distribution to common stockholders and noncontrolling unitholders	33,336		31,243
Preferred stockholders	1,656		1,656
Total accrued dividends and distributions	$	34,992	$	32,899

______________________

(1) The amount includes the value of the dividend equivalents that will be paid with additional RSUs (see Note 13 “Share-Based Compensation” for additional information)

Schedule of Outstanding Shares of Common Stock, Preferred Stock and Noncontrolling Units

	December 31,
	2015	2014
Outstanding Shares and Units:
Common stock (1)	92,258,690	86,259,684
Noncontrolling common units	1,764,775	1,804,200
RSUs (2)	1,269,809	1,248,352
Series G Preferred stock	4,000,000	4,000,000
Series H Preferred stock	4,000,000	4,000,000

______________________

(1) The amount includes nonvested shares.

(2) The amount includes nonvested RSUs. Does not include the 425,452 and 247,089 market measure-based RSUs because not all the necessary performance conditions have been met as of December 31, 2015 and2014, respectively.

Kilroy Realty, L.P. [Member]

Class of Stock [Line Items]

Schedule of Common Stock Sales Under the At-the-Market Offering

During the years ended December 31, 2015, 2014 and 2013, the Company utilized its at-the-market stock offering programs to issue shares of common stock (see Note 11 “Stockholders’ Equity of the Company” for additional information). The net offering proceeds and property acquired using net offering proceeds were contributed by the Company to the Operating Partnership in exchange for common units for the years ended December 31, 2015, 2014 and 2013 are as follows:

	Year Ended December 31,
	2015		2014		2013
	(in millions, except share and per share data)
Shares of common stock contributed by the Company	1,866,267		1,599,123		1,040,838
Common units exchanged for share of common stock by the Company	1,866,267		1,599,123		1,040,838
Aggregate gross proceeds	$	140.1	$	104.7	$	55.3
Aggregate net proceeds after underwriting discounts	$	138.2	$	103.1	$	54.4

Schedule of Accrued Dividends and Distributions

The following tables summarize accrued distributions for the noted common and preferred units as of December 31, 2015 and 2014:

	December 31, 2015		December 31, 2014
	(in thousands)
Distributions payable to:
General partner	$	32,291	$	30,191
Common limited partners	618		631
RSU holders (1)	427		421
Total accrued distributions to common unitholders	33,336		31,243
Preferred unitholders	1,656		1,656
Total accrued distributions	$	34,992	$	32,899

______________________

(1) The amount includes the value of the dividend equivalents that will be paid with additional RSUs (see Note 13 “Share-Based Compensation” for additional information).

Schedule of Outstanding Shares of Common Stock, Preferred Stock and Noncontrolling Units

	December 31, 2015	December 31, 2014
Outstanding Units:
Common units held by the general partner	92,258,690	86,259,684
Common units held by the limited partners	1,764,775	1,804,200
RSUs (1)	1,269,809	1,248,352
Series G Preferred units	4,000,000	4,000,000
Series H Preferred units	4,000,000	4,000,000

______________________

(1) Does not include the 425,452 and 247,089 market measure-based RSUs because not all the necessary performance conditions have been met as of December 31, 2015 and 2014, respectively.