10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2015

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                  to                 

Commission File Number: 1-12675 (Kilroy Realty Corporation)

Commission File Number: 000-54005 (Kilroy Realty, L.P.)

KILROY REALTY CORPORATION

KILROY REALTY, L.P.

(Exact name of registrant as specified in its charter)

Kilroy Realty Corporation	Maryland	95-4598246
	(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
Kilroy Realty, L.P.	Delaware	95-4612685
	(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
12200 W. Olympic Boulevard, Suite 200, Los Angeles, California 90064
(Address of principal executive offices) (Zip Code)
(310) 481-8400
(Registrant's telephone number, including area code)
N/A
(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    

Kilroy Realty Corporation    Yes  þ    No   o

Kilroy Realty, L. P.         Yes  þ    No   o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    

Kilroy Realty Corporation     Yes  þ    No   o

Kilroy Realty, L.P.         Yes  þ    No   o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Kilroy Realty Corporation
Large accelerated filer     þ	Accelerated filer     o	Non-accelerated filer     o	Smaller reporting company     o
(Do not check if a smaller reporting company)
Kilroy Realty, L.P.
Large accelerated filer     o	Accelerated filer     o	Non-accelerated filer     þ	Smaller reporting company     o
(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    

Kilroy Realty Corporation Yes  o     No   þ

Kilroy Realty, L.P. Yes  o     No   þ

As of April 24, 2015, 88,052,069 shares of Kilroy Realty Corporation common stock, par value $.01 per share, were outstanding.

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the period ended March 31, 2015 of Kilroy Realty Corporation and Kilroy Realty, L.P. Unless stated otherwise or the context otherwise requires, references to “Kilroy Realty Corporation” or the “Company,” “we,” “our,” and “us” mean Kilroy Realty Corporation, a Maryland corporation, and its controlled and consolidated subsidiaries, and references to “Kilroy Realty, L.P.” or the “Operating Partnership” mean Kilroy Realty, L.P., a Delaware limited partnership, and its controlled and consolidated subsidiaries.

The Company is a real estate investment trust, or REIT, and the general partner of the Operating Partnership. As of March 31, 2015, the Company owned an approximate 98.0% common general partnership interest in the Operating Partnership. The remaining approximate 2.0% common limited partnership interests are owned by non-affiliated investors and certain directors and officers of the Company. As the sole general partner of the Operating Partnership, the Company exercises exclusive and complete discretion over the Operating Partnership’s day-to-day management and control and can cause it to enter into certain major transactions, including acquisitions, dispositions and refinancings, and cause changes in its line of business, capital structure and distribution policies.

There are a few differences between the Company and the Operating Partnership that are reflected in the disclosures in this Form 10-Q. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how the Company and the Operating Partnership operate as an interrelated, consolidated company. The Company is a REIT, the only material asset of which is the partnership interests it holds in the Operating Partnership. As a result, the Company generally does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing equity from time to time and guaranteeing certain debt of the Operating Partnership. The Company itself is not directly obligated under any indebtedness, but guarantees some of the debt of the Operating Partnership. The Operating Partnership owns substantially all of the assets of the Company either directly or through its subsidiaries, conducts the operations of the Company’s business and is structured as a limited partnership with no publicly traded equity. Except for net proceeds from equity issuances by the Company, which the Company generally contributes to the Operating Partnership in exchange for units of partnership interest, the Operating Partnership generates the capital required by the Company’s business through the Operating Partnership’s operations, by the Operating Partnership’s incurrence of indebtedness or through the issuance of units of partnership interest.

Noncontrolling interests and stockholders’ equity and partners’ capital are the main areas of difference between the consolidated financial statements of the Company and those of the Operating Partnership. The common limited partnership interests in the Operating Partnership are accounted for as partners’ capital in the Operating Partnership’s financial statements and, to the extent not held by the Company, as noncontrolling interests in the Company’s financial statements. The Operating Partnership’s financial statements reflect the noncontrolling interest in Kilroy Realty Finance Partnership, L.P., a Delaware limited partnership (the “Finance Partnership”). This noncontrolling interest represents the Company’s 1% indirect general partnership interest in the Finance Partnership, which is directly held by Kilroy Realty Finance, Inc., a wholly owned subsidiary of the Company. The differences between stockholders’ equity, partners’ capital and noncontrolling interests result from the differences in the equity issued by the Company and the Operating Partnership, and in the Operating Partnership’s noncontrolling interest in the Finance Partnership.

We believe combining the quarterly reports on Form 10-Q of the Company and the Operating Partnership into this single report results in the following benefits:

• Combined reports better reflect how management and the analyst community view the business as a single operating unit;

• Combined reports enhance investors’ understanding of the Company and the Operating Partnership by enabling them to view the business as a whole and in the same manner as management;

• Combined reports are more efficient for the Company and the Operating Partnership and result in savings in time, effort and expense; and

• Combined reports are more efficient for investors by reducing duplicative disclosure and providing a single document for their review.

To help investors understand the significant differences between the Company and the Operating Partnership, this report presents the following separate sections for each of the Company and the Operating Partnership:

• consolidated financial statements;

• the following notes to the consolidated financial statements:

◦ Note 8, Stockholders’ Equity of the Company;

◦ Note 9, Partners’ Capital of the Operating Partnership;

i

◦ Note 13, Net Income Available to Common Stockholders Per Share of the Company; and

◦ Note 14, Net Income Available to Common Unitholders Per Unit of the Operating Partnership;

• “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

◦ —Liquidity and Capital Resources of the Company;” and

◦ —Liquidity and Capital Resources of the Operating Partnership.”

This report also includes separate sections under Part I, Item 4. Controls and Procedures and separate Exhibit 31 and Exhibit 32 certifications for each of the Company and the Operating Partnership to establish that the Chief Executive Officer and the Chief Financial Officer of each entity have made the requisite certifications and that the Company and Operating Partnership are compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and 18 U.S.C. §1350.

ii

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

QUARTERLY REPORT FOR THE THREE MONTHS ENDED MARCH 31, 2015

TABLE OF CONTENTS

		Page
	PART I – FINANCIAL INFORMATION
Item 1.	FINANCIAL STATEMENTS OF KILROY REALTY CORPORATION	1
	Consolidated Balance Sheets as of March 31, 2015 (unaudited) and December 31, 2014	1
	Consolidated Statements of Operations for the Three Months ended March 31, 2015 and 2014 (unaudited)	2
	Consolidated Statements of Equity for the Three Months ended March 31, 2015 and 2014 (unaudited)	3
	Consolidated Statements of Cash Flows for the Three Months ended March 31, 2015 and 2014 (unaudited)	4
Item 1.	FINANCIAL STATEMENTS OF KILROY REALTY, L.P.	6
	Consolidated Balance Sheets as of March 31, 2015 (unaudited) and December 31, 2014	6
	Consolidated Statements of Operations for the Three Months ended March 31, 2015 and 2014 (unaudited)	7
	Consolidated Statements of Capital for the Three Months ended March 31, 2015 and 2014 (unaudited)	8
	Consolidated Statements of Cash Flows for the Three Months ended March 31, 2015 and 2014 (unaudited)	9
	Notes to Unaudited Consolidated Financial Statements	11
Item 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	27
Item 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	48
Item 4.	CONTROLS AND PROCEDURES (KILROY REALTY CORPORATION AND KILROY REALTY, L.P.)	48
	PART II – OTHER INFORMATION
Item 1.	LEGAL PROCEEDINGS	49
Item 1A.	RISK FACTORS	49
Item 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS	49
Item 3.	DEFAULTS UPON SENIOR SECURITIES	49
Item 4.	MINE SAFETY DISCLOSURES	49
Item 5.	OTHER INFORMATION	49
Item 6.	EXHIBITS	50
SIGNATURES		51

PART I – FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS (UNAUDITED) OF KILROY REALTY CORPORATION

KILROY REALTY CORPORATION

CONSOLIDATED BALANCE SHEETS

(in thousands, except share data)

	March 31, 2015			December 31, 2014
ASSETS	(unaudited)
REAL ESTATE ASSETS:
Land and improvements	$	838,927		$	877,633
Buildings and improvements	3,880,883			4,059,639
Undeveloped land and construction in progress (Note 2)	1,265,659			1,120,660
Total real estate assets held for investment	5,985,469			6,057,932
Accumulated depreciation and amortization	(921,279		)	(947,664		)
Total real estate assets held for investment, net ($171,120 and $211,755 of VIE, respectively, Note 1)	5,064,190			5,110,268
REAL ESTATE ASSETS AND OTHER ASSETS HELD FOR SALE, NET (Note 3)	190,751			8,211
CASH AND CASH EQUIVALENTS	50,181			23,781
RESTRICTED CASH (Note 1)	8,287			75,185
MARKETABLE SECURITIES (Note 12)	13,337			11,971
CURRENT RECEIVABLES, NET (Note 5)	8,122			7,229
DEFERRED RENT RECEIVABLES, NET (Note 5)	168,581			156,416
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Note 4)	182,251			201,926
DEFERRED FINANCING COSTS, NET	17,346			18,374
PREPAID EXPENSES AND OTHER ASSETS, NET	22,434			20,375
TOTAL ASSETS	$	5,725,480		$	5,633,736
LIABILITIES AND EQUITY
LIABILITIES:
Secured debt (Notes 6 and 12)	$	516,725		$	546,292
Unsecured debt, net (Notes 6 and 12)	1,783,280			1,783,121
Unsecured line of credit (Notes 6 and 12)	130,000			140,000
Accounts payable, accrued expenses and other liabilities	217,352			225,830
Accrued distributions (Note 15)	33,532			32,899
Deferred revenue and acquisition-related intangible liabilities, net (Note 4)	128,730			132,239
Rents received in advance and tenant security deposits	46,887			49,363
Liabilities of real estate assets held for sale (Note 3)	9,768			56
Total liabilities	2,866,274			2,909,800
COMMITMENTS AND CONTINGENCIES (Note 11)
EQUITY:
Stockholders’ Equity (Note 8):
Preferred stock, $.01 par value, 30,000,000 shares authorized:
6.875% Series G Cumulative Redeemable Preferred stock, $.01 par value, 4,600,000 shares authorized, 4,000,000 shares issued and outstanding ($100,000 liquidation preference)	96,155			96,155
6.375% Series H Cumulative Redeemable Preferred stock, $.01 par value, 4,000,000 shares authorized, issued and outstanding ($100,000 liquidation preference)	96,256			96,256
Common stock, $.01 par value, 150,000,000 shares authorized, 88,031,377 and 86,259,684 shares issued and outstanding, respectively	880			863
Additional paid-in capital	2,761,176			2,635,900
Distributions in excess of earnings	(154,355		)	(162,964		)
Total stockholders’ equity	2,800,112			2,666,210
Noncontrolling Interests:
Common units of the Operating Partnership (Note 7)	53,232			51,864
Noncontrolling interest in consolidated subsidiary (Note 1)	5,862			5,862
Total noncontrolling interests	59,094			57,726
Total equity	2,859,206			2,723,936
TOTAL LIABILITIES AND EQUITY	$	5,725,480		$	5,633,736

See accompanying notes to consolidated financial statements.

1

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited; in thousands, except share and per share data)

	Three Months Ended March 31,
	2015			2014
REVENUES
Rental income	$	130,932		$	110,098
Tenant reimbursements	14,425			11,519
Other property income	725			2,141
Total revenues	146,082			123,758
EXPENSES
Property expenses	24,714			24,483
Real estate taxes	12,715			10,989
Provision for bad debts	242			—
Ground leases	776			762
General and administrative expenses	12,768			10,811
Acquisition-related expenses	128			228
Depreciation and amortization	51,487			48,536
Total expenses	102,830			95,809
OTHER (EXPENSES) INCOME
Interest income and other net investment gains (Note 12)	360			177
Interest expense (Note 6)	(16,878		)	(17,252		)
Total other (expenses) income	(16,518		)	(17,075		)
INCOME FROM CONTINUING OPERATIONS BEFORE GAINS ON SALE OF REAL ESTATE	26,734			10,874
Gain on sale of land (Note 3)	17,268			—
INCOME FROM CONTINUING OPERATIONS	44,002			10,874
DISCONTINUED OPERATIONS (Note 1)
Income from discontinued operations	—			943
Gains on dispositions of discontinued operations	—			90,115
Total income from discontinued operations	—			91,058
NET INCOME	44,002			101,932
Net income attributable to noncontrolling common units of the Operating Partnership	(815		)	(2,087		)
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION	43,187			99,845
PREFERRED DIVIDENDS	(3,313		)	(3,313		)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$	39,874		$	96,532
Income from continuing operations available to common stockholders per common share – basic (Note 13)	$	0.45		$	0.08
Income from continuing operations available to common stockholders per common share – diluted (Note 13)	$	0.45		$	0.08
Net income available to common stockholders per share – basic (Note 13)	$	0.45		$	1.17
Net income available to common stockholders per share – diluted (Note 13)	$	0.45		$	1.14
Weighted average common shares outstanding – basic (Note 13)	86,896,776			82,124,538
Weighted average common shares outstanding – diluted (Note 13)	87,434,366			84,140,070
Dividends declared per common share	$	0.35		$	0.35

See accompanying notes to consolidated financial statements.

2

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF EQUITY

(Unaudited; in thousands, except share and per share/unit data)

			Common Stock										Total Stock- holders’ Equity			Noncontrolling Interests			Total Equity
	Preferred Stock		Number of Shares		Common Stock		Additional Paid-in Capital			Distributions in Excess of Earnings
BALANCE AS OF DECEMBER 31, 2013	$	192,411	82,153,944		$	822	$	2,478,975		$	(210,896	)	$	2,461,312		$	54,848		$	2,516,160
Net income										99,845			99,845			2,087			101,932
Noncash amortization of share-based compensation							2,233						2,233						2,233
Repurchase of common stock, stock options and restricted stock units			(26,074	)			(1,517		)				(1,517		)				(1,517		)
Settlement of restricted stock units for shares of common stock			88,962				—						—						—
Exercise of stock options			500				21						21						21
Exchange of common units of the Operating Partnership			1,000				28						28			(28		)	—
Preferred dividends										(3,313		)	(3,313		)				(3,313		)
Dividends declared per common share and common unit ($0.35 per share/unit)										(29,272		)	(29,272		)	(634		)	(29,906		)
BALANCE AS OF MARCH 31, 2014	$	192,411	82,218,332		$	822	$	2,479,740		$	(143,636	)	$	2,529,337		$	56,273		$	2,585,610

			Common Stock											Total Stock- holders’ Equity			Noncontrolling Interests			Total Equity
	Preferred Stock			Number of Shares		Common Stock		Additional Paid-in Capital			Distributions in Excess of Earnings
BALANCE AS OF DECEMBER 31, 2014	$	192,411		86,259,684		$	863	$	2,635,900		$	(162,964	)	$	2,666,210		$	57,726		$	2,723,936
Net income											43,187			43,187			815			44,002
Issuance of common stock (Note 8)				1,507,393		15		113,082						113,097						113,097
Issuance of share-based compensation awards								413						413						413
Noncash amortization of share-based compensation								4,302						4,302						4,302
Repurchase of common stock, stock options and restricted stock units				(20,429	)			(1,821		)				(1,821		)				(1,821		)
Settlement of restricted stock units for shares of common stock				36,699				—						—						—
Exercise of stock options (Note 10)				237,000		2		10,480						10,482						10,482
Exchange of common units of the Operating Partnership				11,030				316						316			(316		)	—
Adjustment for noncontrolling interest								(1,496		)				(1,496		)	1,496			—
Preferred dividends											(3,313		)	(3,313		)				(3,313		)
Dividends declared per common share and common unit ($0.35 per share/unit)											(31,265		)	(31,265		)	(627		)	(31,892		)
BALANCE AS OF MARCH 31, 2015	$	192,411		88,031,377		$	880	$	2,761,176		$	(154,355	)	$	2,800,112		$	59,094		$	2,859,206

See accompanying notes to consolidated financial statements.

3

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited; in thousands)

	Three Months Ended March 31,
	2015			2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	44,002		$	101,932
Adjustments to reconcile net income to net cash provided by operating activities (including discontinued operations):
Depreciation and amortization of building and improvements and leasing costs	50,843			48,717
Increase in provision for bad debts	242			—
Depreciation of furniture, fixtures and equipment	644			485
Noncash amortization of share-based compensation awards	3,571			2,502
Noncash amortization of deferred financing costs and debt discounts and premiums	454			1,256
Noncash amortization of net below market rents (Note 4)	(1,928		)	(1,734		)
Gain on sale of land (Note 3)	(17,268		)	—
Gains on dispositions of discontinued operations	—			(90,115		)
Noncash amortization of deferred revenue related to tenant-funded tenant improvements	(3,013		)	(2,353		)
Straight-line rents	(19,692		)	(3,959		)
Net change in other operating assets	(8,421		)	(5,949		)
Net change in other operating liabilities	5,545			(5,701		)
Net cash provided by operating activities	54,979			45,081
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development and redevelopment properties and undeveloped land	(89,810		)	(73,626		)
Expenditures for acquisition of development properties (Note 2)	(50,435		)	—
Expenditures for operating properties	(24,345		)	(32,016		)
Expenditures for acquisition of operating properties	—			(106,125		)
Net proceeds received from dispositions of land and operating properties (Note 3)	25,563			309,824
Decrease in acquisition-related deposits	3,099			—
Decrease (increase) in restricted cash (Note 1)	58,619			(779		)
Net cash (used in) provided by investing activities	(77,309		)	97,278
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock (Note 8)	113,097			—
Borrowings on unsecured line of credit	150,000			90,000
Repayments on unsecured line of credit	(160,000		)	(135,000		)
Principal payments on secured debt	(28,472		)	(2,414		)
Financing costs	(397		)	(418		)
Repurchase of common stock and restricted stock units	(1,821		)	(1,517		)
Proceeds from exercise of stock options (Note 10)	10,482			21
Dividends and distributions paid to common stockholders and common unitholders	(30,846		)	(29,561		)
Dividends and distributions paid to preferred stockholders and preferred unitholders	(3,313		)	(3,313		)
Net cash provided by (used in) financing activities	48,730			(82,202		)
Net increase in cash and cash equivalents	26,400			60,157
Cash and cash equivalents, beginning of period	23,781			35,377
Cash and cash equivalents, end of period	$	50,181		$	95,534

4

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS – (Continued)

(Unaudited; in thousands)

	Three Months Ended March 31,
	2015		2014
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of$10,669and $10,042 as of March 31, 2015 and 2014, respectively	$	19,814	$	14,106
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	$	85,656	$	64,709
Tenant improvements funded directly by tenants	$	231	$	4,470
Assumption of other liabilities in connection with development acquisitions	$	1,478	$	—
Release of holdback funds to third party	$	8,279	$	—
NONCASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders	$	31,892	$	29,906
Accrual of dividends and distributions payable to preferred stockholders and preferred unitholders	$	1,656	$	1,656
Fair value of share-based compensation awards at equity classification date (Note 10)	$	16,920	$	—
Exchange of common units of the Operating Partnership into shares of the Company’s common stock	$	316	$	28

See accompanying notes to consolidated financial statements.

5

ITEM 1: FINANCIAL STATEMENTS (UNAUDITED) OF KILROY REALTY, L.P.

KILROY REALTY, L.P.

CONSOLIDATED BALANCE SHEETS

(in thousands, except unit data)

	March 31, 2015			December 31, 2014
ASSETS	(unaudited)
REAL ESTATE ASSETS:
Land and improvements	$	838,927		$	877,633
Buildings and improvements	3,880,883			4,059,639
Undeveloped land and construction in progress (Note 2)	1,265,659			1,120,660
Total real estate assets held for investment	5,985,469			6,057,932
Accumulated depreciation and amortization	(921,279		)	(947,664		)
Total real estate assets held for investment, net ($171,120 and $211,755 of VIE, respectively, Note 1)	5,064,190			5,110,268
REAL ESTATE ASSETS AND OTHER ASSETS HELD FOR SALE, NET (Note 3)	190,751			8,211
CASH AND CASH EQUIVALENTS	50,181			23,781
RESTRICTED CASH (Note 1)	8,287			75,185
MARKETABLE SECURITIES (Note 12)	13,337			11,971
CURRENT RECEIVABLES, NET (Note 5)	8,122			7,229
DEFERRED RENT RECEIVABLES, NET (Note 5)	168,581			156,416
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Note 4)	182,251			201,926
DEFERRED FINANCING COSTS, NET	17,346			18,374
PREPAID EXPENSES AND OTHER ASSETS, NET	22,434			20,375
TOTAL ASSETS	$	5,725,480		$	5,633,736
LIABILITIES AND CAPITAL
LIABILITIES:
Secured debt (Notes 6 and 12)	$	516,725		$	546,292
Unsecured debt, net (Notes 6 and 12)	1,783,280			1,783,121
Unsecured line of credit (Notes 6 and 12)	130,000			140,000
Accounts payable, accrued expenses and other liabilities	217,352			225,830
Accrued distributions (Note 15)	33,532			32,899
Deferred revenue and acquisition-related intangible liabilities, net (Note 4)	128,730			132,239
Rents received in advance and tenant security deposits	46,887			49,363
Liabilities of real estate assets held for sale (Note 3)	9,768			56
Total liabilities	2,866,274			2,909,800
COMMITMENTS AND CONTINGENCIES (Note 11)
CAPITAL:
Partners’ Capital (Note 9):
6.875% Series G Cumulative Redeemable Preferred units, 4,000,000 units issued and outstanding ($100,000 liquidation preference)	96,155			96,155
6.375% Series H Cumulative Redeemable Preferred units, 4,000,000 units issued and outstanding ($100,000 liquidation preference)	96,256			96,256
Common units, 88,031,377 and 86,259,684 held by the general partner and 1,793,170 and 1,804,200 held by common limited partners issued and outstanding, respectively	2,657,095			2,521,900
Total partners’ capital	2,849,506			2,714,311
Noncontrolling interests in consolidated subsidiaries (Note 1)	9,700			9,625
Total capital	2,859,206			2,723,936
TOTAL LIABILITIES AND CAPITAL	$	5,725,480		$	5,633,736

See accompanying notes to consolidated financial statements.

6

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited; in thousands, except unit and per unit data)

	Three Months Ended March 31,
	2015			2014
REVENUES
Rental income	$	130,932		$	110,098
Tenant reimbursements	14,425			11,519
Other property income	725			2,141
Total revenues	146,082			123,758
EXPENSES
Property expenses	24,714			24,483
Real estate taxes	12,715			10,989
Provision for bad debts	242			—
Ground leases	776			762
General and administrative expenses	12,768			10,811
Acquisition-related expenses	128			228
Depreciation and amortization	51,487			48,536
Total expenses	102,830			95,809
OTHER (EXPENSES) INCOME
Interest income and other net investment gains (Note 12)	360			177
Interest expense (Note 6)	(16,878		)	(17,252		)
Total other (expenses) income	(16,518		)	(17,075		)
INCOME FROM CONTINUING OPERATIONS BEFORE GAINS ON SALE OF REAL ESTATE	26,734			10,874
Gain on sale of land (Note 3)	17,268			—
INCOME FROM CONTINUING OPERATIONS	44,002			10,874
DISCONTINUED OPERATIONS (Note 1)
Income from discontinued operations	—			943
Gains on dispositions of discontinued operations	—			90,115
Total income from discontinued operations	—			91,058
NET INCOME	44,002			101,932
Net income attributable to noncontrolling interests in consolidated subsidiaries	(75		)	(65		)
NET INCOME ATTRIBUTABLE TO KILROY REALTY, L.P.	43,927			101,867
PREFERRED DISTRIBUTIONS	(3,313		)	(3,313		)
NET INCOME AVAILABLE TO COMMON UNITHOLDERS	$	40,614		$	98,554
Income from continuing operations available to common unitholders per unit – basic (Note 14)	$	0.45		$	0.08
Income from continuing operations available to common unitholders per unit – diluted (Note 14)	$	0.45		$	0.08
Net income available to common unitholders per unit – basic (Note 14)	$	0.45		$	1.17
Net income available to common unitholders per unit – diluted (Note 14)	$	0.45		$	1.14
Weighted average common units outstanding – basic (Note 14)	88,693,306			83,928,993
Weighted average common units outstanding – diluted (Note 14)	89,230,896			85,944,525
Dividends declared per common unit	$	0.35		$	0.35

See accompanying notes to consolidated financial statements.

7

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF CAPITAL

(Unaudited; in thousands, except unit and per unit data)

	Partners’ Capital							Total Partners’ Capital			Noncontrolling Interests in Consolidated Subsidiaries
	Preferred Units		Number of Common Units		Common Units								Total Capital
BALANCE AS OF DECEMBER 31, 2013	$	192,411	83,959,144		$	2,315,361		$	2,507,772		$	8,388	$	2,516,160
Net income					101,867			101,867			65		101,932
Noncash amortization of share-based compensation					2,233			2,233					2,233
Repurchase of common units, stock options and restricted stock units			(26,074	)	(1,517		)	(1,517		)			(1,517		)
Settlement of restricted stock units			88,962		—			—					—
Exercise of stock options			500		21			21					21
Preferred distributions					(3,313		)	(3,313		)			(3,313		)
Distributions declared per common unit ($0.35 per unit)					(29,906		)	(29,906		)			(29,906		)
BALANCE AS OF MARCH 31, 2014	$	192,411	84,022,532		$	2,384,746		$	2,577,157		$	8,453	$	2,585,610

	Partners’ Capital							Total Partners’ Capital			Noncontrolling Interests in Consolidated Subsidiaries
	Preferred Units		Number of Common Units		Common Units								Total Capital
BALANCE AS OF DECEMBER 31, 2014	$	192,411	88,063,884		$	2,521,900		$	2,714,311		$	9,625	$	2,723,936
Net income					43,927			43,927			75		44,002
Issuance of common units (Note 9)			1,507,393		113,097			113,097					113,097
Issuance of share-based compensation awards					413			413					413
Noncash amortization of share-based compensation					4,302			4,302					4,302
Repurchase of common units, stock options and restricted stock units			(20,429	)	(1,821		)	(1,821		)			(1,821		)
Settlement of restricted stock units			36,699		—			—					—
Exercise of stock options (Note 10)			237,000		10,482			10,482					10,482
Preferred distributions					(3,313		)	(3,313		)			(3,313		)
Distributions declared per common unit ($0.35 per unit)					(31,892		)	(31,892		)			(31,892		)
BALANCE AS OF MARCH 31, 2015	$	192,411	89,824,547		$	2,657,095		$	2,849,506		$	9,700	$	2,859,206

See accompanying notes to consolidated financial statements.

8

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited; in thousands)

	Three Months Ended March 31,
	2015			2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	44,002		$	101,932
Adjustments to reconcile net income to net cash provided by operating activities  (including discontinued operations):
Depreciation and amortization of building and improvements and leasing costs	50,843			48,717
Increase in provision for bad debts	242			—
Depreciation of furniture, fixtures and equipment	644			485
Noncash amortization of share-based compensation awards	3,571			2,502
Noncash amortization of deferred financing costs and debt discounts and premiums	454			1,256
Noncash amortization of net below market rents (Note 4)	(1,928		)	(1,734		)
Gain on sale of land (Note 3)	(17,268		)	—
Gains on dispositions of discontinued operations	—			(90,115		)
Noncash amortization of deferred revenue related to tenant-funded tenant improvements	(3,013		)	(2,353		)
Straight-line rents	(19,692		)	(3,959		)
Net change in other operating assets	(8,421		)	(5,949		)
Net change in other operating liabilities	5,545			(5,701		)
Net cash provided by operating activities	54,979			45,081
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development and redevelopment properties and undeveloped land	(89,810		)	(73,626		)
Expenditures for acquisition of development properties (Note 2)	(50,435		)	—
Expenditures for operating properties	(24,345		)	(32,016		)
Expenditures for acquisition of operating properties	—			(106,125		)
Net proceeds received from dispositions of land and operating properties (Note 3)	25,563			309,824
Decrease in acquisition-related deposits	3,099			—
Decrease (increase) in restricted cash (Note 1)	58,619			(779		)
Net cash (used in) provided by investing activities	(77,309		)	97,278
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock (Note 8)	113,097			—
Borrowings on unsecured line of credit	150,000			90,000
Repayments on unsecured line of credit	(160,000		)	(135,000		)
Principal payments on secured debt	(28,472		)	(2,414		)
Financing costs	(397		)	(418		)
Repurchase of common stock and restricted stock units	(1,821		)	(1,517		)
Proceeds from exercise of stock options (Note 10)	10,482			21
Dividends and distributions paid to common stockholders and common unitholders	(30,846		)	(29,561		)
Dividends and distributions paid to preferred stockholders and preferred unitholders	(3,313		)	(3,313		)
Net cash provided by (used in) financing activities	48,730			(82,202		)
Net increase in cash and cash equivalents	26,400			60,157
Cash and cash equivalents, beginning of period	23,781			35,377
Cash and cash equivalents, end of period	$	50,181		$	95,534

9

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS – (Continued)

(Unaudited; in thousands)

	Three Months Ended March 31,
	2015		2014
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $10,669 and $10,042 as of March 31, 2015 and 2014, respectively	$	19,814	$	14,106
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	$	85,656	$	64,709
Tenant improvements funded directly by tenants	$	231	$	4,470
Assumption of other liabilities in connection with development acquisitions	$	1,478	$	—
Release of holdback funds to third party	$	8,279	$	—
NONCASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common unitholders	$	31,892	$	29,906
Accrual of dividends and distributions payable to preferred unitholders	$	1,656	$	1,656
Fair value of share-based compensation awards at equity classification date (Note 10)	$	16,920	$	—

See accompanying notes to consolidated financial statements.

10

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

Three Months Ended March 31, 2015 and 2014

1.    Organization and Basis of Presentation

Organization

Kilroy Realty Corporation (the “Company”) is a self-administered real estate investment trust (“REIT”) active in premier office submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Los Angeles, Orange County, San Diego County, the San Francisco Bay Area and greater Seattle, which we believe have strategic advantages and strong barriers to entry. Class A real estate encompasses attractive and efficient buildings of high quality that are attractive to tenants, are well-designed and constructed with above-average material, workmanship and finishes and are well-maintained and managed. We qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). The Company’s common stock is publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “KRC.”

We own our interests in all of our real estate assets through Kilroy Realty, L.P. (the “Operating Partnership”) and Kilroy Realty Finance Partnership, L.P. (the “Finance Partnership”). We generally conduct substantially all of our operations through the Operating Partnership. Unless stated otherwise or the context indicates otherwise, the terms “Kilroy Realty Corporation” or the “Company,” “we,” “our,” and “us” refer to Kilroy Realty Corporation and its consolidated subsidiaries and the term “Operating Partnership” refers to Kilroy Realty, L.P. and its consolidated subsidiaries. The descriptions of our business, employees, and properties apply to both the Company and the Operating Partnership.

Our stabilized portfolio of operating properties was comprised of the following office properties at March 31, 2015:

	Number of Buildings	Rentable Square Feet	Number of Tenants	Percentage  Occupied
Stabilized Office Properties	101	13,047,720	515	96.1	%

Our stabilized portfolio includes all of our properties with the exception of development and redevelopment properties currently under construction or committed for construction, “lease-up” properties, real estate assets held for sale and undeveloped land. We define redevelopment properties as those properties for which we expect to spend significant development and construction costs on the existing or acquired buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. As of March 31, 2015, we had no redevelopment properties. We define “lease-up” properties as properties we recently developed or redeveloped that have not yet reached 95% occupancy and are within one year following cessation of major construction activities. There were no operating properties in “lease-up” as of March 31, 2015.

As of March 31, 2015, the following properties were excluded from our stabilized portfolio:

	Number of Properties/Projects	Estimated Rentable Square Feet
Properties held for sale (1)	10	1,044,844
Development projects under construction (2)	6	1,732,000

_______________

(1) Includes one property located in Redmond, Washington and nineproperties located in the Sorrento Mesa/UTC submarkets of San Diego, California. For additional information see Note 3.

(2) Estimated rentable square feet upon completion.

Our stabilized portfolio also excludes our future development pipeline, which is comprised of ten potential development sites, representing approximately 106 gross acres of undeveloped land.

As of March 31, 2015, all of our stabilized portfolio properties and development projects were owned and all of our business was conducted in the state of California with the exception of twelve office properties and a recently acquired development opportunity located in the state of Washington. All of our properties and development projects are 100% owned, excluding a development project owned by Redwood City Partners, LLC (“Redwood LLC”), a consolidated subsidiary (seeNote 1) and certain properties held at qualified intermediaries for potential future transactions that are intended to qualify as like-kind exchanges pursuant to Section 1031 of the Code (“Section 1031 Exchanges”) to defer taxable gains on dispositions for federal and state income tax purposes, which have been consolidated for financial reporting purposes.

11

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

As of March 31, 2015, the Company owned an approximate 98.0% common general partnership interest in the Operating Partnership. The remaining approximate 2.0% common limited partnership interest in the Operating Partnership as of March 31, 2015 was owned by non-affiliated investors and certain of our executive officers and directors (see Note 7). Both the general and limited common partnership interests in the Operating Partnership are denominated in common units. Generally, the number of common units held by the Company is equivalent to the number of outstanding shares of the Company’s common stock, and the rights of all the common units to quarterly distributions and payments in liquidation mirror those of the Company’s common stockholders. The common limited partners have certain redemption rights as provided in the Operating Partnership’s Seventh Amended and Restated Agreement of Limited Partnership, as amended, the “Partnership Agreement” (see Note 7).

Kilroy Realty Finance, Inc., which is a wholly owned subsidiary of the Company, is the sole general partner of the Finance Partnership and owns a 1.0% common general partnership interest in the Finance Partnership. The Operating Partnership owns the remaining 99.0% common limited partnership interest. Kilroy Services, LLC (“KSLLC”), which is a wholly owned subsidiary of the Operating Partnership, is the entity through which we generally conduct substantially all of our development activities. With the exception of the Operating Partnership and Redwood LLC, all of our subsidiaries are wholly owned.

Basis of Presentation

The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, the Finance Partnership, KSLLC, Redwood LLC and all of our wholly owned and controlled subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, the Finance Partnership, KSLLC, Redwood LLC and all wholly-owned and controlled subsidiaries of the Operating Partnership. All intercompany balances and transactions have been eliminated in the consolidated financial statements.

The accompanying interim financial statements have been prepared by management in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in conjunction with the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the interim financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements reflect all adjustments of a normal and recurring nature that are considered necessary for a fair presentation of the results for the interim periods presented. However, the results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2015. The interim financial statements for the Company and the Operating Partnership should be read in conjunction with the audited consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014.

Certain amounts in the consolidated statements of operations for prior periods have been reclassified to reflect the activity of discontinued operations disposed of prior to the Company's adoption of Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2014-08 (“ASU 2014-08”). Properties classified as held for sale and/or disposed of prior to January 1, 2015 are presented as discontinued operations for all periods presented.

Variable Interest Entities

At March 31, 2015, the consolidated financial statements of the Company and the Operating Partnership included two variable interest entities (“VIEs”), in which we were deemed to be the primary beneficiary. One VIE, Redwood LLC, was established in the second quarter of 2013 in connection with an undeveloped land acquisition. The other VIE was established during the first quarter of 2015 to facilitate potential future Section 1031 Exchanges to defer taxable gains on dispositions for federal and state income tax purposes. The impact of consolidating the VIEs increased the Company’s total assets, liabilities and noncontrolling interests by approximately $173.0 million (of which $171.1 million related to real estate held for investment on our consolidated balance sheet), approximately $16.5 million and approximately $5.9 million, respectively, as of March 31, 2015.

As of December 31, 2014, the consolidated financial statements of the Company and the Operating Partnership included two VIEs, in which we were deemed to be the primary beneficiary. One of the VIEs was Redwood LLC and the remaining VIE was established during the fourth quarter of 2014 to facilitate potential Section 1031 Exchanges. During the three months ended March 31, 2015, the Section 1031 Exchange was successfully completed and the VIE was terminated. As a result, $59.2 million of our restricted cash balance at December 31, 2014, which related to prior period disposition proceeds that were set aside to facilitate the Section 1031 Exchange, was released from escrow. The impact of consolidating the VIEs increased the Company’s total assets, liabilities and noncontrolling interests by approximately $219.6 million (of which $211.8 million related to real estate held for

12

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

investment on our consolidated balance sheet), approximately $23.4 million and approximately 5.9 million, respectively, as of December 31, 2014.

Adoption of New Accounting Pronouncements

Effective January 1, 2015, the Company adopted FASB ASU 2014-08, which changed the criteria for reporting discontinued operations while enhancing disclosures in this area. Under the new guidance, only disposals representing a strategic shift that has (or will have) a major effect on an entity's operations and final results, such as a major line of business, a major geographical area or a major equity investment, should be presented as discontinued operations. The Company adopted and applied the new guidance on a prospective basis as required by ASU 2014-08. Therefore, real estate assets classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift will be presented in continuing operations for all periods presented. Properties classified as held for sale and/or disposed of prior to January 1, 2015 will continue to be presented in discontinued operations for prior periods presented. In accordance with this guidance, the operations of the ten properties held for sale at March 31, 2015 are presented in continuing operations for the three months ended March 31, 2015. For the three months ended March 31, 2014, discontinued operations includes the income and gains on all of the properties sold in 2014.

Recently Issued Accounting Pronouncements

On April 7, 2015 the FASB issued ASU No. 2015-03 (“ASU 2015-03”) to amend the accounting guidance for the presentation of debt issuance costs. The standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. ASU 2015-03 is effective for public business entities for fiscal years beginning after December 15, 2015 and retrospective application is required. Early adoption of the guidance is permitted. The Company expects to adopt the guidance effective January 1, 2016 and the guidance is not anticipated to have a material impact on our consolidated financial statements or notes to our consolidated financial statements.

On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however if the proposed deferral is approved, adoption is required for annual reporting periods beginning after December 15, 2017. The Company is currently assessing the impact of the guidance on our consolidated financial statements or notes to our consolidated financial statements.

On February 18, 2015 the FASB issued ASU No. 2015-02 (“ASU 2015-02”) to amend the accounting guidance for consolidation. The standard simplifies the current guidance for consolidation and reduces the number of consolidation models through the elimination of the indefinite deferral of Statement 167. Additionally, the standard places more emphasis on risk of loss when determining a controlling financial interest. ASU 2015-02 is effective for all entities for reporting periods (including interim periods) beginning after December 15, 2015, and early adoption is permitted. The Company expects to adopt the guidance effective January 1, 2016 and the guidance is not anticipated to have a material impact on our consolidated financial statements or notes to our consolidated financial statements.

13

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

2.    Acquisitions

Development Project Acquisitions

During the threemonths ended March 31, 2015, we acquired the development opportunity listed below from an unrelated third party. The acquisition was funded with proceeds from the Company’s at-the-market stock offering program (see Note 8) and prior year disposition proceeds.

Project	Date of Acquisition	Type	Purchase Price (in millions)
333 Dexter (1)(2)	February 13, 2015	Land	$	49.5

_______________

(1) Acquisition comprised of four adjacent parcels in the South Lake Union submarket of Seattle, Washington located at 330 Dexter Avenue North, 333 Dexter Avenue North, 401 Dexter Avenue North, and 400 Aurora Avenue North.

(2) In connection with this acquisition, we also assumed $2.4 million in accrued liabilities and acquisition costs which are not included in the purchase price above. As of March 31, 2015, the underlying assets were included as undeveloped land and construction in progress in our consolidated balance sheets.

3.    Real Estate Assets Held for Sale and Dispositions

Real Estate Assets Held for Sale

As ofMarch 31, 2015, the following operating properties were classified as held for sale:

Location	City/Submarket	Property Type	Number of Buildings	Rentable Square Feet
15050 NE 36th Street	Redmond, WA	Office	1	122,103
San Diego Properties (1)	Sorrento Mesa, CA	Office	9	922,741
Total properties held for sale			10	1,044,844

________________________ 

(1) The San Diego Properties include the following: 6260 Sequence Drive, 6290 Sequence Drive, 6310 Sequence Drive, 6340 Sequence Drive, 6350 Sequence Drive, 10770 Wateridge Circle, 4921 Directors Place, 6200 Greenwich Drive, and 6220 Greenwich Drive. The properties are being sold in two tranches. The Company completed the sale of the first tranche for gross proceeds of approximately $95.0 million on April 15, 2015.

The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, the ten properties held for sale at March 31, 2015 are included in continuing operations for all periods presented.

The major classes of assets and liabilities of the properties held for sale as of March 31, 2015 were as follows:

Real estate assets and other assets held for sale	(in thousands)
Land and improvements	$	38,706
Buildings and improvements	198,125
Total real estate held for sale	236,831
Accumulated depreciation and amortization	(66,421		)
Total real estate held for sale, net	170,410
Current receivables, net	185
Deferred rent receivables, net	7,285
Deferred leasing costs and acquisition-related intangible assets, net	12,364
Prepaid expenses and other assets, net	507
Real estate and other assets held for sale, net	$	190,751
Liabilities and deferred revenue of real estate assets held for sale
Accounts payable, accrued expenses and other liabilities	$	7,376
Deferred revenue and acquisition-related intangible liabilities, net	1,367
Rents received in advance and tenant security deposits	1,025
Liabilities and deferred revenue of real estate assets held for sale	$	9,768

Land Disposition

During the threemonths ended March 31, 2015, the Company sold a land parcel located at 17150 Von Karman in Irvine, California for a gross sales price of $26.0 million, resulting in a gain on sale of $17.3 million.

14

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

4.    Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net

The following table summarizes our deferred leasing costs and acquisition-related intangible assets (acquired value of leasing costs, above-market operating leases, in-place leases and below-market ground lease obligation) and intangible liabilities (acquired value of below-market operating leases and above-market ground lease obligation) as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Deferred Leasing Costs and Acquisition-Related Intangible Assets, net: (1)
Deferred leasing costs	$	201,548		$	216,102
Accumulated amortization	(74,864		)	(74,904		)
Deferred leasing costs, net	126,684			141,198
Above-market operating leases	19,194			20,734
Accumulated amortization	(13,323		)	(13,952		)
Above-market operating leases, net	5,871			6,782
In-place leases	93,222			97,250
Accumulated amortization	(43,993		)	(43,773		)
In-place leases, net	49,229			53,477
Below-market ground lease obligation	490			490
Accumulated amortization	(23		)	(21		)
Below-market ground lease obligation, net	467			469
Total deferred leasing costs and acquisition-related intangible assets, net	$	182,251		$	201,926
Acquisition-Related Intangible Liabilities, net: (1) (2)
Below-market operating leases	$	64,792		$	68,051
Accumulated amortization	(30,222		)	(30,620		)
Below-market operating leases, net	34,570			37,431
Above-market ground lease obligation	6,320			6,320
Accumulated amortization	(349		)	(324		)
Above-market ground lease obligation, net	5,971			5,996
Total acquisition-related intangible liabilities, net	$	40,541		$	43,427

_______________

(1) Excludes deferred leasing costs and acquisition-related intangible assets and liabilities related to properties held for sale at March 31, 2015.

(2) Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

The following table sets forth amortization related to deferred leasing costs and acquisition-related intangibles, including amounts attributable to discontinued operations, for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands)
Deferred leasing costs (1)	$	6,822		$	6,780
Above-market operating leases (2)	911			1,490
In-place leases (1)	4,221			6,136
Below-market ground lease obligation (3)	2			—
Below-market operating leases (4)	(2,839		)	(3,093		)
Above-market ground lease obligation (5)	(25		)	(25		)
Total	$	9,092		$	11,288

_______________

(1) The amortization of deferred leasing costs related to lease incentives is recorded to rental income and other deferred leasing costs and in-place leases is recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.

(2) The amortization of above-market operating leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.

(3) The amortization of the below-market ground lease obligation is recorded as an increase to ground lease expense in the consolidated statements of operations for the periods presented.

(4) The amortization of below-market operating leases is recorded as an increase to rental income in the consolidated statements of operations for the periods presented.

(5) The amortization of the above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

15

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The following table sets forth the estimated annual amortization expense related to deferred leasing costs and acquisition-related intangibles as of March 31, 2015 for future periods:

Year	Deferred Leasing Costs		Above-Market Operating Leases (1)		In-Place Leases		Below-Market Ground Lease Obligation (2)		Below-Market Operating Leases (3)			Above-Market Ground Lease Obligation (4)
	(in thousands)
Remaining 2015	$	19,561	$	1,619	$	9,829	$	6	$	(7,239	)	$	(76	)
2016	23,763		1,503		10,741		8		(8,189		)	(101		)
2017	20,881		1,241		9,281		8		(7,337		)	(101		)
2018	17,275		831		6,373		8		(5,735		)	(101		)
2019	13,440		643		4,714		8		(3,597		)	(101		)
Thereafter	31,764		34		8,291		429		(2,473		)	(5,491		)
Total	$	126,684	$	5,871	$	49,229	$	467	$	(34,570	)	$	(5,971	)

_______________

(1) Represents estimated annual amortization related to above-market operating leases. Amounts will be recorded as a decrease to rental income in the consolidated statements of operations.

(2) Represents estimated annual amortization related to below-market ground lease obligations. Amounts will be recorded as an increase to ground lease expense in the consolidated statements of operations.

(3) Represents estimated annual amortization related to below-market operating leases. Amounts will be recorded as an increase to rental income in the consolidated statements of operations.

(4) Represents estimated annual amortization related to above-market ground lease obligations. Amounts will be recorded as a decrease to ground lease expense in the consolidated statements of operations.

5.    Receivables

Current Receivables, net

Current receivables, net is primarily comprised of contractual rents and other lease-related obligations due from tenants. The balance consisted of the following as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Current receivables (1)	$	10,107		$	9,228
Allowance for uncollectible tenant receivables (1)	(1,985		)	(1,999		)
Current receivables, net (1)	$	8,122		$	7,229

______________

(1) Excludes current receivables, net related to properties held for sale.

Deferred Rent Receivables, net

Deferred rent receivables, net consisted of the following as of March 31, 2015 and December 31, 2014:

	March 31, 2015 (1)			December 31, 2014
	(in thousands)
Deferred rent receivables	$	170,736		$	158,405
Allowance for deferred rent receivables	(2,155		)	(1,989		)
Deferred rent receivables, net	$	168,581		$	156,416

______________

(1) Excludes deferred rent receivables, net related to properties held for sale as of March 31, 2015.

16

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

6.    Secured and Unsecured Debt of the Operating Partnership

Secured Debt

The following table sets forth the composition of our secured debt as of March 31, 2015 and December 31, 2014:

Type of Debt	Annual Stated Interest Rate (1)	GAAP Effective Rate (1)(2)	Maturity Date	March 31, 2015 (3)		December 31, 2014 (3)
				(in thousands)
Mortgage note payable	4.27%	4.27%	February 2018	$	130,164	$	130,767
Mortgage note payable (4)	4.48%	4.48%	July 2027	97,000		97,000
Mortgage note payable (4)	6.05%	3.50%	June 2019	88,411		89,242
Mortgage note payable	6.51%	6.51%	February 2017	66,383		66,647
Mortgage note payable (4)	5.23%	3.50%	January 2016	52,332		52,793
Mortgage note payable (4)	5.57%	3.25%	February 2016	39,895		40,258
Mortgage note payable(4)	5.09%	3.50%	August 2015	34,178		34,311
Mortgage note payable(5)	4.94%	4.00%	April 2015	—		26,285
Mortgage note payable	7.15%	7.15%	May 2017	5,940		6,568
Other	Various	Various	Various	2,422		2,421
Total				$	516,725	$	546,292

______________

(1) All interest rates presented are fixed-rate interest rates.

(2) This represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of discounts/premiums, excluding debt issuance costs.

(3) Amounts reported include the amounts of unamortized debt premiums of $9.2 million and $10.3 million as of March 31, 2015 and December 31, 2014, respectively.

(4) The secured debt and the related properties that secure the debt are held in a special purpose entity and the properties are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

(5) This mortgage note payable was repaid during the three months ended March 31, 2015 prior to maturity at par.

Although our mortgage loans are secured and non-recourse to the Company and the Operating Partnership, the Company provides limited customary secured debt guarantees for items such as voluntary bankruptcy, fraud, misapplication of payments and environmental liabilities.

Unsecured Senior Notes

The following table summarizes the balance and significant terms of the registered unsecured senior notes issued by the Operating Partnership as of March 31, 2015 and December 31, 2014:

					Principal Amount as of
	Issuance date	Maturity date	Stated coupon rate	Effective interest rate (1)	March 31, 2015			December 31, 2014
					(in thousands)
4.250% Unsecured Senior Notes (2)	July 2014	August 2029	4.250%	4.350%	$	400,000		$	400,000
Unamortized discount					(4,273		)	(4,348		)
Net carrying amount					$	395,727		$	395,652
3.800% Unsecured Senior Notes (3)	January 2013	January 2023	3.800%	3.804%	$	300,000		$	300,000
Unamortized discount					(77		)	(79		)
Net carrying amount					$	299,923		$	299,921
4.800% Unsecured Senior Notes (3)	July 2011	July 2018	4.800%	4.827%	$	325,000		$	325,000
Unamortized discount					(246		)	(265		)
Net carrying amount					$	324,754		$	324,735
6.625% Unsecured Senior Notes (4)	May 2010	June 2020	6.625%	6.743%	$	250,000		$	250,000
Unamortized discount					(1,101		)	(1,154		)
Net carrying amount					$	248,899		$	248,846
5.000% Unsecured Senior Notes (5)	November 2010	November 2015	5.000%	5.014%	$	325,000		$	325,000
Unamortized discount					(23		)	(33		)
Net carrying amount					$	324,977		$	324,967

_______________________

(1) This represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of initial issuance discounts, excluding debt issuance costs.

17

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(2) Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year.

(3) Interest on these notes is payable semi-annually in arrears on January 15th and July 15th of each year.

(4) Interest on these notes is payable semi-annually in arrears on June 1st and December 1st of each year.

(5) Interest on these notes is payable semi-annually in arrears on May 3rd and November 3rd of each year.

Unsecured Revolving Credit Facility and Term Loan Facility

The following table summarizes the balance and terms of our unsecured revolving credit facility as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Outstanding borrowings	$	130,000		$	140,000
Remaining borrowing capacity	470,000			460,000
Total borrowing capacity (1)	$	600,000		$	600,000
Interest rate (2)	1.43		%	1.41		%
Facility fee-annual rate (3)	0.250%
Maturity date	July 2019

_______________

(1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $311.0 million under an accordion feature under the terms of the unsecured revolving credit facility and term loan facility.

(2) Our revolving credit facility interest rate was calculated based on an annual rate of LIBOR plus 1.250%.

(3) Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of March 31, 2015, $5.6 million of deferred financing costs remains to be amortized through the maturity date of our unsecured revolving credit facility.

The Company intends to borrow amounts under the unsecured revolving credit facility from time to time for general corporate purposes, to fund potential acquisitions, to finance development and redevelopment expenditures and to potentially repay long-term debt.

The following table summarizes the balance and terms of our term loan facility as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Outstanding borrowings	$	150,000		$	150,000
Interest rate (1)	1.58		%	1.56		%
Maturity date	July 2019

_______________

(1) Our unsecured term loan facility interest rate was calculated based on an annual rate of LIBOR plus 1.40%.

Additionally, the Company has a $39.0 million unsecured term loan with an annual interest rate of LIBOR plus 1.40% that matures in July 2019.

Debt Covenants and Restrictions

The unsecured revolving credit facility, the unsecured term loan facility, the unsecured term loan, the unsecured senior notes, and certain other secured debt arrangements contain covenants and restrictions requiring us to meet certain financial ratios and reporting requirements. Some of the more restrictive financial covenants include a maximum ratio of total debt to total asset value, a minimum fixed-charge coverage ratio, a minimum unsecured debt ratio and a minimum unencumbered asset pool debt service coverage ratio. Noncompliance with one or more of the covenants and restrictions could result in the full principal balance of the associated debt becoming immediately due and payable. We believe we were in compliance with all of our debt covenants as of March 31, 2015.

18

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Debt Maturities

The following table summarizes the stated debt maturities and scheduled amortization payments, excluding debt discounts and premiums, as of March 31, 2015:

Year	(in thousands)
Remaining 2015	$	366,630
2016	99,431
2017	71,748
2018	451,728
2019	395,369
Thereafter	1,041,644
Total (1)	$	2,426,550

________________________

(1) Includes gross principal balance of outstanding debt before impact of net unamortized premiums totaling approximately $3.5 million.

Capitalized Interest and Loan Fees

The following table sets forth gross interest expense reported in continuing operations, including debt discount/premium and loan cost amortization, net of capitalized interest, for the three months ended March 31, 2015 and 2014. The interest expense capitalized was recorded as a cost of development and redevelopment, and increased the carrying value of undeveloped land and construction in progress.

	Three Months Ended March 31,
	2015			2014
	(in thousands)
Gross interest expense	$	27,749		$	28,034
Capitalized interest and loan fees	(10,871		)	(10,782		)
Interest expense	$	16,878		$	17,252

7.    Noncontrolling Interests on the Company’s Consolidated Financial Statements

Common Units of the Operating Partnership

The Company owned an approximate 98.0%, 98.0% and 97.9% common general partnership interest in the Operating Partnership as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively. The remaining approximate 2.0%, 2.0% and 2.1% common limited partnership interest as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively, was owned by non-affiliate investors and certain of our executive officers and directors in the form of noncontrolling common units. There were 1,793,170, 1,804,200 and 1,804,200 common units outstanding held by these investors, executive officers and directors as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively.

The noncontrolling common units may be redeemed by unitholders for cash. Except under certain circumstances, we, at our option, may satisfy the cash redemption obligation with shares of the Company’s common stock on a one-for-one basis. If satisfied in cash, the value for each noncontrolling common unit upon redemption is the amount equal to the average of the closing quoted price per share of the Company’s common stock, par value $.01 per share, as reported on the NYSE for the ten trading days immediately preceding the applicable redemption date. The aggregate value upon redemption of the then-outstanding noncontrolling common units was $137.9 millionand $126.8 million as of March 31, 2015 and December 31, 2014, respectively. This redemption value does not necessarily represent the amount that would be distributed with respect to each noncontrolling common unit in the event of our termination or liquidation. In the event of our termination or liquidation, it is expected in most cases that each common unit would be entitled to a liquidating distribution equal to the liquidating distribution payable in respect of each share of the Company’s common stock.

19

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

8.    Stockholders’ Equity of the Company

At-The-Market Stock Offering Program

Under our current at-the-market stock offering program, which commenced in December 2014, we may offer and sell shares of our common stock having an aggregate gross sales price of up to $300.0 million from time to time in “at-the-market” offerings. Since commencement of the program through March 31, 2015, we have sold 1,648,893 shares of common stock having an aggregate gross sales price of $124.7 million. As of March 31, 2015, shares of common stock having an aggregate gross sales price of up to $175.3 million remain available to be sold under this program. Actual future sales will depend upon a variety of factors, including but not limited to market conditions, the trading price of the Company’s common stock and our capital needs. We have no obligation to sell the remaining shares available for sale under this program.

The following table sets forth information regarding sales of our common stock under our at-the-market offering program for the three months ended March 31, 2015:

	Three months  ended March 31, 2015
	(in millions, except share and per share data)
Shares of common stock sold during the three month period	1,507,393
Weighted average price per common share	$	76.09
Aggregate gross proceeds	$	114.7
Aggregate net proceeds after sales agent compensation	$	113.2

9.    Partners’ Capital of the Operating Partnership

Common Units Outstanding

The following table sets forth the number of common units held by the Company and the number of common units held by non-affiliate 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:

	March 31, 2015		December 31, 2014		March 31, 2014
Company owned common units in the Operating Partnership	88,031,377		86,259,684		82,218,332
Company owned general partnership interest	98.0	%	98.0	%	97.9	%
Noncontrolling common units of the Operating Partnership	1,793,170		1,804,200		1,804,200
Ownership interest of noncontrolling interest	2.0	%	2.0	%	2.1	%

For a further discussion of the noncontrolling common units as of March 31, 2015 and December 31, 2014, refer to Note 7.

10.    Share-Based Compensation

Stockholder Approved Equity Compensation Plans

As of March 31, 2015, we maintained one share-based incentive compensation plan, the Kilroy Realty 2006 Incentive Award Plan as amended (the “2006 Plan”). As of March 31, 2015, 494,405 shares were available for grant under the 2006 Plan. The calculation of shares available for grant includes a reserve for a sufficient number of shares to cover the vesting and payment of performance-based vesting awards at the target levels for either performance and/or market conditions with outstanding performance periods. At our Annual Meeting of Stockholders, currently scheduled to be held on May 21, 2015, stockholders will be asked to approve an amendment and restatement of the 2006 Plan, which includes an increase in the share limit by 1,200,000 shares so the new aggregate share limit for the 2006 Plan would be 8,320,000 shares.

2015 Share-Based Compensation Grants

On January 27, 2015, the Executive Compensation Committee of the Company’s Board of Directors awarded 212,468 restricted stock units (“RSUs”) to certain officers of the Company under the 2006 Plan, which included 127,657 RSUs, or 60%, that are

20

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

subject to market and performance-based vesting requirements (the “2015 Performance-Based RSUs”) and 84,811 RSUs, or 40%, that are subject to time-based vesting requirements (the “2015 Time-Based RSUs”).

2015 Performance-Based RSU Grant

The 2015 Performance-Based RSUs are scheduled to vest at the end of a three-year period based upon the achievement of pre-set FFO per share goals (the “performance condition”) for the year ending December 31, 2015 and also based upon the average annual relative total stockholder return targets (the “market condition”) for the three-year period ending December 31, 2017. The 2015 Performance-Based RSUs are also subject to a three-year service vesting provision and will cliff vest at the end of the three-year period. The number of 2015 Performance-Based RSUs ultimately earned, and therefore the compensation costs for these awards, could fluctuate from the 127,657 RSUs granted based upon the levels of achievement for both the FFO per share and relative stockholder return metrics. During the 2015 performance period, the estimate of the number of awards earned are evaluated quarterly based on our forecasted level of achievement of the FFO hurdle. Compensation expense for the 2015 Performance-Based RSU grant will be recorded on a straight-line basis over the three-year period.

Each 2015 Performance-Based RSU represents the right to receive one share of our common stock in the future. The total fair value of the 2015 Performance-Based RSU grant was $10.1 million at January 27, 2015 and was calculated using a Monte Carlo simulation pricing model based on the assumptions in the table below. The determination of the fair value of the 2015 Performance-Based RSU grant takes into consideration the likelihood of achievement of both the performance condition and the market condition discussed above. For the three months ended March 31, 2015, we recorded compensation expense based upon the $78.55 fair value at January 27, 2015. The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing model:

	Fair Value Assumptions
Fair value per share at January 27, 2015	$78.55
Expected share price volatility	20.00%
Risk-free interest rate	0.92%
Remaining expected life	2.9 years

The computation of expected volatility is based on a blend of the historical volatility of our shares of common stock over approximately six years, as that is expected to be most consistent with future volatility and equates to a time period twice as long as the approximate three-year remaining performance period of the RSUs and implied volatility data based on the observed pricing of six month publicly-traded options on our shares of common stock. The risk-free interest rate is based on the yield curve on zero-coupon U.S. Treasury STRIP securities in effect at January 27, 2015. The expected dividend yield is estimated by examining the average of the historical dividend yield levels over the remaining 2.9 year term of the RSUs and our current annualized dividend yield as of January 27, 2015. The expected life of the RSUs is equal to the remaining 2.9 year vesting period at January 27, 2015.

2015 Time-Based RSU Grant

The 2015 Time-Based RSUs are scheduled to vest in three equal installments beginning on January 5, 2016 through January 5, 2018. Compensation expense for the 2015 Time-Based RSUs will be recognized on a straight-line basis over the three-year service vesting period. Each 2015 Time-Based RSU represents the right to receive one share of our common stock in the future. The total fair value of the 2015 Time-Based RSU grant was $6.4 million, which was based on the $75.34 closing share price of the Company’s common stock on the NYSE on January 27, 2015.

Share-Based Award Activity

During the three months ended March 31, 2015, 237,000 non-qualified stock options were exercised and issued at an exercise price per share equal to $42.61. As of March 31, 2015, we had 765,000 stock options outstanding.

Share-Based Compensation Cost Recorded During the Period

The total compensation cost for all share-based compensation programs was $4.3 million and $2.9 million for the three months ended March 31, 2015 and 2014, respectively. Of the total share-based compensation costs, $0.7 million and $0.4 million was capitalized as part of real estate assets for the three months ended March 31, 2015 and 2014, respectively. As of March 31, 2015, there was approximately $42.5 million of total unrecognized compensation cost related to nonvested incentive awards granted

21

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

under share-based compensation arrangements that is expected to be recognized over a weighted-average period of 2.5 years. The remaining compensation cost related to these nonvested incentive awards had been recognized in periods prior to March 31, 2015.

11.    Commitments and Contingencies

General

As of March 31, 2015, we had commitments of approximately $412.6 million, excluding our ground lease commitments, for contracts and executed leases directly related to our operating and redevelopment properties.

Environmental Matters

We follow the policy of monitoring all of our properties, both acquisition and existing stabilized portfolio properties, for the presence of hazardous or toxic substances. While there can be no assurance that a material environmental liability does not exist, we are not currently aware of any environmental liability with respect to our stabilized portfolio properties that would have a material adverse effect on our financial condition, results of operations and cash flow, or that we believe would require additional disclosure or the recording of a loss contingency.

As of March 31, 2015, we had accrued environmental remediation liabilities of approximately $16.1 million recorded on our consolidated balance sheets in connection with certain of our recent development acquisitions and related development activities. It is possible that we could incur additional environmental remediation costs in connection with these recent development acquisitions.  However, given we are in the very early stages of development, possible additional environmental costs are not reasonably estimable at this time. 

12.    Fair Value Measurements and Disclosures

Assets and Liabilities Reported at Fair Value

The only assets we record at fair value on our consolidated financial statements are the marketable securities related to our Deferred Compensation Plan. The following table sets forth the fair value of our marketable securities as of March 31, 2015 and December 31, 2014:

	Fair Value (Level  1) (1)
	March 31, 2015		December 31, 2014
Description	(in thousands)
Marketable securities (2)	$	13,337	$	11,971

_______________

(1) Based on quoted prices in active markets for identical securities.

(2) The marketable securities are held in a limited rabbi trust.

We report the change in the fair value of the marketable securities at the end of each accounting period in interest income and other net investment gains in the consolidated statements of operations. We also adjust the related Deferred Compensation Plan liability to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each participant, which results in a corresponding increase or decrease to compensation cost for the period.

The following table sets forth the net gain on marketable securities recorded during the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015		2014
Description	(in thousands)
Net gain on marketable securities	$	388	$	154

22

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Financial Instruments Disclosed at Fair Value

The following table sets forth the carrying value and the fair value of our other financial instruments as of March 31, 2015 and December 31, 2014:

	March 31, 2015				December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in thousands)
Liabilities
Secured debt (1)	$	516,725	$	525,495	$	546,292	$	559,483
Unsecured debt, net (2)	1,783,280		1,870,576		1,783,121		1,858,492
Unsecured line of credit (1)	130,000		130,032		140,000		145,051

_______________

(1) Fair value calculated using Level II inputs, which are based on model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

(2) Fair value calculated using Level I and Level II inputs. Level I inputs are based on quoted prices for identical instruments in active markets. The carrying value and fair value of the Level I instruments was $1,269.5 million and $1,335.2 million, respectively, as of March 31, 2015. The carrying value and fair value of the Level I instruments as of December 31, 2014, was $1,269.4 million and $1,322.2 million, respectively. The carrying value and fair value of the Level II instruments was $513.8 million and $535.4 million, respectively, as of March 31, 2015. The carrying value and fair value of the Level II instruments as of December 31, 2014, was $513.7 million and $536.3 million, respectively.

23

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

13.    Net Income Available to Common Stockholders Per Share of the Company

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands, except share and per share amounts)
Numerator:
Income from continuing operations	$	44,002		$	10,874
Income from continuing operations attributable to noncontrolling common units of the Operating Partnership	(815		)	(160		)
Preferred dividends	(3,313		)	(3,313		)
Allocation to participating securities (1)	(415		)	(427		)
Numerator for basic and diluted income from continuing operations available to common stockholders	39,459			6,974
Income from discontinued operations (2)	—			91,058
Income from discontinued operations attributable to noncontrolling common units of the Operating Partnership (2)	—			(1,927		)
Numerator for basic and diluted net income available to common stockholders	$	39,459		$	96,105
Denominator:
Basic weighted average vested shares outstanding	86,896,776			82,124,538
Effect of dilutive securities	537,590			2,015,532
Diluted weighted average vested shares and common share equivalents outstanding	87,434,366			84,140,070
Basic earnings per share:
Income from continuing operations available to common stockholders per share	$	0.45		$	0.08
Income from discontinued operations per common share (2)	0.00			1.09
Net income available to common stockholders per share	$	0.45		$	1.17
Diluted earnings per share:
Income from continuing operations available to common stockholders per share	$	0.45		$	0.08
Income from discontinued operations per common share (2)	0.00			1.06
Net income available to common stockholders per share	$	0.45		$	1.14

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

(2) The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

The impact of the contingently issuable shares were considered in our diluted earnings per share calculation for the three months ended March 31, 2015 and 2014, because we reported income from continuing operations attributable to common stockholders in the respective periods and the effect was dilutive. As of March 31, 2015 contingently issuable shares consist of stock options and 182,610 market measure-based RSUs. As of March 31, 2014 contingently issuable shares consist of stock options and the impact of the Company's 4.25% Exchangeable Notes due November 2014 (the "4.25% Exchangeable Notes") prior to their maturity and settlement in November 2014. As of March 31, 2014 the 182,610 market measure-based RSUs were not included in dilutive securities since they were considered contingently issuable shares as not all the necessary performance conditions had been met. The 2015 Performance-Based RSUs and our other nonvested market measure-based RSUs are not included in dilutive securities as of March 31, 2015 and 2014 because they are not included until all the necessary performance conditions have been met.

See Note 10 “Share-Based Compensation” for additional information regarding the stock options and other share-based compensation.

24

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

14.    Net Income Available to Common Unitholders Per Unit of the Operating Partnership

The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net income available to common unitholders for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands, except unit and per unit amounts)
Numerator:
Income from continuing operations	$	44,002		$	10,874
Income from continuing operations attributable to noncontrolling interests in consolidated subsidiaries	(75		)	(65		)
Preferred distributions	(3,313		)	(3,313		)
Allocation to participating securities (1)	(415		)	(427		)
Numerator for basic and diluted income from continuing operations available to common unitholders	40,199			7,069
Income from discontinued operations (2)	—			91,058
Numerator for basic and diluted net income available to common unitholders	$	40,199		$	98,127
Denominator:
Basic weighted average vested units outstanding	88,693,306			83,928,993
Effect of dilutive securities	537,590			2,015,532
Diluted weighted average vested units and common unit equivalents outstanding	89,230,896			85,944,525
Basic earnings per unit:
Income from continuing operations available to common unitholders per unit	$	0.45		$	0.08
Income from discontinued operations per common unit (2)	0.00			1.09
Net income available to common unitholders per unit	$	0.45		$	1.17
Diluted earnings per unit:
Income from continuing operations available to common unitholders per unit	$	0.45		$	0.08
Income from discontinued operations per common unit (2)	0.00			1.06
Net income available to common unitholders per unit	$	0.45		$	1.14

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

(2) The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

The impact of the contingently issuable units were considered in our diluted earnings per unit calculation for the three months ended March 31, 2015 and 2014 because the Operating Partnership reported income from continuing operations attributable to common unitholders in the respective periods and the effect was dilutive. As of March 31, 2015 contingently issuable shares consist of stock options and 182,610 market measure-based RSUs. As of March 31, 2014 contingently issuable shares consist of stock options and the impact of the 4.25% Exchangeable Notes prior to their maturity and settlement in November 2014. As of March 31, 2014 the 182,610 market measure-based RSUs were not included in dilutive securities since they were considered contingently issuable shares as not all the necessary performance conditions had been met. The 2015 Performance-Based RSUs and our other nonvested market measure-based RSUs are not included in dilutive securities as of March 31, 2015 and 2014 because they are not included until all the necessary performance conditions have been met.

See Note 10 “Share-Based Compensation” for additional information regarding the stock options and other share-based compensation.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

15.    Subsequent Events

On April 15, 2015, aggregate dividends, distributions and dividend equivalents of $31.9 million were paid to common stockholders and common unitholders of record on March 31, 2015 and RSU holders of record on the payment date.

At March 31, 2015, the Company had a portfolio of nine properties located in San Diego, California that were classified as held for sale. The properties are being sold in two tranches. The Company completed the sale of the first tranche for gross proceeds of $95.0 million on April 15, 2015 (see Note 3).

At March 31, 2015, the Company had an office property located in Redmond, Washington that was classified as held for sale. On April 28, 2015, the Company completed the sale of this property for gross proceeds of $51.2 million (see Note 3).

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ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF

OPERATIONS

The following discussion relates to our consolidated financial statements and should be read in conjunction with the financial statements and notes thereto appearing elsewhere in this report. The results of operations discussion is combined for the Company and the Operating Partnership because there are no material differences in the results of operations between the two reporting entities.

Forward-Looking Statements

Statements contained in this “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations” that are not historical facts may be forward-looking statements. Forward-looking statements include, among other things, statements or information concerning projected future occupancy and rental rates, lease expirations, debt maturity, potential investments, strategies such as capital recycling, development and redevelopment activity, projected construction costs, dispositions, future incentive compensation, pending, potential or proposed acquisitions and other forward-looking financial data, as well as the discussion below under the captions “—Factors That May Influence Future Results of Operations,” “—Liquidity and Capital Resource of the Company,” and “—Liquidity and Capital Resources of the Operating Partnership.” Forward-looking statements can be identified by the use of words such as “believes,” “expects,” “projects,” “may,” “will,” “should,” “targets,” “seeks,” “approximately,” “intends,” “plans,” “pro forma,” “estimates” or “anticipates” and the negative of these words and phrases and similar expressions that do not relate to historical matters. Forward-looking statements are based on our current expectations, beliefs and assumptions, and are not guarantees of future performance. Forward-looking statements are inherently subject to uncertainties, risks, changes in circumstances, trends and factors that are difficult to predict, many of which are outside of our control. Accordingly, actual performance, results and events may vary materially from those indicated in the forward-looking statements, and you should not rely on the forward-looking statements as predictions of future performance, results or events. Numerous factors could cause actual future performance, results and events to differ materially from those indicated in forward-looking statements. For a discussion of those risk factors, see the discussion below as well as “Item 1A. Risk Factors” and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the Company’s and the Operating Partnership’s annual report on Form 10-K for the year ended December 31, 2014 and their respective other filings with the SEC. All forward-looking statements are based on information that was available and speak only as of the date on which they are made. We assume no obligation to update any forward-looking statement that becomes untrue because of subsequent events, new information or otherwise, except to the extent we are required to do so in connection with our ongoing requirements under Federal securities laws.

Overview and Background

We are a self-administered REIT active in premier office submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Los Angeles, Orange County, San Diego County, the San Francisco Bay Area and greater Seattle, which we believe have strategic advantages and strong barriers to entry. We own our interests in all of our properties through the Operating Partnership and the Finance Partnership and generally conduct substantially all of our operations through the Operating Partnership. We owned an approximate 98.0%, 98.0% and 97.9% general partnership interest in the Operating Partnership as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively. All of our properties are held in fee except for the eleven office buildings that are held subject to long-term ground leases for the land.

Factors That May Influence Future Results of Operations

In-Process and Future Development Pipeline. We believe that a significant portion of our long-term future growth will come from the completion of our under construction and in-process development projects as well as executing on our future development pipeline, including expanding entitlements, subject to market conditions. Over the past two years, we increased our focus on development opportunities and expanded our future development pipeline through targeted acquisitions of development opportunities on the West Coast.

We have a proactive planning process by which we continually evaluate the size, timing, costs and scope of our development program and, as necessary, scale activity to reflect the economic conditions and the real estate fundamentals that exist in our submarkets. We expect to execute on our development program with prudence and will be pursuing opportunities with attractive economic returns in strategic locations with proximity to public transportation or transportation access and retail amenities and in markets with strong fundamentals and visible demand. We plan to develop in phases as appropriate and we strongly favor starting projects that are pre-leased.

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As of March 31, 2015, our in-process development pipeline consisted of the following six projects under construction, which was 85% pre-leased at March 31, 2015.

• 350 Mission Street, SOMA, San Francisco, California, which we acquired in October 2012. This development project, which is 100% pre-leased to salesforce.com, Inc., has a total estimated investment of approximately $280 million and will encompass approximately 450,000 rentable square feet upon completion. The property is expected to be LEED platinum certified, the first ground up high-rise development property in the city expected to receive this designation. Construction is currently in process and is expected to be completed towards the end of 2015, and the tenant is currently expected to occupy in phases.

• 333 Brannan Street, SOMA, San Francisco, California, which we acquired in July 2012. This development project is 100% pre-leased to Dropbox, has a total estimated investment of approximately $105 million and will encompass 185,000 rentable square feet upon completion. The property is expected to be LEED platinum certified and construction is currently in process and is expected to be completed at the end of the fourth quarter in 2015.

• Crossing/900, Redwood City, California, which we acquired in June 2013 with a local partner. This development project is 100% pre-leased to Box, Inc., has a total estimated investment of approximately $190 million and will encompass approximately 339,000 rentable square feet upon completion. Construction is currently in process and the first of two office buildings will be delivered early in the fourth quarter of 2015.

• Columbia Square, Hollywood, California, which we acquired in September 2012. This development project is comprised of two phases, historical and new office and residential, and is located in the heart of Hollywood, California, two blocks from the corner of Sunset Boulevard and Vine Street. During 2013, we commenced development on both phases comprising approximately 685,000 rentable square feet. The two office components comprising 480,000 square feet have an estimated investment of approximately $300 million and are expected to be completed in phases between the second quarter of 2015 and the first quarter of 2016, and the project is expected to be stabilized in phases between the second quarter of 2015 and the first quarter of 2017.

The second phase, the residential component of the project, which will encompass approximately 205,000 square feet upon completion, will be a mix of high-end long-term rentals and extended stay apartment homes and has an estimated investment of approximately $140 million. It will be the first luxury extended stay property to be located in the heart of Hollywood. Construction of this project is currently expected to be completed in the first quarter of 2016 and the project is expected to be stabilized in phases through the first quarter of 2017.

• The Heights at Del Mar, Del Mar, California, which we acquired in September 2013. The project is a 73,000 square foot office project and has a total estimated investment of approximately $45 million. Construction on this project is currently in process and is expected to be completed in the fourth quarter of 2015.

In addition, as of March 31, 2015, we had additional undeveloped land holdings, located in various submarkets in San Diego County, San Francisco Bay Area, Greater Seattle and Los Angeles with an aggregate cost basis of approximately $598.0 million at which we believe we could develop more than 3.0 million rentable square feet, depending on successful obtainment of entitlements and market conditions. In the future, we may also enter into agreements to acquire other development or redevelopment opportunities, either as wholly owned properties or through joint ventures, and those agreements typically will be subject to the satisfaction of closing conditions.

Increase in our development activities could continue to cause an increase in the average development asset balances qualifying for interest and other carry cost capitalization in future periods. For the three months ended March 31, 2015 and 2014, we capitalized $10.9 million and $10.8 million, respectively, of interest to our qualifying development projects. For the three months ended March 31, 2015 and 2014, we capitalized $3.5 million and $2.6 million, respectively, of internal costs to our qualifying redevelopment and development projects.

Development Acquisitions. During the three months ended March 31, 2015, we acquired one future development opportunity in Greater Seattle for a purchase price of $49.5 million. During 2014, we acquired five office buildings in two transactions for an aggregate purchase price of approximately $206.6 million and three undeveloped land sites, including two adjacent land sites, in three transactions with an aggregate purchase price of approximately $166.0 million. We generally finance our acquisitions through proceeds from the issuance of debt and equity securities, borrowings under our unsecured revolving credit facility, proceeds from our capital recycling program, the assumption of existing debt and cash flows from operations.

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As a key component of our growth strategy, we continue to evaluate value-add acquisition opportunities (including undeveloped land, development opportunities and operating properties). As a result, at any point in time we may have one or more potential acquisitions under consideration that are in varying stages of evaluation, negotiation or due diligence review, which may include potential acquisitions under contract. We remain a disciplined buyer of development opportunities and operating properties and continue to focus on value-add opportunities in West Coast markets populated by knowledge and creative based tenants in a variety of industries, including technology, media, healthcare, entertainment and professional services. We cannot provide assurance that we will complete additional future acquisitions. In the future, we may enter into agreements to acquire additional properties or undeveloped land, either as wholly owned properties or through joint ventures, and those agreements typically will be subject to the satisfaction of closing conditions. We cannot provide assurance that we will enter into any agreements to acquire properties, or undeveloped land, or that the potential acquisitions contemplated by any agreements we may enter into in the future will be completed.

Costs associated with acquisitions accounted for as business combinations are expensed as incurred, and we may be unable to complete an acquisition after making a nonrefundable deposit or incurring acquisition-related costs. In addition, acquisitions are subject to various other risks and uncertainties. We expect that during the remainder of 2015 we will continue to pursue value-add property and undeveloped land acquisitions that we expect to either add immediate Net Operating Income to our portfolio or play a strategic role in our future growth.

Capital Recycling Program. We continuously evaluate opportunities for the potential disposition of properties and undeveloped land in our portfolio. See the “Liquidity and Capital Resources of the Operating Partnership – Liquidity Sources” section for further information regarding our capital recycling strategy.

In connection with our capital recycling strategy, during the three months ended March 31, 2015, we completed the sale of one land parcel in Irvine, California to an unaffiliated third party for gross sales proceeds of $26.0 million. This land parcel was classified as held for sale as of December 31, 2014. In addition, as of March 31, 2015, we classified ten properties as held for sale that are located in Redmond, Washington and in San Diego, California. Four of these properties were sold in April 2015 and the remaining six properties are expected to be sold in the second quarter of 2015 for aggregate total gross proceeds of approximately $309.2 million. During 2014, we completed the sale of 17 properties and one undeveloped land parcel to unaffiliated third parties in six separate transactions for gross sales proceeds totaling approximately $432.6 million.

The timing of any potential future disposition transactions will depend on market conditions and other factors, including but not limited to, our capital needs and our ability to defer some or all of the taxable gains on the sales. We cannot assure you that we will dispose of any additional properties or that any acquisitions and/or dispositions will qualify as Section 1031 Exchanges. See the “Liquidity and Capital Resources of the Operating Partnership – Liquidity Sources” section for further information.

Leasing Activity and Changes in Rental Rates. The amount of net rental income generated by our properties depends principally on our ability to maintain the occupancy rates of currently leased space and to lease currently available space, newly developed or redeveloped properties, newly acquired properties with vacant space, and space available from unscheduled lease terminations. The amount of rental income we generate also depends on our ability to maintain or increase rental rates in our submarkets. Negative trends in one or more of these factors could adversely affect our rental income in future periods. The following tables set forth certain information regarding leasing activity for our stabilized portfolio during the three months ended March 31, 2015.

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Information on Leases Commenced and Executed

For Leases Commenced

	1st & 2nd Generation (1)				2nd Generation (1)
	Number of Leases (2)		Rentable Square Feet (2)		TI/LC per Sq. Ft. (3)		Changes in Rents (4)(5)		Changes in Cash Rents (6)		Retention Rates (7)		Weighted Average Lease Term (in months)
	New	Renewal	New	Renewal
Three Months Ended March 31, 2015	16	20	254,166	182,293	$	38.09	19.9	%	10.6	%	57.8	%	72

For Leases Executed ⁽⁸⁾  

	1st & 2nd Generation (1)				2nd Generation (1)
	Number of Leases (2)		Rentable Square Feet (2)		TI/LC per Sq. Ft. (3)		Changes in Rents (4)(5)		Changes in Cash Rents (6)		Weighted Average Lease Term (in months)
	New	Renewal	New	Renewal
Three Months Ended March 31, 2015	22	20	215,232	186,942	$	40.65	26.7	%	18.5	%	61

_______________________

(1) First generation leasing includes space where we have made capital expenditures that result in additional revenue generated when the space is re-leased. Second generation leasing includes space where we have made capital expenditures to maintain the current market revenue stream.

(2) Represents leasing activity for leases that commenced or signed during the period, including first and second generation space, net of month-to-month leases. Excludes leasing on new construction.

(3) Tenant improvements and leasing commissions per square foot exclude tenant-funded tenant improvements.

(4) Calculated as the change between GAAP rents for new/renewed leases and the expiring GAAP rents for the same space. Excludes leases for which the space was vacant longer than one year or vacant when the property was acquired.

(5) Excludes commenced and executed leases of approximately 122,538 square feet for the three months ended March 31, 2015 and 41,465 rentable square feet for the threemonths ended March 31, 2015, for which the space was vacant longer than one year or being leased for the first time. Space vacant for more than one year is excluded from our change in rents calculations to provide a meaningful market comparison.

(6) Calculated as the change between stated rents for new/renewed leases and the expiring stated rents for the same space. Excludes leases for which the space was vacant longer than one year or vacant when the property was acquired.

(7) Calculated as the percentage of space either renewed or expanded into by existing tenants or subtenants at lease expiration.

(8) For the three months ended March 31, 2015, 16 new leases totaling 152,489 rentable square feet were signed but not commenced as of March 31, 2015.

As of March 31, 2015, we believe that the weighted average cash rental rates for our stabilized portfolio, including recently acquired operating properties, are approximately 10% under the current average market rental rates, although individual properties within any particular submarket presently may be leased either above, below, or at the current market rates within that submarket, and the average rental rates for individual submarkets may be above, below, or at the average cash rental rate of our portfolio.

In general, market rental rates have continued to increase in the majority of our submarkets over the last several quarters. Our rental rates and occupancy are impacted by general economic conditions, including the pace of regional economic growth and access to capital. Therefore, we cannot give any assurance that leases will be renewed or that available space will be re-leased at rental rates equal to or above the current market rates. Additionally, decreased demand and other negative trends or unforeseeable events that impair our ability to timely renew or re-lease space could have further negative effects on our future financial condition, results of operations and cash flows.

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Scheduled Lease Expirations. The following table sets forth certain information regarding our lease expirations for our stabilized portfolio for the remainder of 2015 and the next five years.

Lease Expirations ⁽¹⁾ 

Year of Lease Expiration	Number of Expiring Leases	Total Square Feet	% of Total Leased Sq. Ft.		Annualized Base Rent (2)		% of Total Annualized Base Rent (2)		Annualized Base Rent per Sq. Ft. (2)
					(in thousands)
Remainder of 2015	81	866,580	7.1	%	$	27,479	6.0	%	$	31.71
2016	88	816,586	6.7	%	24,978		5.5	%	30.59
2017	108	1,783,139	14.6	%	60,639		13.3	%	34.01
2018	68	1,337,276	10.8	%	53,752		11.7	%	40.20
2019	81	1,487,170	12.0	%	54,077		11.8	%	36.36
2020	74	1,778,318	14.5	%	64,444		14.1	%	36.24
Total	500	8,069,069	65.7	%	$	285,369	62.4	%	$	35.37

________________________ 

(1) The information presented for all lease expiration activity reflects leasing activity through March 31, 2015 for our stabilized portfolio. For leases that have been renewed early or space that has been re-leased to a new tenant, the expiration date and annualized base rent information presented takes into consideration the renewed or re-leased lease terms. Excludes space leased under month-to-month leases, intercompany leases, vacant space and lease renewal options not executed as of March 31, 2015.

(2) Annualized base rent includes the impact of straight-lining rent escalations and the amortization of free rent periods and excludes the impact of the following: amortization of deferred revenue related tenant-funded tenant improvements, amortization of above/below market rents, amortization for lease incentives due under existing leases and expense reimbursement revenue. Additionally, the underlying leases contain various expense structures including full service gross, modified gross and triple net. Percentages represent percentage of total portfolio annualized contractual base rental revenue. For additional information on tenant improvement and leasing commission costs incurred by the Company for the current reporting period, please see further discussion under the caption “Information on Leases Commenced and Executed.”

In addition to the 0.5 million rentable square feet, or 3.9%, of currently available space in our stabilized portfolio, leases representing approximately 7.1% and 6.7% of the occupied square footage of our stabilized portfolio are scheduled to expire during 2015 and 2016, respectively. The leases scheduled to expire during the remainder of 2015 and in 2016 represent approximately 1.7 million rentable square feet or 11.5% of our total annualized base rental revenue. We believe that the weighted average cash rental rates are approximately 10% under the current average market rental rates for leases scheduled to expire during the remainder of 2015 and in 2016, although individual properties within any particular submarket presently may be leased either above, below, or at the current quoted market rates within that submarket, and the average rental rates for individual submarkets may be above, below, or at the average cash rental rate of our overall portfolio. Our ability to re-lease available space depends upon both general market conditions and the market conditions in the specific regions in which individual properties are located.

Incentive Compensation. Our Executive Compensation Committee determines compensation, including cash bonuses and equity incentives, for our executive officers. For 2015, the annual cash bonus program was structured to allow the Executive Compensation Committee to evaluate a variety of key quantitative and qualitative metrics at the end of the year and make a determination based on the Company’s and management’s overall performance. Our Executive Compensation Committee also grants equity incentive awards from time to time that include performance-based or market-measure based vesting requirements and/or time-based vesting requirements. As a result, accrued incentive compensation and compensation expense for future awards may be affected by our operating and development performance, financial results, stock price, performance against applicable performance-based vesting goals, market conditions and other factors. Consequently, we cannot predict the amounts that will be recorded in future periods related to such incentive compensation.

As of March 31, 2015, there was approximately $42.5 million of total unrecognized compensation cost related to outstanding nonvested shares of restricted common stock, RSUs and stock options issued under share-based compensation arrangements. Those costs are expected to be recognized over a weighted-average period of 2.5 years. The $42.5 million of unrecognized compensation cost does not reflect the future compensation cost for any potential share-based awards that may be issued. Share-based compensation expense for potential future awards could be affected by our operating and development performance, financial results, stock price, performance against applicable performance-based vesting goals, market conditions and other factors.

Stabilized Portfolio Information

As of March 31, 2015, our stabilized portfolio was comprised of 101 office properties encompassing an aggregate of approximately 13.0 million rentable square feet. Our stabilized portfolio includes all of our properties with the exception of development and redevelopment properties currently under construction or committed for construction, “lease-up” properties, real estate assets held for sale and undeveloped land. We define redevelopment properties as those properties for which we expect to spend significant development and construction costs on the existing or acquired buildings pursuant to a formal plan, the intended

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result of which is a higher economic return on the property. We had no redevelopment properties as of March 31, 2015. We define lease-up properties as properties we recently developed or redeveloped that have not yet reached 95% occupancy and are within one year following cessation of major construction activities. There were no operating properties in “lease-up” as of March 31, 2015. Our stabilized portfolio also excludes our future development pipeline, which is comprised of ten potential development sites, representing approximately 106 gross acres of undeveloped land on which we believe we have the potential to develop over 3.0 million square feet of office space, depending upon economic conditions.

As of March 31, 2015, the following properties were excluded from our stabilized portfolio:

	Number of Properties/Projects	Estimated Rentable Square Feet
Properties held for sale (1)	10	1,044,844
Development projects under construction (2)	6	1,732,000

_______________

(1) Includes one property located in Redmond, Washington and nineproperties located in the Sorrento Mesa/UTC submarkets of San Diego, California. For additional information see Note 3.

(2) Estimated rentable square feet upon completion.

The following table reconciles the changes in the rentable square feet in our stabilized portfolio of operating properties from March 31, 2014 to March 31, 2015:

	Number of Buildings		Rentable Square Feet
Total as of March 31, 2014	107		13,305,145
Acquisitions (1)	4		266,982
Completed development projects placed in-service	5		928,342
Dispositions and properties held for sale	(15	)	(1,467,128	)
Remeasurement	—		14,379
Total as of March 31, 2015	101		13,047,720

________________________

(1) Excludes redevelopment and development property acquisitions.

Occupancy Information

The following table sets forth certain information regarding our stabilized portfolio:

Stabilized Portfolio Occupancy

Region	Number of Buildings	Rentable Square Feet	Occupancy at (1)
			3/31/2015		12/31/2014		9/30/2014
Los Angeles and Ventura Counties	27	3,505,514	94.3	%	92.8	%	92.7	%
Orange County	1	271,556	96.0	%	98.7	%	97.8	%
San Diego	37	3,317,350	95.8	%	90.9	%	90.8	%
San Francisco Bay Area	24	3,887,161	97.3	%	97.3	%	98.8	%
Greater Seattle	12	2,066,139	97.5	%	98.1	%	95.2	%
Total Stabilized Portfolio	101	13,047,720	96.1	%	94.4	%	94.1	%

	Average Occupancy
	Three Months Ended March 31,
	2015		2014
Stabilized Portfolio(1)	95.4	%	93.1	%
Same Store Portfolio(2)	95.5	%	94.6	%

__________________________________

(1) Occupancy percentages reported are based on our stabilized office portfolio as of the end of the period presented, and excludes occupancy percentages of properties held for sale.

(2) Occupancy percentages reported are based on office properties owned and stabilized as of January 1, 2014 and still owned and stabilized as of March 31, 2015, and excludes occupancy percentages of properties held for sale at March 31, 2015. See discussion under “Results of Operations” for additional information.

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Current Regional Information

The West Coast real estate markets in which we operate continue to strengthen, driven by improving economic conditions, net positive job growth and rising business confidence and expansion, especially among the region's technology, social media, entertainment, life science and communication industries.

San Francisco Bay Area. In the first quarter of 2015, the San Francisco Bay Area market continued to outperform most U.S. real estate markets and continues to be led by the strength in the technology sector. Rental growth remains strong as supply of large blocks of space remains limited. As of March 31, 2015, our San Francisco Bay Area stabilized portfolio of 3.9 million rentable square feet was 97.3% occupied with approximately 105,000 available rentable square feet, compared to 97.3% occupied with approximately 104,000 available rentable square feet as of December 31, 2014. As of March 31, 2015, we were 99.2% leased in the San Francisco Bay Area.

As of March 31, 2015, leases representing an aggregate of approximately 162,000 and 118,000 rentable square feet are scheduled to expire during the remainder of 2015 and in 2016, respectively, in this region. The aggregate rentable square feet under leases scheduled to expire during the remainder of 2015 and in 2016 represents approximately 2.3% of our occupied rentable square feet and 2.6% of our annualized base rental revenues in our total stabilized portfolio as of March 31, 2015.

Greater Seattle. During the first quarter of 2015, Greater Seattle experienced strong leasing activity. As of March 31, 2015, our greater Seattle stabilized portfolio of 2.1 million rentable square feet was 97.5% occupied with approximately 51,000 available rentable square feet, compared to 98.1% occupied with approximately 43,000 available rentable square feet as of December 31, 2014. As of March 31, 2015, we were 98.4% leased in the Greater Seattle Area.

As of March 31, 2015, leases representing an aggregate of approximately 171,000 and 98,000 rentable square feet are scheduled to expire during the remainder of 2015 and in 2016, respectively, in this region. The aggregate rentable square feet under leases scheduled to expire during the remainder of 2015 and in 2016 represents approximately 2.2% of our occupied rentable square feet and 1.5% of our annualized base rental revenues in our total stabilized portfolio as of March 31, 2015.

San Diego County. San Diego continued to show signs of growth during the first quarter of 2015 driven by the diversification of its economy, including scientific research and development, tourism, defense and professional services. Our San Diego County stabilized portfolio of 3.3 million rentable square feet was 95.8% occupied with approximately 138,000 available rentable square feet as of March 31, 2015 compared to 90.9% occupied with approximately 386,000 available rentable square feet as of December 31, 2014. The increase in occupancy is primarily due to the exclusion of the held for sale properties from our stabilized portfolio at March 31, 2015. As of March 31, 2015, we were 96.8% leased in San Diego County.

As of March 31, 2015, leases representing an aggregate of approximately 279,000 and 292,000 rentable square feet are scheduled to expire during the remainder of 2015 and in 2016, respectively, in this region. The aggregate rentable square feet under leases scheduled to expire during the remainder of 2015 and in 2016 represents approximately 4.7% of our occupied rentable square feet and 3.3% of our annualized base rental revenues in our total stabilized portfolio as of March 31, 2015.

Los Angeles and Ventura Counties. During the first quarter of 2015, the Los Angeles market continued to strengthen driven by the creative industries of technology and entertainment, which are seeing the largest rental increases. Our Los Angeles and Ventura Counties stabilized portfolio of 3.5 million rentable square feet was 94.3% occupied with approximately 200,000 available rentable square feet as of March 31, 2015 compared to 92.8% occupied with approximately 252,000 available rentable square feet as of December 31, 2014. The increase in occupancy is primarily due to the commencement of one new lease encompassing 77,000 square feet. Across our Los Angeles portfolio, as of March 31, 2015, we were 95.4% leased.

As of March 31, 2015, leases representing an aggregate of approximately 236,000 and 282,000 rentable square feet are scheduled to expire during the remainder of 2015 and in 2016, respectively, in this region. The aggregate rentable square feet under the leases scheduled to expire in this region during the remainder of 2015 and in 2016 represents approximately 4.3% of our occupied rentable square feet and 3.8% of our annualized base rental revenues in our total stabilized portfolio as of March 31, 2015.

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Results of Operations

Net Operating Income

Management internally evaluates the operating performance and financial results of our stabilized portfolio based on Net Operating Income from continuing operations. We define “Net Operating Income” as operating revenues (rental income, tenant reimbursements, and other property income) less operating expenses (property expenses, real estate taxes, provision for bad debts, and ground leases). As a result of the Company’s adoption of the new discontinued operations accounting guidance (see Note 1 to our consolidated financial statements included in this report for additional information), for the quarter ended March 31, 2015 Net Operating Income from continuing operations includes the Net Operating Income for the ten properties held for sale at March 31, 2015. For the quarter ended March 31, 2014, Net Operating income from continuing operations does not include the Net Operating Income for properties held for sale or disposed of in prior years because properties classified as held for sale and/or disposed of prior to January 1, 2015 will continue to be presented in discontinued operations for prior periods presented.

Net Operating Income from continuing operations is considered by management to be an important and appropriate supplemental performance measure to net income (loss) because we believe it helps both investors and management to understand the core operations of our properties excluding corporate and financing-related costs and noncash depreciation and amortization. Net Operating Income is an unlevered operating performance metric of our properties and allows for a useful comparison of the operating performance of individual assets or groups of assets. This measure thereby provides an operating perspective not immediately apparent from GAAP income (loss) from operations or net income (loss). In addition, Net Operating Income is considered by many in the real estate industry to be a useful starting point for determining the value of a real estate asset or group of assets. Other real estate companies may use different methodologies for calculating Net Operating Income, and accordingly, our presentation of Net Operating Income may not be comparable to other real estate companies. Because of the exclusion of the items shown in the reconciliation below, Net Operating Income should only be used as a supplemental measure of our financial performance and not as an alternative to GAAP income (loss) from operations or net income (loss).

Management further evaluates Net Operating Income by evaluating the performance from the following property groups:

• Same Store Properties – which includes the results of all of the office properties that were owned and included in our stabilized portfolio for two comparable reporting periods, i.e., owned and included in our stabilized portfolio as of January 1, 2014 and still owned and included in the stabilized portfolio as of March 31, 2015;

• Stabilized Development and Redevelopment Properties – which includes the results generated by the following:

◦ One development project comprising three office buildings that was completed and stabilized in the third quarter of 2014;

◦ One development project consisting of two office buildings that was completed and stabilized in the fourth quarter of 2014;

◦ One redevelopment property that was stabilized in 2014 following its one year lease-up period; and

• Acquisition Properties – which includes the results, from the dates of acquisition through the periods presented, for the five office buildings we acquired during 2014;

• Held for Sale, Disposition and Other Properties – which includes the results for both periods presented of ten properties held for sale at March 31, 2015 and expenses for certain of our in-process and future development projects.

The following table sets forth certain information regarding the property groups within our stabilized portfolio as of March 31, 2015:

Group	# of Buildings	Rentable Square Feet
Same Store Properties	90	11,281,795
Stabilized Development and Redevelopment Properties	6	1,358,338
Acquisition Properties	5	407,587
Total Stabilized Portfolio (1)	101	13,047,720

_______________

(1) The stabilized portfolio excludes ten properties held for sale that encompass 1,044,844 rentable square feet at March 31, 2015.

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Comparison of the Three Months Ended March 31, 2015 to the Three Months Ended March 31, 2014

The following table summarizes our Net Operating Income from continuing operations, as defined, for our total portfolio for the three months ended March 31, 2015 and 2014.

	Three Months Ended March 31,						Dollar Change			Percentage Change
	2015			2014
	($ in thousands)
Reconciliation to Net Income:
Net Operating Income, as defined	$	107,635		$	87,524		$	20,111		23.0	%
Unallocated (expense) income:
General and administrative expenses	(12,768		)	(10,811		)	(1,957		)	18.1
Acquisition-related expenses	(128		)	(228		)	100			(43.9	)
Depreciation and amortization	(51,487		)	(48,536		)	(2,951		)	6.1
Interest income and other net investment gains	360			177			183			103.4
Interest expense	(16,878		)	(17,252		)	374			(2.2	)
Gain on sale of land	17,268			—			17,268			100.0
Income from continuing operations	44,002			10,874			33,128			304.7
Income from discontinued operations (1)	—			91,058			(91,058		)	(100.0	)
Net income	$	44,002		$	101,932		$	(57,930	)	(56.8	)%

________________________ 

(1) The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1 to our consolidated financial statements included in this report for additional information). As a result, results of operations for properties classified as held for sale and/or disposed of subsequent to January 1, 2015 are presented in continuing operations. Prior to January 1, 2015, properties classified as held for sale and/or disposed of are presented in discontinued operations.

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The following tables summarize the Net Operating Income, as defined, for our total portfolio for the three months ended March 31, 2015 and 2014.

	Three Months Ended March 31,
	2015										2014
	Same Store		Stabilized Develop-ment & Redevel-opment		Acquisition Properties		2015 Held for Sale, Disposit-ions & Other		Total		Same Store		Stabilized Develop-ment & Redevel-opment		Acquisition Properties		2015 Held for Sale, Disposit-ions & Other		Total
	(in thousands)										(in thousands)
Operating revenues:
Rental income	$	105,382	$	16,551	$	3,899	$	5,100	$	130,932	$	100,139	$	4,350	$	407	$	5,202	$	110,098
Tenant reimbursements	10,942		2,090		484		909		14,425		10,615		192		22		690		11,519
Other property income	725		—		—		—		725		2,135		5		—		1		2,141
Total	117,049		18,641		4,383		6,009		146,082		112,889		4,547		429		5,893		123,758
Property and related expenses:
Property expenses	22,078		1,392		248		996		24,714		23,069		647		3		764		24,483
Real estate taxes	9,646		1,951		321		797		12,715		9,718		479		9		783		10,989
Provision for bad debts	218		1		—		23		242		—		—		—		—		—
Ground leases	776		—		—		—		776		762		—		—		—		762
Total	32,718		3,344		569		1,816		38,447		33,549		1,126		12		1,547		36,234
Net Operating Income, as defined	$	84,331	$	15,297	$	3,814	$	4,193	$	107,635	$	79,340	$	3,421	$	417	$	4,346	$	87,524

	Three Months Ended March 31, 2015 as compared to the Three Months Ended March 31, 2014
	Same Store					Stabilized Development & Redevelopment					Acquisition Properties				2015 Held for Sale, Dispositions & Other					Total
	Dollar Change			Percent Change		Dollar Change			Percent Change		Dollar Change		Percent Change		Dollar Change			Percent Change		Dollar Change			Percent Change
	($ in thousands)
Operating revenues:
Rental income	$	5,243		5.2	%	$	12,201		280.5	%	$	3,492	858.0	%	$	(102	)	(2.0	)%	$	20,834		18.9	%
Tenant reimbursements	327			3.1		1,898			988.5		462		2,100.0		219			31.7		2,906			25.2
Other property income	(1,410		)	(66.0	)	(5		)	(100.0	)	—		—		(1		)	(100.0	)	(1,416		)	(66.1	)
Total	4,160			3.7		14,094			310.0		3,954		921.7		116			2.0		22,324			18.0
Property and related expenses:
Property expenses	(991		)	(4.3	)	745			115.1		245		8,166.7		232			30.4		231			0.9
Real estate taxes	(72		)	(0.7	)	1,472			307.3		312		3,466.7		14			1.8		1,726			15.7
Provision for bad debts	218			100.0		1			100.0		—		—		23			100.0		242			100.0
Ground leases	14			1.8		—			—		—		—		—			—		14			1.8
Total	(831		)	(2.5	)	2,218			197.0		557		4,641.7		269			17.4		2,213			6.1
Net Operating Income, as defined	$	4,991		6.3	%	$	11,876		347.1	%	$	3,397	814.6	%	$	(153	)	(3.5	)%	$	20,111		23.0	%

Net Operating Income increased $20.1 million, or 23.0%, for the three months ended March 31, 2015 as compared to the three months ended March 31, 2014 primarily resulting from:

• An increase of $5.0 million attributable to the Same Store Properties primarily resulting from:

• An increase in rental income of $5.2 million, of which $3.4 million is due to new leases at higher rates primarily in the San Francisco Bay Area and Greater Seattle regions and $1.4 million is due to an increase in occupancy primarily in the Los Angeles and San Diego regions;

• An increase in tenant reimbursements of $0.3 million primarily due to an increase in recurring property operating expenses;

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• A partially offsetting decrease in other property income of $1.4 million primarily due to $1.8 million of lease termination fees recognized mainly from one tenant during the three months ended March 31, 2014 as compared with $0.4 million of other property income during the three months ended March 31, 2015;

• A decrease in property and related expenses of $0.8 million primarily resulting from a decrease of $1.0 million in property expenses due to the following:

◦ $1.0 million decrease in non-recurring legal fees;

◦ $0.6 million insurance reimbursement received in 2015, offset by;

◦ $0.6 million increase to contract services, repairs and maintenance, and various other reimbursable expenses;

• An increase of $11.9 million attributable to the Stabilized Development and Redevelopment Properties primarily attributable to the properties completed and/or stabilized in September and October of 2014; and

• An increase of $3.4 million attributable to the Acquisition Properties.

Other Expenses and Income

General and Administrative Expenses

General and administrative expenses increased by approximately $2.0 million, or 18.1%, for the three months ended March 31, 2015 compared to the three months ended March 31, 2014. The increase was primarily attributable to an increase in payroll and administrative costs due to increased headcount related to the growth of the Company and an increase in share-based compensation costs as a result of the change in amortization method associated with our 2014 and 2015 share-based compensation grants.

Depreciation and Amortization

Depreciation and amortization increased by approximately $3.0 million, or 6.1%, for the three months ended March 31, 2015 compared to the three months ended March 31, 2014, primarily related to increases in the Stabilized Development and Redevelopment Properties of $3.4 million and the Acquisition Properties of $1.4 million, partially offset by a decrease in the Same Store Properties of $1.6 million.

Interest Expense

The following table sets forth our gross interest expense, including debt discounts/premiums and loan cost amortization, net of capitalized interest, including capitalized debt discounts/premiums and loan cost amortization for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014			Dollar Change			Percentage Change
	(in thousands)
Gross interest expense	$	27,749		$	28,034		$	(285	)	(1.0	)%
Capitalized interest and loan fees	(10,871		)	(10,782		)	(89		)	0.8	%
Interest expense	$	16,878		$	17,252		$	(374	)	(2.2	)%

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Liquidity and Capital Resources of the Company

In this “Liquidity and Capital Resources of the Company” section, the term the “Company” refers only to Kilroy Realty Corporation on an unconsolidated basis and excludes the Operating Partnership and all other subsidiaries.

The Company’s business is operated primarily through the Operating Partnership. Distributions from the Operating Partnership are the Company’s primary source of capital. The Company believes the Operating Partnership’s sources of working capital, specifically its cash flow from operations and borrowings available under its unsecured revolving credit facility, are adequate for it to make its distribution payments to the Company and, in turn, for the Company to make its dividend payments to its preferred and common stockholders for the next twelve months. Cash flows from operating activities generated by the Operating Partnership for the three months ended March 31, 2015 were sufficient to cover the Company’s payment of cash dividends to its stockholders.However, there can be no assurance that the Operating Partnership’s sources of capital will continue to be available at all or in amounts sufficient to meet its needs, including its ability to make distributions to the Company. The unavailability of capital could adversely affect the Operating Partnership’s ability to make distributions to the Company, which would in turn, adversely affect the Company’s ability to pay cash dividends to its stockholders.

The Company is a well-known seasoned issuer and the Company and the Operating Partnership have an effective shelf registration statement that provides for the public offering and sale from time to time by the Company of its preferred stock, common stock, depositary shares, warrants and guarantees of debt securities and by the Operating Partnership of its debt securities, in each case in unlimited amounts. The Company evaluates the capital markets on an ongoing basis for opportunities to raise capital, and, as circumstances warrant, the Company and the Operating Partnership may issue securities of all of these types in one or more offerings at any time and from time to time on an opportunistic basis, depending upon, among other things, market conditions, available pricing and capital needs. When the Company receives proceeds from the sales of its preferred or common stock, it generally contributes the net proceeds from those sales to the Operating Partnership in exchange for corresponding preferred or common partnership units of the Operating Partnership. The Operating Partnership may use these proceeds and proceeds from the sale of its debt securities to repay debt, including borrowings under its unsecured revolving credit facility, to develop new or existing properties, to make acquisitions of properties or portfolios of properties, or for general corporate purposes.

As the sole general partner with control of the Operating Partnership, the Company consolidates the Operating Partnership for financial reporting purposes, and the Company does not have significant assets other than its investment in the Operating Partnership. Therefore, the assets and liabilities and the revenues and expenses of the Company and the Operating Partnership are substantially the same on their respective financial statements. The section entitled “Liquidity and Capital Resources of the Operating Partnership” should be read in conjunction with this section to understand the liquidity and capital resources of the Company on a consolidated basis and how the Company is operated as a whole.

Distribution Requirements

The Company is required to distribute 90% of its taxable income (subject to certain adjustments and excluding net capital gain) on an annual basis to maintain qualification as a REIT for federal income tax purposes and is required to pay income tax at regular corporate rates to the extent it distributes less than 100% of its taxable income (including capital gains). As a result of these distribution requirements, the Operating Partnership cannot rely on retained earnings to fund its on-going operations to the same extent as other companies whose parent companies are not REITs. In addition, the Company may be required to use borrowings under the Operating Partnership’s revolving credit facility, if necessary, to meet REIT distribution requirements and maintain its REIT status. The Company may also need to continue to raise capital in the equity markets to fund the Operating Partnership’s working capital needs, as well as potential developments of new or existing properties or acquisitions.

The Company intends to continue to make, but has not committed to make, regular quarterly cash distributions to common stockholders, and through the Operating Partnership, common unitholders from the Operating Partnership's cash flow from operating activities. All such distributions are at the discretion of the board of directors. The Company has historically distributed amounts in excess of its taxable income resulting in a return of capital to its stockholders and the Company currently believes it has the ability to maintain distributions at the 2015 levels to meet the REIT distribution requirements for 2015, before the impact of gains on real estate asset dispositions. However, there can be no assurance that the Company will have the ability to do so. In addition, to the extent that the Company cannot successfully complete Section 1031 Exchanges or enter into Section 1031 Exchanges to defer some or all of the taxable gains related to completed or future property dispositions, the Company may elect to distribute a special dividend to avoid having to pay income taxes on such gains. The Company considers market factors and its performance in addition to REIT requirements in determining its distribution levels. Amounts accumulated for distribution to stockholders are invested primarily in interest-bearing accounts and short-term interest-bearing securities, which are consistent with the Company’s

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intention to maintain its qualification as a REIT. Such investments may include, for example, obligations of the Government National Mortgage Association, other governmental agency securities, certificates of deposit and interest-bearing bank deposits.

On February 24, 2015, the Board of Directors declared a regular quarterly cash dividend of $0.35 per share of common stock payable on April 15, 2015 to stockholders of record on March 31, 2015 and caused a $0.35 per Operating Partnership unit cash distribution to be paid in respect of the Operating Partnership’s common limited partnership interests, including those owned by the Company. The total cash quarterly dividends and distributions paid on April 15, 2015 was$31.4 million.

On February 24, 2015, the Board of Directors declared a dividend of $0.42969 per share on the Series G Preferred Stock and $0.39844 per share on the Series H Preferred Stock for the period commencing on and including February 16, 2015 and ending on and including May 14, 2015. The dividend will be payable on May 15, 2015 to Series G Preferred and Series H Preferred stockholders of record on April 30, 2015. The quarterly dividends payable on May 15, 2015 to Series G and Series H Preferred stockholders is expected to total $3.3 million.

Debt Covenants

The covenants contained within the unsecured revolving credit facility, unsecured term loan facility and unsecured term loan generally prohibit the Company from paying dividends in excess of 95% of FFO.

Capitalization

As of March 31, 2015, our total debt as a percentage of total market capitalization was 25.6% and our total debt and liquidation value of our preferred equity as a percentage of total market capitalization was 27.8%, which was calculated based on the closing price per share of the Company’s common stock of $76.17 on March 31, 2015 as shown in the following table:

	Shares/Units at  March 31, 2015	Aggregate Principal Amount or $ Value Equivalent		% of Total Market Capitalization
	($ in thousands)
Debt:
Unsecured Revolving Credit Facility		$	130,000	1.4	%
Unsecured Term Loan Facility		150,000		1.6
Unsecured Term Loan		39,000		0.4
Unsecured Senior Notes due 2015 (1)		325,000		3.4
Unsecured Senior Notes due 2018 (1)		325,000		3.4
Unsecured Senior Notes due 2020 (1)		250,000		2.6
Unsecured Senior Notes due 2023 (1)		300,000		3.2
Unsecured Senior Notes due 2029 (1)		400,000		4.2
Secured debt (3)		507,550		5.4
Total debt		2,426,550		25.6
Equity and Noncontrolling Interests:
6.875% Series G Cumulative Redeemable Preferred stock (2)	4,000,000	100,000		1.1
6.375% Series H Cumulative Redeemable Preferred stock (2)	4,000,000	100,000		1.1
Common limited partnership units outstanding (3)(4)	1,793,170	136,586		1.4
Common shares outstanding (4)	88,031,377	6,705,350		70.8
Total equity and noncontrolling interests		7,041,936		74.4
Total Market Capitalization		$	9,468,486	100.0	%

________________________ 

(1) Represents gross aggregate principal amount due at maturity before the effect of net unamortized premiums as of March 31, 2015. The aggregate net unamortized premiums totaled approximately $3.5 million as of March 31, 2015.

(2) Value based on $25.00 per share liquidation preference.

(3) Represents common units not owned by the Company.     

(4) Value based on closing price per share of our common stock of $76.17 as of March 31, 2015.

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Liquidity and Capital Resources of the Operating Partnership

In this “Liquidity and Capital Resources of the Operating Partnership” section, the terms “we,” “our,” and “us” refer to the Operating Partnership or the Operating Partnership and the Company together, as the context requires.

General

Our primary liquidity sources and uses are as follows:

Liquidity Sources

• Net cash flow from operations;

• Borrowings under the Operating Partnership’s unsecured revolving credit facility and term loan facility;

• Proceeds from additional secured or unsecured debt financings;

• Proceeds from public or private issuance of debt or equity securities; and

• Proceeds from the disposition of assets through our capital recycling program.

Liquidity Uses

• Development and redevelopment costs;

• Property or undeveloped land acquisitions;

• Property operating and corporate expenses;

• Capital expenditures, tenant improvement and leasing costs;

• Debt service and principal payments, including debt maturities;

• Distributions to common and preferred security holders; and

• Outstanding debt repurchases.

General Strategy

Our general strategy is to maintain a conservative balance sheet with a strong credit profile and to maintain a capital structure that allows for financial flexibility and diversification of capital resources. We manage our capital structure to reflect a long-term investment approach and utilize multiple sources of capital to meet our long-term capital requirements. We believe that our current projected liquidity requirements for the next twelve-month period, as set forth above under the caption “—Liquidity Uses,” will be satisfied using a combination of the liquidity sources listed above, although there can be no assurance in this regard. We believe our conservative leverage and staggered debt maturities provide us with financial flexibility and enhances our ability to obtain additional sources of liquidity if necessary, and, therefore, we are well-positioned to refinance or repay maturing debt and to pursue our strategy of seeking attractive acquisition opportunities, which we may finance, as necessary, with future public and private issuances of debt and equity securities.

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Liquidity Sources

Unsecured Revolving Credit Facility

The following table summarizes the balance and terms of our unsecured revolving credit facility as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Outstanding borrowings	$	130,000		$	140,000
Remaining borrowing capacity	470,000			460,000
Total borrowing capacity (1)(2)	$	600,000		$	600,000
Interest rate (2)	1.43		%	1.41		%
Facility fee-annual rate (3)	0.250%
Maturity date (2)	July 2019

_______________

(1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $311.0 million under an accordion feature under the terms of the unsecured revolving credit facility and unsecured term loan facility.

(2) Our unsecured revolving credit facility interest rate was calculated based on an annual rate of LIBOR plus 1.250% as of March 31, 2015 and December 31, 2014.

(3) Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of March 31, 2015, $5.6 million of deferred financing costs remains to be amortized through the maturity date of our unsecured revolving credit facility.

We intend to borrow under the unsecured revolving credit facility from time to time for general corporate purposes, to fund potential acquisitions, to finance development and redevelopment expenditures and to potentially repay long-term debt.

Capital Recycling Program

In connection with our capital recycling program, we continuously evaluate opportunities for the potential disposition of properties and undeveloped land in our portfolio with the intent of recycling the proceeds generated from the disposition of less strategic or lower return assets into capital used to finance development expenditures, to fund new acquisitions, to repay long-term debt and for other general corporate purposes. As part of this strategy, we attempt to enter into Section 1031 Exchanges, when possible, to defer some or all of the taxable gains on the sales, if any, for federal and state income tax purposes. We cannot assure you that we will dispose of any additional properties or that any acquisitions and/or dispositions will qualify as Section 1031 Exchanges.

In connection with our capital recycling strategy, during the three months ended March 31, 2015, we completed the sale of a land parcel located at 17150 Von Karman in Irvine, California for gross sales proceeds of $26.0 million. In addition, as of March 31, 2015, we classified ten properties as held for sale (one located in Redmond, Washington and nine located in San Diego, California). Four of these properties were sold in April 2015 and the remaining six properties are expected to be sold at the end of the second quarter of 2015 for an aggregate total gross proceeds of approximately $309.2 million. (See “—Factors that May Influence Future Operations” included in this report for additional information). During 2014, we completed the sale of 17 properties and one undeveloped land parcel to unaffiliated third parties in six separate transactions for gross sales proceeds totaling approximately $432.6 million.

Upon the completion of the sale of the ten properties held for sale, we will have disposed of real estate assets totaling $335.2 million thus far in 2015, which is within our initial 2015 capital recycling target range of $250.0 million to $400.0 million of less-strategic asset sales. However, the timing of any potential future disposition transactions will depend on market conditions and other factors including but not limited to our capital needs and our ability to potentially defer some or all of the taxable gains on the sales. We cannot assure you that we will dispose of any additional properties or that future acquisitions and/or dispositions, if any, will qualify as Section 1031 Exchanges.

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At-The-Market Stock Offering Program

The following table sets forth information regarding sales of our common stock under our at-the-market stock offering program for the three months ended March 31, 2015:

	Three months  ended March 31, 2015
	(in millions, except share and per share data)
Shares of common stock sold during the three month period	1,507,393
Weighted average price per common share	$	76.09
Aggregate gross proceeds	$	114.7
Aggregate net proceeds after sales agent compensation	$	113.2

The proceeds from the sales were used to fund acquisitions, development expenditures and general corporate purposes including repayment of borrowings under the unsecured revolving credit facility. Since commencement of this program in December 2014, through March 31, 2015, we have sold 1,648,893 shares of common stock having an aggregate gross sales price of $124.7 million, and approximately $175.3 million remained available to be sold under this program. Actual future sales will depend upon a variety of factors, including but not limited to, market conditions, the trading price of the Company’s common stock and our capital needs. We have no obligation to sell the remaining shares available for sale under this program.

Shelf Registration Statement

As discussed above under “—Liquidity and Capital Resources of the Company,” the Company is a well-known seasoned issuer and the Company and the Operating Partnership have an effective shelf registration statement that provides for the public offering and sale from time to time by the Company of its preferred stock, common stock, depository shares and guarantees of debt securities and by the Operating Partnership of its debt securities, in each case in unlimited amounts. The Company evaluates the capital markets on an ongoing basis for opportunities to raise capital, and, as circumstances warrant, the Company and the Operating Partnership may issue securities of all of these types in one or more offerings at any time and from time to time on an opportunistic basis, depending upon, among other things, market conditions, available pricing and capital needs. When the Company receives proceeds from the sales of its preferred or common stock, it generally contributes the net proceeds from those sales to the Operating Partnership in exchange for corresponding preferred or common partnership units of the Operating Partnership. The Operating Partnership may use these proceeds and proceeds from the sale of its debt securities to repay debt, including borrowings under its unsecured revolving credit facility, to develop new or existing properties, to make acquisitions of properties or portfolios of properties, or for general corporate purposes.

Unsecured and Secured Debt

The aggregate principal amount of our unsecured debt and secured debt of the Operating Partnership outstanding as of March 31, 2015 was as follows:

	Aggregate Principal  Amount Outstanding
	(in thousands)
Unsecured Revolving Credit Facility	$	130,000
Unsecured Term Loan Facility	150,000
Unsecured Term Loan	39,000
Unsecured Senior Notes due 2015 (1)	325,000
Unsecured Senior Notes due 2018 (1)	325,000
Unsecured Senior Notes due 2020 (1)	250,000
Unsecured Senior Notes due 2023 (1)	300,000
Unsecured Senior Notes due 2029 (1)	400,000
Secured Debt(1)	507,550
Total Unsecured and Secured Debt	$	2,426,550

________________________

(1) Represents gross aggregate principal amount before the effect of the unamortized discounts and premiums as of March 31, 2015. The aggregate net unamortized premiums totaled approximately $3.5 million as of March 31, 2015.

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Debt Composition

The composition of the Operating Partnership’s aggregate debt balances between secured and unsecured and fixed-rate and variable-rate debt as of March 31, 2015 and December 31, 2014 was as follows:

	Percentage of Total Debt				Weighted Average Interest Rate
	March 31, 2015		December 31, 2014		March 31, 2015		December 31, 2014
Secured vs. unsecured (1):
Unsecured	79.1	%	78.3	%	4.3	%	4.2	%
Secured	20.9	%	21.7	%	5.2	%	5.2	%
Variable-rate vs. fixed-rate (1):
Variable-rate	13.2	%	13.4	%	1.5	%	1.5	%
Fixed-rate	86.8	%	86.6	%	4.9	%	4.9	%
Stated rate (1)					4.4	%	4.4	%
GAAP effective rate (2)					4.3	%	4.3	%
GAAP effective rate including debt issuance costs					4.5	%	4.5	%

________________________

(1) Excludes the impact of the amortization of any debt discounts/premiums.

(2) Includes the impact of the amortization of any debt discounts/premiums, excluding debt issuance costs.

Liquidity Uses

Contractual Obligations

The following table provides information with respect to our contractual obligations as of March 31, 2015. The table: (i) indicates the maturities and scheduled principal repayments of our secured and unsecured debt; (ii) indicates the scheduled interest payments of our fixed-rate and variable-rate debt as of March 31, 2015; (iii) provides information about the minimum commitments due in connection with our ground lease obligations and other lease and contractual commitments; and (iv) provides estimated development commitments as of March 31, 2015. Note that the table does not reflect our available debt maturity extension options and reflects gross aggregate principal amounts before the effect of unamortized discounts/premiums.

	Payment Due by Period
	Less than 1 Year (Remainder of 2015)		2-3 Years (2016-2017)		4-5 Years (2018-2019)		More than 5 years (After 2019)		Total
	(in thousands)
Principal payments: secured debt (1)	$	41,630	$	171,179	$	203,097	$	91,644	$	507,550
Principal payments: unsecured debt (2)	325,000		—		644,000		950,000		1,919,000
Interest payments: fixed-rate debt (3)	75,332		118,902		95,594		235,539		525,367
Interest payments: variable-rate debt (4)	2,250		5,972		4,467		—		12,689
Interest payments: unsecured revolving credit facility (5)	1,401		3,718		2,781		—		7,900
Ground lease obligations (6)	2,340		6,240		6,240		154,358		169,178
Lease and contractual commitments (7)	74,625		—		—		—		74,625
Development commitments (8)	292,000		46,000		—		—		338,000
Total	$	814,578	$	352,011	$	956,179	$	1,431,541	$	3,554,309

________________________

(1) Represents gross aggregate principal amount before the effect of the unamortized premium of approximately $9.2 million as of March 31, 2015.

(2) Represents gross aggregate principal amount before the effect of the unamortized discount of approximately $5.7 million as of March 31, 2015.

(3) As of March 31, 2015, 86.8% of our debt was contractually fixed. The information in the table above reflects our projected interest rate obligations for these fixed-rate payments based on the contractual interest rates, interest payment dates and scheduled maturity dates.

(4) As of March 31, 2015, 7.8% of our debt bore interest at variable rates which was incurred under the term loan facility. The variable interest rate payments are based on LIBOR plus a spread of 1.400% as of March 31, 2015. The information in the table above reflects our projected interest rate obligations for these variable-rate payments based on outstanding principal balances as of March 31, 2015, the scheduled interest payment dates and the contractual maturity dates.

(5) As of March 31, 2015, 5.4% of our debt bore interest at variable rates which was incurred under the unsecured revolving credit facility. The variable interest rate payments are based on LIBOR plus a spread of 1.250% as of March 31, 2015. The information in the table above reflects our projected interest rate obligations for these variable-rate payments based on outstanding principal balances as of March 31, 2015, the scheduled interest payment dates and the contractual maturity dates.

(6) Reflects minimum lease payments through the contractual lease expiration date before the impact of extension options.

(7) Amounts represent commitments under signed leases and contracts for operating properties, excluding tenant-funded tenant improvements. The timing of these expenditures may fluctuate.

(8) Amounts represent commitments under signed leases for pre-leased development projects and contractual commitments for projects under construction as of March 31, 2015. The timing of these expenditures may fluctuate based on the ultimate progress of construction. We may start additional construction during the remainder of 2015 (see “—Development” for additional information).

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Other Liquidity Uses

Debt Maturities

As of March 31, 2015, we had unsecured debt with principal balances of $325.0 million scheduled to mature in November 2015. We believe our conservative leverage and staggered debt maturities provide us with financial flexibility and enhance our ability to obtain additional sources of liquidity if necessary, and, therefore, we believe we are well-positioned to refinance or repay maturing debt and to pursue our strategy of seeking attractive acquisition opportunities, which we may finance, as necessary, with future public and private issuances of debt and equity securities.

Development Activities

As of March 31, 2015, we had six development projects under construction. These projects have a total estimated investment of approximately $1.1 billion, of which we have incurred approximately $654.5 million and committed an additional $338.0 million as of March 31, 2015. In addition, we currently have additional development projects that we may commence construction on in 2015, depending on market conditions. We currently believe we could potentially spend $50.0 to $75.0 million during 2015 in addition to the amount committed as of March 31, 2015. This total estimated investment is based on market conditions and our anticipation of project approvals. Actual costs could vary depending on changes in circumstances. Ultimate timing of these expenditures may fluctuate given the ultimate progress and leasing status of the projects.

Potential Future Acquisitions

We continue to monitor our target markets and evaluate the acquisition of value add development opportunities and operating properties that we expect to add immediate Net Operating Income to our portfolio or play a strategic role in our future growth.

Other Potential Future Liquidity Uses

We remain a disciplined buyer of development opportunities and office properties and continue to focus on value add opportunities in West Coast markets populated by knowledge and creative based tenants in a variety of industries, including technology, media, healthcare, entertainment and professional services. We expect that any material acquisitions or development activities will be funded with borrowings under the unsecured revolving credit facility, the public or private issuance of debt or equity securities, the disposition of assets under our capital recycling program or through the assumption of existing debt.

In addition, the amounts we are required to spend on tenant improvements and leasing costs we ultimately incur will depend on actual leasing activity. Tenant improvements and leasing costs generally fluctuate in any given period depending on factors such as the type of property, the term of the lease, the type of the lease, the involvement of external leasing agents, and overall market conditions. Capital expenditures may fluctuate in any given period subject to the nature, extent, and timing of improvements required to maintain or improve our properties.

Factors That May Influence Future Sources of Capital and Liquidity of the Company and the Operating Partnership

We continue to evaluate sources of financing for our business activities, including borrowings under the unsecured revolving credit facility, issuance of public and private equity securities, unsecured debt and fixed-rate secured mortgage financing and proceeds from the disposition of selective assets through our capital recycling program. However, our ability to obtain new financing or refinance existing borrowings on favorable terms could be impacted by various factors, including the state of economic conditions, the state of the credit and equity markets, significant tenant defaults, a decline in the demand for office properties, a decrease in market rental rates or market values of real estate assets in our submarkets and the amount of future borrowings. These events could result in the following:

• Decreases in our cash flows from operations, which could create further dependence on the unsecured revolving credit facility;

• An increase in the proportion of variable-rate debt, which could increase our sensitivity to interest rate fluctuations in the future; and

• A decrease in the value of our properties, which could have an adverse effect on the Operating Partnership’s ability to incur additional debt, refinance existing debt at competitive rates or comply with its existing debt obligations.

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In addition to the factors noted above, the Operating Partnership’s credit ratings are subject to ongoing evaluation by credit rating agencies and may be changed or withdrawn by a rating agency in the future if, in its judgment, circumstances warrant. In the event that the Operating Partnership’s credit ratings are downgraded, we may incur higher borrowing costs and may experience difficulty in obtaining additional financing or refinancing existing indebtedness.

Debt Covenants

The unsecured revolving credit facility, unsecured term loan facility, unsecured term loan, unsecured senior notes and certain other secured debt arrangements contain covenants and restrictions requiring us to meet certain financial ratios and reporting requirements. Key existing financial covenants and their covenant levels include:

Unsecured Credit Facility, Unsecured Term Loan Facility and Unsecured Term Loan (as defined in the applicable Credit Agreements):	Covenant Level	Actual Performance as of March 31, 2015
Total debt to total asset value	less than 60%	31%
Fixed charge coverage ratio	greater than 1.5x	2.6x
Unsecured debt ratio	greater than 1.67x	2.89x
Unencumbered asset pool debt service coverage	greater than 1.75x	3.62x
Unsecured Senior Notes due 2015, 2018, 2020, 2023 and 2029 (as defined in the applicable Indentures):
Total debt to total asset value	less than 60%	38%
Interest coverage	greater than 1.5x	5.4x
Secured debt to total asset value	less than 40%	8%
Unencumbered asset pool value to unsecured debt	greater than 150%	275%

The Operating Partnership was in compliance with all of its debt covenants as of March 31, 2015. Our current expectation is that the Operating Partnership will continue to meet the requirements of its debt covenants in both the short and long term. However, in the event of a renewed economic slowdown or continued volatility in the credit markets, there is no certainty that the Operating Partnership will be able to continue to satisfy all of the covenant requirements.

Consolidated Historical Cash Flow Summary

The following summary discussion of our consolidated historical cash flow is based on the consolidated statements of cash flows in Item 1. “Financial Statements” and is not meant to be an all-inclusive discussion of the changes in our cash flow for the periods presented below. The cash flow amounts shown below include the activities of discontinued operations. Our historical cash flow activity for the three months ended March 31, 2015 as compared to the three months ended March 31, 2014 is as follows:

	Three Months Ended March 31,
	2015			2014			Dollar Change			Percentage Change
	($ in thousands)
Net cash provided by operating activities	$	54,979		$	45,081		$	9,898		22.0	%
Net cash (used in) provided by investing activities	(77,309		)	97,278			(174,587		)	(179.5	)%
Net cash provided by (used in) financing activities	48,730			(82,202		)	130,932			159.3	%

Operating Activities

Our cash flows from operating activities depend on numerous factors including the occupancy level of our portfolio, the rental rates achieved on our leases, the collectability of rent and recoveries from our tenants, the level of operating expenses, the impact of property acquisitions, completed development projects and related financing activities, and other general and administrative costs. Our net cash provided by operating activities increased by $9.9 million, or 22.0%, for the three months ended March 31, 2015 compared to the three months ended March 31, 2014 primarily as a result of an increase in cash Net Operating Income generated from our Stabilized Development and Redevelopment, Same Store and Acquisition Portfolios. See additional information under the caption “—Results of Operations.”

45

Investing Activities

Our cash flows from investing activities is generally used to fund development and operating property acquisitions, expenditures for development projects, and recurring and nonrecurring capital expenditures for our operating properties, net of proceeds received from dispositions of real estate assets. For the three months ended March 31, 2015, we had net cash used in investing activities of $77.3 million as compared to net cash provided by investing activities of $97.3 million for the three months ended March 31, 2014. This period over period change was due primarily to higher proceeds received from dispositions for the quarter ended March 31, 2014 as compared to the quarter ended March 31, 2015, partially offset by lower acquisitions for the quarter ended March 31, 2015 as compared to March 31, 2014.

Financing Activities

Our cash flows from financing activities is principally impacted by our capital raising activities, net of dividends and distributions paid to common and preferred security holders. For the three months ended March 31, 2015, we had net cash provided by financing activities of $48.7 million as compared to net cash used in financing activities of $82.2 million for the three months ended March 31, 2014. This period over period change was due primarily to our ATM equity issuance activity during the three months ended March 31, 2015.

Off-Balance Sheet Arrangements

As of March 31, 2015 and as of the date this report was filed, we did not have any off-balance sheet transactions, arrangements or obligations, including contingent obligations.

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Non-GAAP Supplemental Financial Measure: Funds From Operations

We calculate FFO in accordance with the White Paper on FFO approved by the Board of Governors of NAREIT. The White Paper defines FFO as net income or loss calculated in accordance with GAAP, excluding extraordinary items, as defined by GAAP, gains and losses from sales of depreciable real estate and impairment write-downs associated with depreciable real estate, plus real estate-related depreciation and amortization (excluding amortization of deferred financing costs and depreciation of non-real estate assets) and after adjustment for unconsolidated partnerships and joint ventures. Our calculation of FFO includes the amortization of deferred revenue related to tenant-funded tenant improvements and excludes the depreciation of the related tenant improvement assets.

We believe that FFO is a useful supplemental measure of our operating performance. The exclusion from FFO of gains and losses from the sale of operating real estate assets allows investors and analysts to readily identify the operating results of the assets that form the core of our activity and assists in comparing those operating results between periods. Also, because FFO is generally recognized as the industry standard for reporting the operations of REITs, it facilitates comparisons of operating performance to other REITs. However, other REITs may use different methodologies to calculate FFO, and accordingly, our FFO may not be comparable to all other REITs.

Implicit in historical cost accounting for real estate assets in accordance with GAAP is the assumption that the value of real estate assets diminishes predictably over time. Since real estate values have historically risen or fallen with market conditions, many industry investors and analysts have considered presentations of operating results for real estate companies using historical cost accounting alone to be insufficient. Because FFO excludes depreciation and amortization of real estate assets, we believe that FFO along with the required GAAP presentations provides a more complete measurement of our performance relative to our competitors and a more appropriate basis on which to make decisions involving operating, financing and investing activities than the required GAAP presentations alone would provide.

However, FFO should not be viewed as an alternative measure of our operating performance because it does not reflect either depreciation and amortization costs or the level of capital expenditures and leasing costs necessary to maintain the operating performance of our properties, which are significant economic costs and could materially impact our results from operations.

The following table presents our FFO for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015		2014
	(in thousands)
Net income available to common stockholders	$	39,874	$	96,532
Adjustments:
Net income attributable to noncontrolling common units of the Operating Partnership	815		2,087
Depreciation and amortization of real estate assets	50,843		48,717
Gains on dispositions of depreciable real estate	—		(90,115		)
Funds From Operations(1)(2)	$	91,532	$	57,221

________________________

(1) Reported amounts are attributable to common stockholders and common unitholders.

(2) FFO includes amortization of deferred revenue related to tenant-funded tenant improvements of $3.0 million and $2.4 million for the three months ended March 31, 2015 and 2014, respectively.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Information about our market risk is disclosed in Part II, Item 7A, of our Annual Report on Form 10-K for the fiscal year ended December 31, 2014, and is incorporated herein by reference. There have been no material changes for the three months ended March 31, 2015, to the information provided in Part II, Item 7A, of our Annual Report on Form 10-K for the fiscal year ended December 31, 2014.

ITEM 4.CONTROLS AND PROCEDURES

Kilroy Realty Corporation

The Company maintains disclosure controls and procedures (as defined in Rule 13a-15(e) or Rule 15d-15(e) under the Exchange Act) that are designed to ensure that information required to be disclosed in the Company’s reports under the Exchange Act is processed, recorded, summarized and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As required by SEC Rule 13a-15(b), the Company carried out an evaluation, under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the disclosure controls and procedures as of March 31, 2015, the end of the period covered by this report. Based on the foregoing, the Company’s Chief Executive Officer and Chief Financial Officer concluded, as of that time, that disclosure controls and procedures were effective at the reasonable assurance level.

There have been no significant changes that occurred during the quarter covered by this report in the Company’s internal control over financial reporting identified in connection with the evaluation referenced above that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Kilroy Realty, L.P.

The Operating Partnership maintains disclosure controls and procedures (as defined in Rule 13a-15(e) or Rule 15d-15(e) under the Exchange Act) that are designed to ensure that information required to be disclosed in the Operating Partnership’s reports under the Exchange Act is processed, recorded, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As required by SEC Rule 13a-15(b), the Operating Partnership carried out an evaluation, under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the disclosure controls and procedures as of March 31, 2015, the end of the period covered by this report. Based on the foregoing, the Operating Partnership’s Chief Executive Officer and Chief Financial Officer concluded, as of that time, that disclosure controls and procedures were effective at the reasonable assurance level.

There have been no significant changes that occurred during the quarter covered by this report in the Operating Partnership’s internal control over financial reporting identified in connection with the evaluation referenced above that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II – OTHER INFORMATION

ITEM 1.    LEGAL PROCEEDINGS

We and our properties are subject to routine litigation incidental to our business. These matters are generally covered by insurance. As of March 31, 2015, we are not a defendant in, and our properties are not subject to, any legal proceedings that we believe, if determined adversely to us, would have a material adverse effect upon our financial condition, results of operations or cash flows.

ITEM 1A. RISK FACTORS

There have been no material changes to the risk factors included in the Company’s and the Operating Partnership’s annual report on Form 10-K for the year ended December 31, 2014.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

(a) Recent Sales of Unregistered Securities: None.

(b) Use of Proceeds from Registered Securities: None.

(c) Purchases of Equity Securities by the Issuer and Affiliated Purchasers: None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

None.

ITEM 5. OTHER INFORMATION

None.

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ITEM 6. EXHIBITS

Exhibit Number	Description
3.(i)1	Kilroy Realty Corporation Articles of Restatement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended June 30, 2012)
3.(i)2	Certificate of Limited Partnership of Kilroy Realty, L.P. (previously filed by Kilroy Realty, L.P., as an exhibit to the General Form for Registration of Securities on Form 10 as filed with the Securities and Exchange Commission on August 18, 2010)
3.(i)3	Amendment to the Certificate of Limited Partnership of Kilroy Realty, L.P. (previously filed by Kilroy Realty, L.P., as an exhibit to the General Form for Registration of Securities on Form 10 as filed with the Securities and Exchange Commission on August 18, 2010)
3.(i)4	Articles Supplementary designating Kilroy Realty Corporation's 6.375% Series H Cumulative Redeemable Preferred Stock (previously filed by Kilroy Realty Corporation on Form 8-A as filed with the Securities and Exchange Commission on August 10, 2012)
3.(ii)1	Third Amended and Restated Bylaws of Kilroy Realty Corporation (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 11, 2014)
3.(ii)2	Seventh Amended and Restated Agreement of Limited Partnership of Kilroy Realty, L.P. dated as of August 15, 2012, as amended (previously filed by Kilroy Realty Corporation on Form 10-Q for the quarter ended June 30, 2014)
10.1*	Form of Performance-Vest Restricted Stock Unit Agreement
10.2*	Form of Restricted Stock Unit Agreement
10.3*	Form of Restricted Stock Unit Agreement for Non-Employee Members of the Board of Directors
31.1*	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer of Kilroy Realty Corporation
31.2*	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer of Kilroy Realty Corporation
31.3*	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer of Kilroy Realty, L.P.
31.4*	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer of Kilroy Realty, L.P.
32.1*	Section 1350 Certification of Chief Executive Officer of Kilroy Realty Corporation
32.2*	Section 1350 Certification of Chief Financial Officer of Kilroy Realty Corporation
32.3*	Section 1350 Certification of Chief Executive Officer of Kilroy Realty, L.P.
32.4*	Section 1350 Certification of Chief Financial Officer of Kilroy Realty, L.P.
101.1	The following Kilroy Realty Corporation and Kilroy Realty, L.P. financial information for the quarter ended March 31, 2015, formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets (unaudited), (ii) Consolidated Statements of Operations (unaudited), (iii) Consolidated Statements of Equity (unaudited), (iv) Consolidated Statements of Capital (unaudited), (v) Consolidated Statements of Cash Flows (unaudited) and (vi) Notes to the Consolidated Financial Statements (unaudited).(1)

_______________

* Filed herewith

(1) Pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933 or Section 18 of the Securities Exchange Act of 1934 and otherwise are not subject to liability under these sections.

50

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on April 30, 2015.

KILROY REALTY CORPORATION
	By:	/s/ John Kilroy
		John Kilroy President and Chief Executive Officer (Principal Executive Officer)
	By:	/s/ Tyler H. Rose
		Tyler H. Rose Executive Vice President and Chief Financial Officer (Principal Financial Officer)
	By:	/s/ Heidi R. Roth
		Heidi R. Roth Executive Vice President, Chief Accounting Officer and Controller (Principal Accounting Officer)

51

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on April 30, 2015.

KILROY REALTY, L.P.
BY:	KILROY REALTY CORPORATION
	Its general partner
	By:	/s/ John Kilroy
		John Kilroy President and Chief Executive Officer (Principal Executive Officer)
	By:	/s/ Tyler H. Rose
		Tyler H. Rose Executive Vice President and Chief Financial Officer (Principal Financial Officer)
	By:	/s/ Heidi R. Roth
		Heidi R. Roth Executive Vice President, Chief Accounting Officer and Controller (Principal Accounting Officer)

52

EX-10.1

Exhibit 10.1

KILROY REALTY CORPORATION
2006 INCENTIVE AWARD PLAN

RESTRICTED STOCK UNIT AGREEMENT

GRANT NOTICE

Kilroy Realty Corporation (the “Company”) has granted to the Participant named below an award of Restricted Stock Units (“RSUs”). The terms and conditions of the award are set forth in this Grant Notice (the “Grant Notice”), and Appendices A and B attached hereto and incorporated herein by this reference (collectively, this “Agreement”).

Participant: [_______] (the “Participant”)

Grant Date: [_______] (the “Grant Date”)

Total Number of RSUs: [_____]

Of the total number of RSUs, [__________] are “Time-Vest RSUs” and [__________] are “Performance-Vest RSUs.”    

Vesting Dates: [The Time-Vest RSUs shall vest in three (3) substantially equal installments (rounded down to the nearest whole RSU until the last installment) on each of [January 5, 2016], [January 5, 2017] and [January 5, 2018].]

[The Performance-Vest RSUs are subject to performance- and time-based vesting requirements. The performance-based vesting requirements are set forth on Appendix B attached hereto, and to the extent such performance requirements are satisfied, the Eligible Performance-Vest RSUs (as defined in Appendix B) shall vest in one lump sum (rounded down to the nearest whole RSU) on the first date on which the Committee determines that the performance vesting conditions applicable to such RSUs have been achieved by the Company as provided in Appendix B.]

The RSUs are subject to accelerated vesting in connection with certain changes in control of the Company or certain terminations of the Participant’s employment as and to the extent provided herein.

Time-Vest RSUs Deferral Election: Participant elected [not to defer any distribution of the Time-Vest RSUs] [a deferred distribution of the Time-Vest RSUs but with no fixed-date election] [a deferred distribution of the RSUs with a fixed-date election of ____________, ___] pursuant to Participant’s [2015] Restricted Stock Unit Deferral Election Form dated [December __, 2014] (the “Deferral Election Form”).

Performance-Vest RSUs DeferralElection: Participant elected [not to defer any distribution of the Performance-Vest RSUs] [a deferred distribution of the Performance-Vest RSUs but with no fixed-date election] [a deferred distribution of the Performance-Vest RSUs with a fixed-date election of ____________, ___] pursuant to the Deferral Election Form.

The award is granted under and is further subject to the terms and conditions of the Company’s 2006 Incentive Award Plan (as amended from time to time, the “Plan”), incorporated herein by this reference. The Participant acknowledges having received and read, and understands, the Plan and this Agreement. The Participant agrees to the terms and conditions of the award as set forth in this Agreement. If the Participant is married, his or her spouse must also sign the Consent of Spouse set forth below.

[The Participant consents to the reduction in his target incentive opportunity for his [2015] Annual Cash Award (as such term is defined in his Employment Agreement) to the level approved by the Committee on or about the Grant Date and previously communicated to the Participant.]

KILROY REALTY CORPORATION, a Maryland corporation ________________________________ Name: __________________________ Title: ___________________________	PARTICIPANT: ____________________________________ Printed Name: ________________________
KILROY REALTY CORPORATION, a Maryland corporation ________________________________ Name: __________________________ Title: ___________________________

CONSENT OF SPOUSE

I, ____________________, spouse of ____________________, have read and approve this Agreement. In consideration of issuing to my spouse the Restricted Stock Units and Dividend Equivalent rights set forth in this Agreement, I hereby appoint my spouse as my attorney-in-fact in respect to the exercise of any rights under this Agreement and agree to be bound by the provisions of the Agreement insofar as I may have any rights in said Agreement and any Restricted Stock Units, Dividend Equivalent rights, shares of Kilroy Realty Corporation or cash issued pursuant thereto under the community property laws or similar laws relating to marital property in effect in the state of our residence as of the date of the signing of this Agreement.

Dated: _______________, _____            ________________________________

Signature of Spouse

2

APPENDIX A

TERMS AND CONDITIONS OF

RESTRICTED STOCK UNITS AND DIVIDEND EQUIVALENT RIGHTS

1.    Grant. The effective date of the award is the Grant Date. The total number of RSUs subject to the award is the total number of RSUs set forth in the Grant Notice. Except as otherwise expressly provided herein, all capitalized terms used in this Agreement and not otherwise defined shall have the meanings provided in the Plan or in Appendix B.

2.    RSUs. Each RSU that vests in accordance with this Agreement shall represent the right to receive, as determined by the Committee in accordance with Section 6 below, either (i) a payment of one share of Stock or (ii) a payment in cash equal to the Fair Market Value of one share of Stock on the applicable Distribution Date (as defined below). Prior to actual payment in respect of any vested RSU, such RSU will represent an unsecured obligation of the Company, payable (if at all) only from the general assets of the Company.

3.    Dividend Equivalent Rights.

(a)    Each RSU granted hereunder is hereby granted in tandem with a corresponding Dividend Equivalent right. Such Dividend Equivalent right shall entitle the Participant to have a hypothetical bookkeeping account (established and maintained for purposes of tracking the RSUs and any additional RSUs credited to such account in respect of Dividend Equivalent rights in accordance with this Section 3 (the “Account”)) that is credited upon the Company’s payment of dividends to stockholders of outstanding shares of Stock if the Dividend Equivalent right is or was outstanding on the applicable Stock record date. Subject to Section 3(c) below, when such dividends are so declared, the following shall occur:

(i)    on the date that the Company pays a cash dividend in respect of outstanding shares of Stock, the Company shall credit the Participant’s Account with a number of full and fractional RSUs equal to the quotient of (A) the total number of RSUs credited to the Account but not yet distributed (including any RSUs granted hereunder and any additional RSUs credited with respect to Dividend Equivalent rights), multiplied by the per share dollar amount of such dividend, divided by (B) the Fair Market Value of a share of Stock on the date such dividend is paid,

(ii)    on the date that the Company pays a Stock dividend in respect of outstanding shares of Stock, the Company shall credit the Participant’s Account with a number of full and fractional RSUs equal to the product of (A) the total number of RSUs credited to the Account but not yet distributed (including any RSUs granted hereunder and any additional RSUs credited with respect to Dividend Equivalent rights), multiplied by (B) the number of shares of Stock distributed with respect to such dividend per share of Stock, or

(iii)    on the date that the Company pays any other type of distribution in respect of outstanding shares of Stock, the Company shall credit the Participant’s Account in an equitable manner based on the total number of RSUs held in the Account, as determined in the sole discretion of the Committee.

(b)    To the extent that any additional RSUs are credited to the Participant’s Account in respect of the Participant’s Dividend Equivalent rights, such additional RSUs shall be subject to the same vesting terms as the original RSUs to which they relate (e.g., additional RSUs credited in respect of Time-Vest RSUs will be subject to the same time-based vesting requirements as the underlying Time-Vest RSUs, while additional RSUs credited in respect of Performance-Vest RSUs will be subject to the same performance- and time-based vesting requirements as the underlying Performance-Vest RSUs) and shall also carry corresponding Dividend Equivalent rights.

A-1

(c)    Dividend Equivalent rights shall remain outstanding from the Grant Date (or later date of grant of such Dividend Equivalent right in connection with the Company’s payment of a dividend) through the earlier to occur of (i) the termination or forfeiture for any reason of the RSU to which such Dividend Equivalent right corresponds, or (ii) the delivery to the Participant of payment for the RSU (in accordance with Section 6 below) to which such Dividend Equivalent right corresponds. For the avoidance of doubt, if a Dividend Equivalent right terminates after the applicable Stock record date for a Company dividend (other than due to the termination or forfeiture of the RSU to which such Dividend Equivalent right corresponds) and prior to the corresponding payment date thereof, the Participant shall still be entitled to payment of the Dividend Equivalent right amount determined in accordance with this Section 3, if and when the Company pays the underlying dividend; provided, however, that, unless otherwise provided by the Committee, such Dividend Equivalent right amount shall be made in cash (rather than RSUs to be paid in Stock).

(d)    Dividend Equivalent rights and any amounts that may become distributable in respect thereof shall be treated separately from the RSUs and the rights arising in connection therewith for purposes of the designation of time and form of payments required by Code Section 409A.

4.    Vesting. The RSUs shall vest in accordance with the vesting schedule provided in the Grant Notice. The date on which any RSUs vest pursuant to the terms of this Agreement is referred to herein as the “Vesting Date” of such RSUs.

5.    Termination of Employment or Service.

(a)    General. Except as described below in connection with certain terminations of the Participant’s employment or services, the Participant must continue to provide services as an Employee, Consultant or member of the Board through the applicable Vesting Date in order to vest in the applicable installment of Time-Vest RSUs and Eligible Performance-Vest RSUs. Upon the Participant’s termination as an Employee, Consultant or member of the Board, as applicable, all RSUs that have not vested as of such termination (taking into consideration any vesting that may occur in connection with such termination as provided in this Section 5) shall automatically be forfeited and canceled without payment of consideration therefor.

(b)    Qualifying Termination. The rules set forth below in this Section 5(b) shall apply in the event of a Qualifying Termination. A “Qualifying Termination” means that [(1) the Participant’s employment by the Company is terminated by the Company without Cause [(as such term is defined in the Participant’s employment agreement with the Company (the “Employment Agreement”)] or by the Participant with Good Reason [(as defined in the Employment Agreement)], in either event, on or after [____________, ___], (2)] while employed by the Company, the Participant dies or becomes “disabled” (within the meaning of Code Section 409A), [or (3) in the event of the Participant’s Retirement (as defined in the Employment Agreement)].

Subject to the release requirement set forth below, in the event of the Participant’s Qualifying Termination:

• The unvested Time-Vest RSUs that are outstanding immediately prior to such Qualifying Termination shall fully vest and become nonforfeitable immediately prior to such Qualifying Termination, and, as to the time-based vesting requirements applicable to the unvested Performance-Vest RSUs that are outstanding immediately prior to such Qualifying Termination, such time-based vesting requirements shall be considered fully satisfied immediately prior to such Qualifying Termination.

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• In the event of a Qualifying Termination before [December 31, 2017] and prior to a 409A Change in Control Event, the performance period applicable to the Performance-Vest RSUs shall end in connection with such Qualifying Termination and the number of Eligible Performance-Vest RSUs shall be determined in accordance with Appendix B hereto, as modified by this paragraph. If the Qualifying Termination occurs on or before [June 30, 2015], the applicable percentage based on the Company’s FFO Per Share performance shall be deemed to be 100%. If the Qualifying Termination occurs after [June 30, 2015], and before [December 31, 2015], the FFO Per Share measurement/target levels set forth in Appendix B shall be pro-rated for a short performance period ending with the quarter prior to the quarter in which the Qualifying Termination occurs, and the applicable percentage based on the Company’s FFO Per Share performance shall be determined based on the Company’s actual FFO Per Share for that short performance period against such pro-rated measurement/target levels. In addition, the applicable percentage determined based on the Company’s TSR Percentile Ranking shall be based on each year of the three (3)-year period relevant for such determinations that is completed prior to the date of the Qualifying Termination, and the short year in which the Qualifying Termination occurs (with the applicable Ending Prices determined as of the date of the Qualifying Termination for purposes of determining TSRs and the TSR Percentile for such short year). For purposes of clarity, if a Qualifying Termination occurred on [June 30, 2015], for example, there would be no completed year of the three (3)-year period and the TSR Percentile Ranking would be determined solely with respect to the short period of approximately six (6) months ending with the date of the Qualifying Termination.

• The benefits provided by the preceding two paragraphs are subject to the condition that the Participant (or, in the event of the Participant’s death or disability, the Participant’s estate or personal representative, as the case may be) provide the Company with, and the Participant (or his estate or personal representative, as the case may be) does not revoke, a general release [in substantially the form attached to the Participant’s Employment Agreement (or, if no such form is attached to the Employment Agreement,] in a form prescribed by the Company). Such general release shall be provided to the Participant (or his estate or personal representative, as the case may be) within five (5) days of the Qualifying Termination date and the Participant (or his estate or personal representative, as the case may be) shall execute and deliver to the Company the general release within thirty (30) days after the Company provides the release to the Participant (or forty-five (45) days if such longer period of time is required to make the release maximally enforceable under applicable law). In the event this paragraph applies and the general release (and the expiration of any revocation rights provided therein or pursuant to applicable law) could become effective in one of two taxable years depending on when the Participant (or his estate or personal representative, as the case may be) executes and delivers the release, any payment conditioned on the release shall not be made earlier than the first business day of the later of such two tax years. For purposes of this Agreement, “business day” means a calendar day other than a Saturday, Sunday or Federal holiday.

[(c)    Employment Agreement. The Time-Vest RSUs shall be subject to any accelerated vesting protections afforded to the Participant in his Employment Agreement, in addition to the protections set forth above in this Grant Notice. The Performance-Vest RSUs, however, shall be subject to the termination of employment rules set forth in Section 5(b) above and not any severance, accelerated vesting, or similar provisions of any Employment Agreement. As to the Performance-Vest RSUs, any provision of an Employment Agreement giving the Participant “better of” (or similar) treatment (e.g., the better of the severance protections afforded in the Employment Agreement or the applicable award agreement) shall not apply. To the extent the Participant’s Employment Agreement includes, as a component of any severance that may be payable to the Participant pursuant to the Employment Agreement, a measure based on “Annual Incentives” or similar measure that includes the value of equity awards granted during a prescribed period of time, in determining such Annual Incentives (or similar) for the Participant, the grant date fair value of the RSUs (as determined by the Company as of the Grant Date based on its customary accounting principles, and assuming that the RSUs were accounted for under FASB ASC Topic 718) shall be taken into account (to the extent that the value of equity awards granted during the year in which the Grant Date occurs are relevant such purposes), and in no event shall the actual payment of the RSUs be taken into account for purposes of any determination of such Annual Incentives (or similar).

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The provisions of this paragraph control in the event of any inconsistency with an Employment Agreement and notwithstanding anything in an Employment Agreement to the contrary. Each Employment Agreement is deemed amended to the extent (if any) necessary to give effect to this paragraph. The Participant specifically agrees with this paragraph and agrees that the grant of the RSUs satisfies the Company’s equity award grant obligations to the Participant through [2015].]

[(c)    For purposes of this Agreement, “Cause” shall mean “cause” as defined in an applicable employment agreement between the Company and the Participant or, if no such employment agreement exists or such employment agreement does not contain a definition of “cause,” then Cause shall mean: (i) the Participant’s conviction for commission of a felony or a crime involving moral turpitude; (ii) the Participant’s willful commission of any act of theft, embezzlement or misappropriation against the Company; or (iii) the Participant’s willful and continued failure to substantially perform the Participant’s duties as an Employee, Consultant or member of the Board of the Company (other than such failure resulting from the Participant’s incapacity due to physical or mental illness), which failure is not remedied within a reasonable time after written demand for substantial performance is delivered by the Company which specifically identifies the manner in which the Company believes that the Participant has not substantially performed the Participant’s duties.

(d)    For purposes of this Agreement, “Good Reason” shall mean “good reason” as defined in an applicable employment agreement between the Company and the Participant or, if no such employment agreement exists or such employment agreement does not contain a definition of “good reason,” then Good Reason shall mean: (i) the Company’s material breach of any of its obligations under any written, applicable employment agreement between the Company and the Participant, if any, or (ii) any material diminution in the Participant’s authority, duties or responsibilities as an Employee, Consultant or member of the Board of the Company without the Participant’s prior written consent. Notwithstanding the foregoing, the Participant will not be deemed to have resigned for Good Reason unless (A) the Participant provides the Company with written notice setting forth in reasonable detail the facts and circumstances claimed by the Participant to constitute Good Reason within ninety (90) days after the date of the occurrence of any event that the Participant knows to constitute Good Reason, (B) the Company fails to cure such acts or omissions within thirty (30) days following its receipt of such notice, and (C) the effective date of the Participant’s termination for Good Reason occurs no later than ninety (90) days after the expiration of the Company’s cure period.]

6.    Distribution.

(a)    Distribution Date. Subject to Sections 6(d) and 10 below, payment with respect to RSUs issued under this Agreement (including any RSUs issued in respect of Dividend Equivalent rights) shall, to the extent vested, be paid to the Participant on or within sixty (60) days following the earliest to occur of (i) the date of the Participant’s “separation from service” within the meaning of Code Section 409A (a “Separation from Service”); (ii) the date of the occurrence of a 409A Change in Control Event (as defined in Appendix B); (iii) the date of the Participant’s death or “disability” (within the meaning of Code Section 409A); and (iv) the time-based vesting date applicable to such RSUs pursuant to Section 4 (as to Time-Vest RSUs) or [December 31, 2017] (as to Performance-Vest RSUs) (any such date, a “Distribution Date”); provided, however, that if the Participant has elected to defer payment of the RSUs on the Participant’s Deferral Election Form (as indicated in the Grant Notice), the Participant’s deferred distribution election as set forth in the Deferral Election Form shall be given effect and the payment date elected by the Participant pursuant to such Deferral Election Form shall be the “Distribution Date” of the RSUs.

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(b)    Distribution Payments. All distributions upon payment of the RSUs shall be made by the Company in the form of whole shares of Stock, and to the extent that any fractional RSUs become payable on a Distribution Date, such fractional RSUs shall be paid in cash (unless otherwise determined under Section 15.10 of the Plan). To the extent that any outstanding RSUs remain unvested as of an applicable Distribution Date (after taking into consideration any vesting which may occur in connection with the occurrence of such Distribution Date), then such RSUs shall, to the extent not forfeited in connection with such distribution, be paid as Restricted Stock, and the vesting schedule that applied to such RSUs immediately prior to such distribution shall continue to apply to such Restricted Stock; provided, however, that to the extent any such distributions are payable in cash in accordance with this Section 6(b), such cash amounts (determined as of the Distribution Date) shall instead be paid to the Participant on or within sixty (60) days after the date(s) on which the shares of Restricted Stock to which such cash payments relate would have vested in accordance with this Section 6(b) (and such cash payments shall be forfeitable on the same terms that would otherwise apply to such Restricted Stock).

(c)    Unforeseeable Emergency. If the Participant experiences an “unforeseeable emergency” within the meaning of Code Section 409A (an “Unforeseeable Emergency”), the Committee may, in its sole discretion, permit an early distribution of that portion of the Participant’s vested RSUs reasonably necessary to satisfy the emergency need giving rise to the Unforeseeable Emergency, including any taxes or penalties reasonably anticipated to result from such distribution and taking into consideration any funds that may become available as a result of the termination of any applicable deferral election in connection with such distribution.

(d)    Distributions Following Separations from Service. Notwithstanding anything herein to the contrary, no distribution hereunder shall be made to the Participant during the six (6)-month period following the Participant’s Separation from Service to the extent that the Company determines that paying such amounts at the time set forth in this Section 6 would be a prohibited distribution under Code Section 409A(a)(2)(B)(i). If the payment of any such amounts is delayed as a result of the previous sentence, then on the first business day following the end of such six (6)-month period (or such earlier date upon which such amount can be paid under Code Section 409A without resulting in a prohibited distribution, including as a result of the Participant’s death), the Company shall pay the Participant the cumulative amounts that would have otherwise been payable to the Participant during such period.

(e)    Distribution Timing. The time of distribution of the RSUs under this Agreement may not be changed except as may be permitted by the Committee in accordance with the Plan and Code Section 409A and the applicable Treasury Regulations promulgated thereunder. For purposes of clarity, no provision of the Plan (including, without limitation, Section 11.2 thereof) shall alter the time of distribution of the RSUs under this Agreement, except as the Committee may provide consistent with the preceding sentence.

7.    Tax Withholding. The Company shall have the authority and the right to deduct, withhold or require the Participant or beneficiary to remit to the Company an amount sufficient to satisfy federal, state, local and foreign taxes (including without limitation any income and employment tax obligations) required by law to be withheld with respect to any taxable event arising in connection with the RSUs and/or the Dividend Equivalent rights. To the extent that such obligations arise at the time that the RSUs are distributed to the Participant in shares of Stock, the Company may, in its sole discretion and in satisfaction of the foregoing requirement, require the Participant to deliver shares of Stock otherwise issuable under this Agreement (or allow the return of shares of Stock) having a Fair Market Value equal to the sums required to be withheld, provided, that the number of shares of Stock which may be so withheld (or returned) with respect to a taxable event arising in connection with the RSUs and/or the Dividend Equivalent rights shall be limited to the number of shares which have a Fair Market Value on the date of withholding equal to the aggregate amount of such liabilities based on the minimum statutory withholding rates for federal, state and local income tax and payroll tax purposes that are applicable to such supplemental taxable income.

8.    Rights as Stockholder. Neither the Participant nor any person claiming under or through the Participant will have any of the rights or privileges of a stockholder of the Company in respect of any shares of Stock deliverable hereunder unless and until certificates representing such shares of Stock will have been issued, recorded on the records of the Company or its transfer agents or registrars, and delivered to the Participant or any person claiming under or through the Participant.

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9.    Non-Transferability. Neither the RSUs or Dividend Equivalent rights nor any interest or right therein or part thereof shall be transferred, assigned, pledged or hypothecated by the Participant in any way in favor of any party other than the Company or a Subsidiary (whether by operation of law or otherwise) and shall not be subjected to any lien, obligation or liability of the Participant to any party other than the Company or a Subsidiary, other than by the laws of descent and distribution. Upon any attempt by the Participant to transfer, assign, pledge, hypothecate or otherwise dispose of this grant, or any right or privilege conferred hereby, or upon any attempted sale by the Participant under any execution, attachment or similar process, this grant and the rights and privileges conferred hereby shall immediately become null and void. Notwithstanding the foregoing, the Company may assign any of its rights under this Agreement to single or multiple assignees and this Agreement shall inure to the benefit of the successors and assigns of the Company.

10.    Distribution of Stock. In the event shares of Stock are paid to the Participant in accordance herewith, the Company shall not be required to record any shares of Stock in the name of the Participant in the books and records of the Company’s transfer agent, and the Company shall not be required to issue or deliver any certificate or certificates for any shares of Stock prior to the fulfillment of all of the following conditions: (a) the admission of such shares to listing on all stock exchanges on which the Company’s common stock is then listed, (b) the completion of any registration or other qualification of such shares under any state or federal law or under rulings or regulations of the Securities and Exchange Commission or other governmental regulatory body, which the Company shall, in its sole and absolute discretion, deem necessary and advisable, (c) the obtaining of any approval or other clearance from any state or federal governmental agency that the Company shall, in its absolute discretion, determine to be necessary or advisable, and (d) the lapse of any such reasonable period of time following the Distribution Date as the Company may from time to time establish for reasons of administrative convenience. In the event that the Company delays a distribution or payment in settlement of RSUs because it determines that the issuance of shares of Stock in settlement of such RSUs will violate federal securities laws or other applicable law, such distribution or payment shall be made at the earliest date at which the Company reasonably determines that the making of such distribution or payment will not cause such violation, as required by Treasury Regulation Section 1.409A-2(b)(7)(ii). No payment shall be delayed under this Section 10 if such delay will result in a violation of Code Section 409A.

11.    No Right to Continued Service. Nothing in the Plan or in this Agreement shall confer upon the Participant any right to continue as an Employee, Consultant, member of the Board, or other service provider of the Company or any Subsidiary, or shall interfere with or restrict in any way the rights of the Company or any Subsidiary, which are hereby expressly reserved, to discharge the Participant at any time for any reason whatsoever, with or without Cause, except to the extent expressly provided otherwise in a written agreement between the Participant and the Company or any Subsidiary.

12.    Severability. In the event that any provision in this Agreement is held invalid or unenforceable, such provision will be severable from, and such invalidity or unenforceability will not be construed to have any effect on, the remaining provisions of this Agreement, which shall remain in full force and effect.

13.    Tax Consultation. The Participant understands that he or she may suffer adverse tax consequences in connection with the RSUs and Dividend Equivalent rights granted pursuant to this Agreement. The Participant represents that the Participant has consulted with any tax consultants that he or she deems advisable in connection with the RSUs and the Dividend Equivalent rights and that the Participant is not relying on the Company for tax advice.

14.    Amendment. Subject to Sections 16 and 18 below, this Agreement may only be amended, modified or terminated by a writing executed by the Participant and by a duly authorized representative of the Company.

15.    Relationship to other Benefits. Neither the RSUs, the Dividend Equivalent rights, nor payment in respect of the foregoing shall be taken into account in determining any benefits pursuant to any pension, retirement, savings, profit sharing, group insurance, welfare or other benefit plan of the Company or any Subsidiary.

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16.    Code Section 409A. To the extent that the Company determines that any RSUs and/or Dividend Equivalent rights may not be compliant with or exempt from Code Section 409A, the Company may amend this Agreement in a manner intended to comply with the requirements of Code Section 409A or an exemption therefrom (including amendments with retroactive effect), or take any other actions as it deems necessary or appropriate to (a) comply with the requirements of Code Section 409A and/or (b) exempt the RSUs and/or the Dividend Equivalent rights from Code Section 409A and/or preserve the intended tax treatment of the benefits provided with respect to the RSUs. To the extent applicable, this Agreement shall be interpreted in accordance with the provisions of Code Section 409A.

17.    Clawback. The Participant agrees that all compensation paid or payable to the Participant pursuant to this Agreement shall be subject to (a) the provisions of any claw-back policy implemented by the Company to comply with applicable law or regulation (including stock exchange rules), including, without limitation, any claw-back policy adopted to comply with the requirements of the Dodd-Frank Wall Street Reform and Consumer Protection Act and any rules or regulations promulgated thereunder, and (b) any other claw-back required by applicable law.

18.    Conformity to Securities Laws. The Participant acknowledges that the Plan and this Agreement are intended to conform to the extent necessary with all provisions of the Securities Act and the Exchange Act, and any and all regulations and rules promulgated by the Securities and Exchange Commission thereunder, as well as all applicable state securities laws and regulations. Notwithstanding anything herein to the contrary, the Plan shall be administered, and the RSUs are granted, only in such a manner as to conform to such laws, rules and regulations. To the extent permitted by applicable law, the Plan and this Agreement shall be deemed amended to the extent necessary to conform to such laws, rules and regulations.

19.    Notices. Any notice to be given under the terms of this Agreement to the Company shall be addressed to the Company in care of the Secretary of the Company at the Company’s principal office, and any notice to be given to the Participant shall be addressed to the Participant at the Participant’s last address (physical or electronic) reflected on the Company’s records. Any notice shall be deemed duly given when sent by reputable overnight courier or by certified mail (return receipt requested) through the United States Postal Service.

20.    Entire Agreement. The Plan and this Agreement (including all exhibits and appendices hereto) constitute the entire agreement of the parties and supersede in their entirety all prior undertakings and agreements of the Company and the Participant with respect to the subject matter hereof.

21    Governing Law. The laws of the State of Maryland shall govern the interpretation, validity, administration, enforcement and performance of the terms of this Agreement regardless of the law that might be applied under principles of conflicts of laws.

22.    Captions. Captions provided herein are for convenience only and are not to serve as a basis for interpretation or construction of this Agreement.

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APPENDIX B

PERFORMANCE VESTING REQUIREMENTS

The percentage of the Performance-Vest RSUs (if any) that will be eligible to vest on the applicable Vesting Date as set forth in this Agreement (i.e., the number of “Eligible Performance-Vest RSUs”) will be determined as follows:

(1) the number of Performance-Vest RSUs (as set forth in or determined under the Grant Notice) will be multiplied by the applicable percentage determined in accordance with the following table based on the Company’s FFO Per Share for [2015]:

If the Company’s FFO Per Share for [2015] is:	The applicable percentage is:
$[___] or greater	[___]%
$[___]	[___]%
$[___]	[___]%
Less than $[___]	0% (Zero)

For FFO Per Share amounts between the levels indicated, the applicable percentage will be determined on a pro-rata basis between points.

(2) the number of RSUs determined as provided in clause (1) above will be multiplied by the applicable percentage determined in accordance with the following table based on the Company’s TSR Percentile Ranking (for the period [2015-2017]):

If the Company’s TSR Percentile Ranking is:	The applicable percentage is:
The [__]th percentile or greater.	[___]%
The [__]th percentile or greater, but equal to or less than the [__]th percentile.	100% (no modification)
The [__]th percentile or lower.	[___]%

For a TSR Percentile Ranking between the levels indicated, the applicable percentage will be determined on a pro-rata basis between points.

(3) the number of RSUs determined as provided in clause (2) above will be rounded down to the nearest whole RSU.

Determination. During [January or February of 2018] (or such earlier time as provided in this Agreement in the case of a Participant’s Qualifying Termination or a 409A Change in Control Event), the Committee will determine the number of Eligible Performance-Vest RSUs in accordance with the provisions of this Appendix B and, in the event of any ambiguity or discrepancy, the determination of the Committee shall be final and binding.

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Defined Terms. For purposes of this Appendix B, the following definitions shall apply:

“FFO Per Share” shall mean the Company’s funds from operations, determined in accordance with the White Paper on funds from operations approved by the Board of Governors of the National Association of Real Estate Investment Trusts, adjusted as provided below, divided by the weighted average common shares of the Company outstanding for [2015], calculated on a diluted basis, including participating share-based awards (i.e. nonvested stock and time-based restricted stock units), the dilutive impact of stock options and contingently issuable shares and assuming the exchange of all common limited partnership units outstanding. Funds from operations shall be equitably and proportionately adjusted to include or exclude, as applicable, the following:

• exclude expenses associated with variable accounting for equity-based awards to the extent that such expenses exceed the expense that would have been produced had such awards originally been granted as equity awards accounted for under FASB ASC Topic 718;

• exclude unbudgeted compensation expenses;

• exclude non-cash charges;

• exclude acquisition-related expenses;

• include revenue that would have been included in earnings but is not recognized due to tenant delays;

• exclude the impact of mergers and similar corporate transactions; and

• exclude the impact of similar extraordinary items not contemplated by the Committee on the Grant Date.

“TSR Percentile” will be determined for each of [2015, 2016, and 2017], and, for each such year, means the percentile ranking of the Company’s TSR for such year among the TSRs for the Comparison Group members for such year.

“TSR Percentile Ranking” means the average of the TSR Percentile determined for [2015], the TSR Percentile determined for [2016], and the TSR Percentile determined for [2017].

“Comparison Group” means, with respect to a particular year, the Company and each other company included in the SNL US REIT Office Index on the Grant Date that remains included in such Index (or a successor index, in the event that the SNL US REIT Office Index ceases to exist) through the last day of that year.

“TSR” means total shareholder return and shall be determined with respect to the Company and any other Comparison Group member for a particular year by dividing: (a) the sum of (i) the difference obtained by subtracting the applicable Beginning Price for such year from the applicable Ending Price for such year plus (ii) all dividends and other distributions during the applicable year by (b) the applicable Beginning Price for such year. Any non-cash distributions shall be valued at fair market value. For purposes of determining TSR, the value of dividends and other distributions shall be determined by treating them as reinvested in additional shares of stock at the closing market price on the date of distribution.

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“Beginning Price” means, with respect to the Company and any other Comparison Group member for a particular year, the average of the closing market prices of such company’s common stock on the principal exchange on which such stock is traded for the twenty (20) consecutive trading days ending with the last trading day immediately prior to such year. As to a stock which goes ex-dividend during such twenty (20)-trading day period, the closing market prices as to such stock for the portion of such period preceding the ex-dividend date shall be equitably and proportionately adjusted to exclude the amount of the related dividend.

“Ending Price” means, with respect to the Company and any other Comparison Group member for a particular year, the average of the closing market prices of such company’s common stock on the principal exchange on which such stock is traded for the twenty (20) consecutive trading days ending with the last trading day of such year. As to a stock which goes ex-dividend during such twenty (20)-trading day period, the closing market prices as to such stock for the portion of such period preceding the ex-dividend date shall be equitably and proportionately adjusted to exclude the amount of the related dividend.

With respect to the computation of TSR, Beginning Price, and Ending Price, there shall also be an equitable and proportionate adjustment to the extent (if any) necessary to preserve the intended incentives of the awards and mitigate the impact of any stock split, stock dividend or reverse stock split occurring during the applicable year. In determining the Company’s TSR Percentile for a particular year, in the event that the Company’s TSR for that year is equal to the TSR(s) of one or more other Comparison Group members for that same period, the Company’s TSR will be deemed to be greater than the TSR of such other Comparison Group member(s) for that year.

Change of Control. For purposes of this Agreement, “409A Change in Control Event” means a “change in the ownership or effective control” of the Company or a “change in the ownership of a substantial portion of the assets” of the Company, in each case within the meaning of Code Section 409A. If a 409A Change in Control Event occurs before [December 31, 2017], the performance period applicable to the Performance-Vest RSUs shall end in connection with such 409A Change in Control Event and the foregoing provisions of this Appendix B shall be applied as modified by this paragraph. For purposes of clarity, the Performance-Vest RSUs shall continue to be subject to the applicable time-based vesting requirement, and the severance protections afforded the Participant in this Agreement shall continue to apply. If the 409A Change in Control Event occurs on or before [March 31, 2015], the applicable percentage based on the Company’s FFO Per Share performance shall be deemed to be 100%. If the 409A Change in Control Event occurs after [March 31, 2015], and before [December 31, 2015], the FFO Per Share measurement/target levels set forth above in this Appendix B shall be pro-rated for a short performance period ending with the quarter prior to the quarter in which the 409A Change in Control Event occurs, and the applicable percentage based on the Company’s FFO Per Share performance shall be the greater of (1) the applicable percentage determined based on the Company’s actual FFO Per Share for that short performance period against such pro-rated measurement/target levels, and (2) 100%. In addition, the applicable percentage determined based on the Company’s TSR Percentile Ranking shall be based on each year of the three (3)-year period relevant for such determinations that is completed prior to the date of the 409A Change in Control Event, and the short year in which the 409A Change in Control Event occurs (with the applicable Ending Prices determined as of the date of the 409A Change in Control Event for purposes of determining TSRs and the TSR Percentile for such short year, and the Ending Price of the Company’s common stock for purposes of such determination shall be the last closing market price for a share of the Company’s common stock on the principal exchange on which such stock is traded immediately prior to such event (for clarity, a twenty (20)-day average will not be used to determine the Ending Price of the Company’s common stock in such circumstances)).

* * * * *

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EX-10.2

Exhibit 10.2

KILROY REALTY CORPORATION
2006 INCENTIVE AWARD PLAN

RESTRICTED STOCK UNIT AGREEMENT

GRANT NOTICE

Kilroy Realty Corporation (the “Company”) has granted to the Participant named below an award of Restricted Stock Units (“RSUs”). The terms and conditions of the award are set forth in this Grant Notice (the “Grant Notice”), and Appendix A attached hereto and incorporated herein by this reference (collectively, this “Agreement”).

Participant: [_______] (the “Participant”)

Grant Date: [_______] (the “Grant Date”)

Total Number of RSUs: [_____]    

Vesting Dates: [The RSUs shall vest in three (3) substantially equal installments (rounded down to the nearest whole RSU until the last installment) on each of [January 5, 2016], [January 5, 2017] and [January 5, 2018].]

The RSUs are subject to accelerated vesting in connection with certain changes in control of the Company or certain terminations of the Participant’s employment as and to the extent provided herein.

[Deferral Election: Participant elected [not to defer any distribution of the RSUs] [a deferred distribution of the RSUs but with no fixed-date election] [a deferred distribution of the RSUs with a fixed-date election of ____________, ___] pursuant to Participant’s 2015 Restricted Stock Unit Deferral Election Form dated December __, 2014 (the “Deferral Election Form”).]

The award is granted under and is further subject to the terms and conditions of the Company’s 2006 Incentive Award Plan (as amended from time to time, the “Plan”), incorporated herein by this reference. The Participant acknowledges having received and read, and understands, the Plan and this Agreement. The Participant agrees to the terms and conditions of the award as set forth in this Agreement. If the Participant is married, his or her spouse must also sign the Consent of Spouse set forth below.

[Signature Page Follows]

KILROY REALTY CORPORATION, a Maryland corporation ________________________________ Name: __________________________ Title: ___________________________	PARTICIPANT: ____________________________________ Printed Name: ________________________
KILROY REALTY CORPORATION, a Maryland corporation ________________________________ Name: __________________________ Title: ___________________________

CONSENT OF SPOUSE

I, ____________________, spouse of ____________________, have read and approve this Agreement. In consideration of issuing to my spouse the Restricted Stock Units and Dividend Equivalent rights set forth in this Agreement, I hereby appoint my spouse as my attorney-in-fact in respect to the exercise of any rights under this Agreement and agree to be bound by the provisions of the Agreement insofar as I may have any rights in said Agreement and any Restricted Stock Units, Dividend Equivalent rights, shares of Kilroy Realty Corporation or cash issued pursuant thereto under the community property laws or similar laws relating to marital property in effect in the state of our residence as of the date of the signing of this Agreement.

Dated: _______________, _____            ________________________________

Signature of Spouse

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APPENDIX A

TERMS AND CONDITIONS OF

RESTRICTED STOCK UNITS AND DIVIDEND EQUIVALENT RIGHTS

1.    Grant.The effective date of the award is the Grant Date. The total number of RSUs subject to the award is the total number of RSUs set forth in the Grant Notice. Except as otherwise expressly provided herein, all capitalized terms used in this Agreement and not otherwise defined shall have the meanings provided in the Plan.

2.    RSUs.Each RSU that vests in accordance with this Agreement shall represent the right to receive, as determined by the Committee in accordance with Section 6 below, either (i) a payment of one share of Stock or (ii) a payment in cash equal to the Fair Market Value of one share of Stock on the applicable Distribution Date (as defined below). Prior to actual payment in respect of any vested RSU, such RSU will represent an unsecured obligation of the Company, payable (if at all) only from the general assets of the Company.

3.    Dividend Equivalent Rights.

(a)    Each RSU granted hereunder is hereby granted in tandem with a corresponding Dividend Equivalent right. Such Dividend Equivalent right shall entitle the Participant to have a hypothetical bookkeeping account (established and maintained for purposes of tracking the RSUs and any additional RSUs credited to such account in respect of Dividend Equivalent rights in accordance with thisSection 3) (the “Account”) that is credited upon the Company’s payment of dividends to stockholders of outstanding shares of Stock if the Dividend Equivalent right is or was outstanding on the applicable Stock record date. Subject toSection 3(c)below, when suchdividends are so declared, the following shall occur:

(i) on the date that the Company pays a cash dividend in respect of outstanding shares of Stock, the Company shall credit the Participant’s Account with a number of full and fractional RSUs equal to the quotient of (A) the total number of RSUs credited to the Account but not yet distributed (including any RSUs granted hereunder and any additional RSUs credited with respect to Dividend Equivalent rights), multiplied by the per share dollar amount of such dividend, divided by (B) the Fair Market Value of a share of Stock on the date such dividend is paid,

(ii) on the date that the Company pays a Stock dividend in respect of outstanding shares of Stock, the Company shall credit the Participant’s Account with a number of full and fractional RSUs equal to the product of (A) the total number of RSUs credited to the Account but not yet distributed (including any RSUs granted hereunder and any additional RSUs credited with respect to Dividend Equivalent rights), multiplied by (B) the number of shares of Stock distributed with respect to such dividend per share of Stock, or

(iii) on the date that the Company pays any other type of distribution in respect of outstanding shares of Stock, the Company shall credit the Participant’s Account in an equitable manner based on the total number of RSUs held in the Account, as determined in the sole discretion of the Committee.

(b)    To the extent that any additional RSUs are credited to the Participant’s Account in respect of the Participant’s Dividend Equivalent rights, such additional RSUs shall be subject to the same vesting terms as the original RSUs to which they relate and shall also carry corresponding Dividend Equivalent rights.

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(c)    Dividend Equivalent rights shall remain outstanding from the Grant Date (or later date of grant of such Dividend Equivalent right in connection with the Company’s payment of a dividend) through the earlier to occur of (i) the termination or forfeiture for any reason of the RSU to which such Dividend Equivalent right corresponds, or (ii) the delivery to the Participant of payment for the RSU (in accordance with Section 6 below) to which such Dividend Equivalent right corresponds. For the avoidance of doubt, if a Dividend Equivalent right terminates after the applicable Stock record date for a Company dividend (other than due to the termination or forfeiture of the RSU to which such Dividend Equivalent right corresponds) and prior to the corresponding payment date thereof, the Participant shall still be entitled to payment of the Dividend Equivalent right amount determined in accordance with this Section 3, if and when the Company pays the underlying dividend; provided, however, that, unless otherwise provided by the Committee, such Dividend Equivalent right amount shall be made in cash (rather than RSUs to be paid in Stock).

(d)    Dividend Equivalent rights and any amounts that may become distributable in respect thereof shall be treated separately from the RSUs and the rights arising in connection therewith for purposes of the designation of time and form of payments required by Code Section 409A.

4.    Vesting.The RSUs shall vest in accordance with the vesting schedule provided in the Grant Notice. The date on which any RSUs vest pursuant to the terms of this Agreement is referred to herein as the “Vesting Date” of such RSUs.

5.    Termination of Employment or Service.

(a)    General. Except as described below in connection with certain terminations of the Participant’s employment or services, the Participant must continue to provide services as an Employee, Consultant or member of the Board through the applicable Vesting Date in order to vest in the applicable installment of RSUs. Upon the Participant’s termination as an Employee, Consultant or member of the Board, as applicable, all RSUs that have not vested as of such termination (taking into consideration any vesting that may occur in connection with such termination as provided in this Section 5) shall automatically be forfeited and canceled without payment of consideration therefor.

(b)    Qualifying Termination. A “Qualifying Termination” means that [(1) the Participant's employment by the Company terminated by the Company without Cause or by the Participant with Good Reason, in either event, on or after [____________, ___] or (2)] while employed by the Company, the Participant dies or becomes “disabled” (within the meaning of Code Section 409A). Subject to the release requirement set forth below, in the event of the Participant’s Qualifying Termination, the unvested RSUs that are outstanding immediately prior to such Qualifying Termination shall fully vest and become nonforfeitable immediately prior to such Qualifying Termination. The benefits provided by this Section 5(b) are subject to the condition that the Participant (or, in the event of the Participant’s death or disability, the Participant’s estate or personal representative, as the case may be) provide the Company with, and the Participant (or his estate or personal representative, as the case may be) does not revoke, a general release in a form prescribed by the Company. Such general release shall be provided to the Participant (or his estate or personal representative, as the case may be) within five (5) days of the Qualifying Termination date and the Participant (or his estate or personal representative, as the case may be) shall execute and deliver to the Company the general release within thirty (30) days after the Company provides the release to the Participant (or forty-five (45) days if such longer period of time is required to make the release maximally enforceable under applicable law). In the event this paragraph applies and the general release (and the expiration of any revocation rights provided therein or pursuant to applicable law) could become effective in one of two taxable years depending on when the Participant (or his estate or personal representative, as the case may be) executes and delivers the release, any payment conditioned on the release shall not be made earlier than the first business day of the later of such two tax years. For purposes of this Agreement, “business day” means a calendar day other than a Saturday, Sunday or Federal holiday.

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[(c)    For purposes of this Agreement, “Cause” shall mean “cause” as defined in an applicable employment agreement between the Company and the Participant or, if no such employment agreement exists or such employment agreement does not contain a definition of “cause,” then Cause shall mean: (i) the Participant’s conviction for commission of a felony or a crime involving moral turpitude; (ii) the Participant’s willful commission of any act of theft, embezzlement or misappropriation against the Company; or (iii) the Participant’s willful and continued failure to substantially perform the Participant’s duties as an Employee, Consultant or member of the Board of the Company (other than such failure resulting from the Participant’s incapacity due to physical or mental illness), which failure is not remedied within a reasonable time after written demand for substantial performance is delivered by the Company which specifically identifies the manner in which the Company believes that the Participant has not substantially performed the Participant’s duties.]

[(d)    For purposes of this Agreement, “Good Reason” shall mean “good reason” as defined in an applicable employment agreement between the Company and the Participant or, if no such employment agreement exists or such employment agreement does not contain a definition of “good reason,” then Good Reason shall mean: (i) the Company’s material breach of any of its obligations under any written, applicable employment agreement between the Company and the Participant, if any, or (ii) any material diminution in the Participant’s authority, duties or responsibilities as an Employee, Consultant or member of the Board of the Company without the Participant’s prior written consent. Notwithstanding the foregoing, the Participant will not be deemed to have resigned for Good Reason unless (A) the Participant provides the Company with written notice setting forth in reasonable detail the facts and circumstances claimed by the Participant to constitute Good Reason within ninety (90) days after the date of the occurrence of any event that the Participant knows to constitute Good Reason, (B) the Company fails to cure such acts or omissions within thirty (30) days following its receipt of such notice, and (C) the effective date of the Participant’s termination for Good Reason occurs no later than ninety (90) days after the expiration of the Company’s cure period.]

6.    Distribution.

(a)    Distribution Date.Subject to Sections 6(d) and 10 below, payment with respect to RSUs issued under this Agreement (including any RSUs issued in respect of Dividend Equivalent rights) shall, to the extent vested, be paid to the Participant on or within sixty (60) days following [the earliest to occur of (i) the date of the Participant’s “separation from service” within the meaning of Code Section 409A (a “Separation from Service”); (ii) the date of the occurrence of a 409A Change in Control Event (as defined below); (iii) the date of the Participant’s death or “disability” (within the meaning of Code Section 409A); and (iv)] the Vesting Date applicable to such RSUs pursuant to Section 4 (any such date, a “Distribution Date”) [; provided, however, that if the Participant has elected to defer payment of the RSUs on the Participant’s Deferral Election Form (as indicated in the Grant Notice), the Participant’s deferred distribution election as set forth in the Deferral Election Form shall be given effect and the payment date elected by the Participant pursuant to such Deferral Election Form shall be the “Distribution Date” of the RSUs].

(b)    Distribution Payments. All distributions upon payment of the RSUs shall be made by the Company in the form of whole shares of Stock, and to the extent that any fractional RSUs become payable on a Distribution Date, such fractional RSUs shall be paid in cash (unless otherwise determined under Section 15.10 of the Plan). [To the extent that any outstanding RSUs remain unvested as of an applicable Distribution Date (after taking into consideration any vesting which may occur in connection with the occurrence of such Distribution Date), then such RSUs shall, to the extent not forfeited in connection with such distribution, be paid as Restricted Stock, and the vesting schedule that applied to such RSUs immediately prior to such distribution shall continue to apply to such Restricted Stock; provided, however, that to the extent any such distributions are payable in cash in accordance with this Section 6(b), such cash amounts (determined as of the Distribution Date) shall instead be paid to the Participant on or within sixty (60) days after the date(s) on which the shares of Restricted Stock to which such cash payments relate would have vested in accordance with this Section 6(b) (and such cash payments shall be forfeitable on the same terms that would otherwise apply to such Restricted Stock).]

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[(c)    Unforeseeable Emergency. If the Participant experiences an “unforeseeable emergency” within the meaning of Code Section 409A (an “Unforeseeable Emergency”), the Committee may, in its sole discretion, permit an early distribution of that portion of the Participant’s vested RSUs reasonably necessary to satisfy the emergency need giving rise to the Unforeseeable Emergency, including any taxes or penalties reasonably anticipated to result from such distribution and taking into consideration any funds that may become available as a result of the termination of any applicable deferral election in connection with such distribution.]

(d)    Distributions Following Separations from Service. Notwithstanding anything herein to the contrary, no distribution hereunder shall be made to the Participant during the six (6)-month period following the Participant’s Separation from Service to the extent that the Company determines that paying such amounts at the time set forth in this Section 6 would be a prohibited distribution under Code Section 409A(a)(2)(B)(i). If the payment of any such amounts is delayed as a result of the previous sentence, then on the first business day following the end of such six (6)-month period (or such earlier date upon which such amount can be paid under Code Section 409A without resulting in a prohibited distribution, including as a result of the Participant’s death), the Company shall pay the Participant the cumulative amounts that would have otherwise been payable to the Participant during such period.

(e)    Distribution Timing. The time of distribution of the RSUs under this Agreement may not be changed except as may be permitted by the Committee in accordance with the Plan and Code Section 409A and the applicable Treasury Regulations promulgated thereunder. For purposes of clarity, no provision of the Plan (including, without limitation, Section 11.2 thereof) shall alter the time of distribution of the RSUs under this Agreement, except as the Committee may provide consistent with the preceding sentence.

[(f)    409A Change in Control Event. For purposes of this Agreement, “409A Change in Control Event” means a “change in the ownership or effective control” of the Company or a “change in the ownership of a substantial portion of the assets” of the Company, in each case within the meaning of Code Section 409A.]

7.    Tax Withholding. The Company shall have the authority and the right to deduct, withhold or require the Participant or beneficiary to remit to the Company an amount sufficient to satisfy federal, state, local and foreign taxes (including without limitation any income and employment tax obligations) required by law to be withheld with respect to any taxable event arising in connection with the RSUs and/or the Dividend Equivalent rights. To the extent that such obligations arise at the time that the RSUs are distributed to the Participant in shares of Stock, the Company may, in its sole discretion and in satisfaction of the foregoing requirement, require the Participant to deliver shares of Stock otherwise issuable under this Agreement (or allow the return of shares of Stock) having a Fair Market Value equal to the sums required to be withheld, provided, that the number of shares of Stock which may be so withheld (or returned) with respect to a taxable event arising in connection with the RSUs and/or the Dividend Equivalent rights shall be limited to the number of shares which have a Fair Market Value on the date of withholding equal to the aggregate amount of such liabilities based on the minimum statutory withholding rates for federal, state and local income tax and payroll tax purposes that areapplicable to such supplemental taxable income.

8.    Rights as Stockholder. Neither the Participant nor any person claiming under or through the Participant will have any of the rights or privileges of a stockholder of the Company in respect of any shares of Stock deliverable hereunder unless and until certificates representing such shares of Stock will have been issued, recorded on therecords of the Company or its transfer agents or registrars, and delivered to the Participant or any person claiming under or through the Participant.

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9.    Non-Transferability. Neither the RSUs or Dividend Equivalent rights nor any interest or right therein or part thereof shall be transferred, assigned, pledged or hypothecated by the Participant in any way in favor of any party other than the Company or a Subsidiary (whether by operation of law or otherwise) and shall not be subjected to any lien, obligation or liability of the Participant to any party other than the Company or a Subsidiary, other than by the laws of descent and distribution. Upon any attempt by the Participant to transfer, assign, pledge, hypothecate or otherwise dispose of this grant, or any right or privilege conferred hereby, or upon any attempted sale by the Participant under any execution, attachment or similar process, this grant and the rights and privileges conferred hereby shall immediately become null and void. Notwithstanding the foregoing, the Company may assign any of its rights under this Agreement to single or multipleassignees and this Agreement shall inure to the benefit of the successors and assigns of the Company.

10.    Distribution of Stock. In the event shares of Stock are paid to the Participant in accordance herewith, the Company shall not be required to record any shares of Stock in the name of the Participant in the books and records of the Company’s transfer agent, and the Company shall not be required to issue or deliver any certificate or certificates for any shares of Stock prior to the fulfillment of all of the following conditions: (a) the admission of such shares to listing on all stock exchanges on which the Company’s common stock is then listed, (b) the completion of any registration or other qualification of such shares under any state or federal law or under rulings or regulations of the Securities and Exchange Commission or other governmental regulatory body, which the Company shall, in its sole and absolute discretion, deem necessary and advisable, (c) the obtaining of any approval or other clearance from any state or federal governmental agency that the Company shall, in its absolute discretion, determine to be necessary or advisable, and (d) the lapse of any such reasonable period of time following the Distribution Date as the Company may from time to time establish for reasons of administrative convenience. In the event that the Company delays a distribution or payment in settlement of RSUs because it determines that the issuance of shares of Stock in settlement of such RSUs will violate federal securities laws or other applicable law, such distribution or payment shall be made at the earliest date at which the Company reasonably determines that the making of such distribution or payment will not cause such violation, as required by Treasury Regulation Section 1.409A-2(b)(7)(ii). No payment shall be delayed under thisSection 10 if such delay will result in a violation of Code Section 409A.

11.    No Right to Continued Service. Nothing in the Plan or in this Agreement shall confer upon the Participant any right to continue as an Employee, Consultant, member of the Board, or other service provider of the Company or any Subsidiary, or shall interfere with or restrict in any way the rights of the Company or any Subsidiary, which are hereby expressly reserved, to discharge the Participant at any time for any reason whatsoever, with or without Cause, except to the extent expressly providedotherwise in a written agreement between the Participant and the Company or any Subsidiary.

12.    Severability. In the event that any provision in this Agreement is held invalid or unenforceable, such provision will be severable from, and such invalidity orunenforceability will not be construed to have any effect on, the remaining provisions of this Agreement, which shall remain in full force and effect.

13.    Tax Consultation. The Participant understands that he or she may suffer adverse tax consequences in connection with the RSUs and Dividend Equivalent rights granted pursuant to this Agreement. The Participant represents that the Participant has consulted with any tax consultants that he or she deems advisable in connection with the RSUsand the Dividend Equivalent rights and that the Participant is not relying on the Company for tax advice.

14.    Amendment. Subject to Sections 16 and 18 below, this Agreement may only be amended, modified or terminated by a writing executed by the Participant and by a duly authorized representative of the Company.

15.    Relationship to other Benefits. Neither the RSUs, the Dividend Equivalent rights, nor payment in respect of the foregoing shall be taken into account in determining any benefits pursuant to anypension, retirement, savings, profit sharing, group insurance, welfare or other benefit plan of the Company or any Subsidiary.

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16.    Code Section 409A. To the extent that the Company determines that any RSUs and/or Dividend Equivalent rights may not be compliant with or exempt from Code Section 409A, the Company may amend this Agreement in a manner intended to comply with the requirements of Code Section 409A or an exemption therefrom (including amendments with retroactive effect), or take any other actions as it deems necessary or appropriate to (a) comply with the requirements of Code Section 409A and/or (b) exempt the RSUs and/or the Dividend Equivalent rights from Code Section 409A and/or preserve the intended tax treatment of the benefits provided with respect to theRSUs. To the extent applicable, this Agreement shall be interpreted in accordance with the provisions of Code Section 409A.

17.    Clawback. The Participant agrees that all compensation paid or payable to the Participant pursuant to this Agreement shall be subject to (a) the provisions of any claw-back policy implemented by the Company to comply with applicable law or regulation (including stock exchange rules), including, without limitation, any claw-back policy adopted to comply with the requirements of the Dodd-Frank Wall Street Reform and Consumer Protection Act and any rules or regulations promulgated thereunder, and (b) any other claw-back required by applicable law.

18.    Conformity to Securities Laws. The Participant acknowledges that the Plan and this Agreement are intended to conform to the extent necessary with all provisions of the Securities Act and the Exchange Act, and any and all regulations and rules promulgated by the Securities and Exchange Commission thereunder, as well as all applicable state securities laws and regulations. Notwithstanding anything herein to the contrary, the Plan shall be administered, and the RSUs are granted, only in such a manner as to conform to such laws, rules and regulations. To the extent permitted by applicable law, the Plan and this Agreement shall be deemed amended to the extent necessary to conform to such laws, rules and regulations.

19.    Notices. Any notice to be given under the terms of this Agreement to the Company shall be addressed to the Company in care of the Secretary of the Company at the Company’s principal office, and any notice to be given to the Participant shall be addressed to the Participant at the Participant’s last address (physical or electronic) reflected on the Company’s records. Any notice shall be deemed duly given when sent by reputable overnight courier or by certified mail (return receipt requested) through the United States Postal Service.

20.    Entire Agreement. The Plan and this Agreement (including this Appendix A) constitute the entire agreement of the parties and supersede in their entirety all prior undertakings and agreements of the Company and the Participant with respect to the subject matter hereof.

21.    Governing Law. The laws of the State of Maryland shall govern the interpretation, validity, administration, enforcement and performance of the terms of this Agreementregardless of the law that might be applied under principles of conflicts of laws.

22.    Captions. Captions provided herein are for convenience only and are not to serve as a basis for interpretation or construction of this Agreement.

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EX-10.3

Exhibit 10.3

KILROY REALTY CORPORATION
2006 INCENTIVE AWARD PLAN

RESTRICTED STOCK UNIT AGREEMENT

GRANT NOTICE

Kilroy Realty Corporation (the “Company”) has granted to the Participant named below an award of Restricted Stock Units (“RSUs”). The terms and conditions of the award are set forth in this Grant Notice (the “Grant Notice”), and Appendix A attached hereto and incorporated herein by this reference (collectively, this “Agreement”).

Participant: [_______] (the “Participant”)

Grant Date: [_______] (the “Grant Date”)

Total Number of RSUs: [_____]    

Vesting Dates: The RSUs shall vest in one (1) installment on the date of the Company’s [2016] Annual Meeting of Stockholders or, if earlier, upon the occurrence of a Change in Control, provided, however, that if the Participant’s employment or service with the Company terminates due to the Participant’s death or “disability” (within the meaning of Code Section 409A), the then-outstanding and unvested RSUs will fully vest upon such termination of employment or service.

Deferral Election: Participant elected [not to defer any distribution of the RSUs] [a deferred distribution of the RSUs but with no fixed-date election] [a deferred distribution of the RSUs with a fixed-date election of ____________, ___] pursuant to Participant’s [2015] Restricted Stock Unit Deferral Election Form dated [December __, 2014] (the “Deferral Election Form”).

The award is granted under and is further subject to the terms and conditions of the Company’s 2006 Incentive Award Plan (as amended from time to time, the “Plan”), incorporated herein by this reference. The Participant acknowledges having received and read, and understands, the Plan and this Agreement. The Participant agrees to the terms and conditions of the award as set forth in this Agreement. If the Participant is married, his or her spouse must also sign the Consent of Spouse set forth below.

[Signature Page Follows]

KILROY REALTY CORPORATION, a Maryland corporation ________________________________ Name: __________________________ Title: ___________________________	PARTICIPANT: ____________________________________ Printed Name: ________________________
KILROY REALTY CORPORATION, a Maryland corporation ________________________________ Name: __________________________ Title: ___________________________

CONSENT OF SPOUSE

I, ____________________, spouse of ____________________, have read and approve this Agreement. In consideration of issuing to my spouse the Restricted Stock Units and Dividend Equivalent rights set forth in this Agreement, I hereby appoint my spouse as my attorney-in-fact in respect to the exercise of any rights under this Agreement and agree to be bound by the provisions of the Agreement insofar as I may have any rights in said Agreement and any Restricted Stock Units, Dividend Equivalent rights, shares of Kilroy Realty Corporation or cash issued pursuant thereto under the community property laws or similar laws relating to marital property in effect in the state of our residence as of the date of the signing of this Agreement.

Dated: _______________, _____         ________________________________

Signature of Spouse

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APPENDIX A

TERMS AND CONDITIONS OF

RESTRICTED STOCK UNITS AND DIVIDEND EQUIVALENT RIGHTS

1.    Grant.The effective date of the award is the Grant Date. The total number of RSUs subject to the award is the total number of RSUs set forth in the Grant Notice. Except as otherwise expressly provided herein, all capitalized terms used in this Agreement and not otherwise defined shall have the meanings provided in the Plan.

2.    RSUs.Each RSU that vests in accordance with this Agreement shall represent the right to receive, as determined by the Committee in accordance with Section 6 below, either (i) a payment of one share of Stock or (ii) a payment in cash equal to the Fair Market Value of one share of Stock on the applicable Distribution Date (as defined below). Prior to actual payment in respect of any vested RSU, such RSU will represent an unsecured obligation of the Company, payable (if at all) only from the general assets of the Company.

3.    Dividend Equivalent Rights.

(a)    Each RSU granted hereunder is hereby granted in tandem with a corresponding Dividend Equivalent right. Such Dividend Equivalent right shall entitle the Participant to have a hypothetical bookkeeping account (established and maintained for purposes of tracking the RSUs and any additional RSUs credited to such account in respect of Dividend Equivalent rights in accordance with thisSection 3) (the “Account”) that is credited upon the Company’s payment of dividends to stockholders of outstanding shares of Stock if the Dividend Equivalent right is or was outstanding on the applicable Stock record date. Subject toSection 3(c)below, when suchdividends are so declared, the following shall occur:

(i) on the date that the Company pays a cash dividend in respect of outstanding shares of Stock, the Company shall credit the Participant’s Account with a number of full and fractional RSUs equal to the quotient of (A) the total number of RSUs credited to the Account but not yet distributed (including any RSUs granted hereunder and any additional RSUs credited with respect to Dividend Equivalent rights), multiplied by the per share dollar amount of such dividend, divided by (B) the Fair Market Value of a share of Stock on the date such dividend is paid,

(ii) on the date that the Company pays a Stock dividend in respect of outstanding shares of Stock, the Company shall credit the Participant’s Account with a number of full and fractional RSUs equal to the product of (A) the total number of RSUs credited to the Account but not yet distributed (including any RSUs granted hereunder and any additional RSUs credited with respect to Dividend Equivalent rights), multiplied by (B) the number of shares of Stock distributed with respect to such dividend per share of Stock, or

(iii) on the date that the Company pays any other type of distribution in respect of outstanding shares of Stock, the Company shall credit the Participant’s Account in an equitable manner based on the total number of RSUs held in the Account, as determined in the sole discretion of the Committee.

(b)    To the extent that any additional RSUs are credited to the Participant’s Account in respect of the Participant’s Dividend Equivalent rights, such additional RSUs shall be subject to the same vesting terms as the original RSUs to which they relate and shall also carry corresponding Dividend Equivalent rights.

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(c)    Dividend Equivalent rights shall remain outstanding from the Grant Date (or later date of grant of such Dividend Equivalent right in connection with the Company’s payment of a dividend) through the earlier to occur of (i) the termination or forfeiture for any reason of the RSU to which such Dividend Equivalent right corresponds, or (ii) the delivery to the Participant of payment for the RSU (in accordance with Section 6 below) to which such Dividend Equivalent right corresponds. For the avoidance of doubt, if a Dividend Equivalent right terminates after the applicable Stock record date for a Company dividend (other than due to the termination or forfeiture of the RSU to which such Dividend Equivalent right corresponds) and prior to the corresponding payment date thereof, the Participant shall still be entitled to payment of the Dividend Equivalent right amount determined in accordance with this Section 3, if and when the Company pays the underlying dividend; provided, however, that, unless otherwise provided by the Committee, such Dividend Equivalent right amount shall be made in cash (rather than RSUs to be paid in Stock).

(d)    Dividend Equivalent rights and any amounts that may become distributable in respect thereof shall be treated separately from the RSUs and the rights arising in connection therewith for purposes of the designation of time and form of payments required by Code Section 409A.

4.    Vesting.The RSUs shall vest in accordance with the vesting schedule provided in the Grant Notice. The date on which any RSUs vest pursuant to the terms of this Agreement is referred to herein as the “Vesting Date” of such RSUs.

5.    Termination of Employment or Service. Except as provided in the Grant Notice, the Participant must continue to provide services as an Employee, Consultant or member of the Board through the applicable Vesting Date in order to vest in the applicable installment of RSUs. Upon the Participant’s termination as an Employee, Consultant or member of the Board, as applicable, all RSUs that have not vested as of such termination (taking into consideration any vesting that may occur in connection with such termination as provided in this Section 5) shall automatically be forfeited and canceled without payment of consideration therefor.

6.    Distribution.

(a)    Distribution Date.Subject to Sections 6(d) and 10 below, payment with respect to RSUs issued under this Agreement (including any RSUs issued in respect of Dividend Equivalent rights) shall, to the extent vested, be paid to the Participant on or within sixty (60) days following the earliest to occur of (i) the date of the Participant’s “separation from service” within the meaning of Code Section 409A (a “Separation from Service”); (ii) the date of the occurrence of a 409A Change in Control Event (as defined below); (iii) the date of the Participant’s death or “disability” (within the meaning of Code Section 409A); and (iv) the Vesting Date applicable to such RSUs pursuant to Section 4 (any such date, a “Distribution Date”); provided, however, that if the Participant has elected to defer payment of the RSUs on the Participant’s Deferral Election Form (as indicated in the Grant Notice), the Participant’s deferred distribution election as set forth in the Deferral Election Form shall be given effect and the payment date elected by the Participant pursuant to such Deferral Election Form shall be the “Distribution Date” of the RSUs.

(b)    Distribution Payments. All distributions upon payment of the RSUs shall be made by the Company in the form of whole shares of Stock, and to the extent that any fractional RSUs become payable on a Distribution Date, such fractional RSUs shall be paid in cash (unless otherwise determined under Section 15.10 of the Plan). To the extent that any outstanding RSUs remain unvested as of an applicable Distribution Date (after taking into consideration any vesting which may occur in connection with the occurrence of such Distribution Date), then such RSUs shall, to the extent not forfeited in connection with such distribution, be paid as Restricted Stock, and the vesting schedule that applied to such RSUs immediately prior to such distribution shall continue to apply to such Restricted Stock; provided, however, that to the extent any such distributions are payable in cash in accordance with this Section 6(b), such cash amounts (determined as of the Distribution Date) shall instead be paid to the Participant on or within sixty (60) days after the date(s) on which the shares of Restricted Stock to which such cash payments relate would have vested in accordance with this Section 6(b) (and such cash payments shall be forfeitable on the same terms that would otherwise apply to such Restricted Stock).

A-2

(c)    Unforeseeable Emergency. If the Participant experiences an “unforeseeable emergency” within the meaning of Code Section 409A (an “Unforeseeable Emergency”), the Committee may, in its sole discretion, permit an early distribution of that portion of the Participant’s vested RSUs reasonably necessary to satisfy the emergency need giving rise to the Unforeseeable Emergency, including any taxes or penalties reasonably anticipated to result from such distribution and taking into consideration any funds that may become available as a result of the termination of any applicable deferral election in connection with such distribution.

(d)    Distributions Following Separations from Service. Notwithstanding anything herein to the contrary, no distribution hereunder shall be made to the Participant during the six (6)-month period following the Participant’s Separation from Service to the extent that the Company determines that paying such amounts at the time set forth in this Section 6 would be a prohibited distribution under Code Section 409A(a)(2)(B)(i). If the payment of any such amounts is delayed as a result of the previous sentence, then on the first business day following the end of such six (6)-month period (or such earlier date upon which such amount can be paid under Code Section 409A without resulting in a prohibited distribution, including as a result of the Participant’s death), the Company shall pay the Participant the cumulative amounts that would have otherwise been payable to the Participant during such period.

(e)    Distribution Timing. The time of distribution of the RSUs under this Agreement may not be changed except as may be permitted by the Committee in accordance with the Plan and Code Section 409A and the applicable Treasury Regulations promulgated thereunder. For purposes of clarity, no provision of the Plan (including, without limitation, Section 11.2 thereof) shall alter the time of distribution of the RSUs under this Agreement, except as the Committee may provide consistent with the preceding sentence.

(f)    409A Change in Control Event. For purposes of this Agreement, “409A Change in Control Event” means a “change in the ownership or effective control” of the Company or a “change in the ownership of a substantial portion of the assets” of the Company, in each case within the meaning of Code Section 409A.

7.    Tax Withholding. The Company shall have the authority and the right to deduct, withhold or require the Participant or beneficiary to remit to the Company an amount sufficient to satisfy federal, state, local and foreign taxes (including without limitation any income and employment tax obligations) required by law to be withheld with respect to any taxable event arising in connection with the RSUs and/or the Dividend Equivalent rights. To the extent that such obligations arise at the time that the RSUs are distributed to the Participant in shares of Stock, the Company may, in its sole discretion and in satisfaction of the foregoing requirement, require the Participant to deliver shares of Stock otherwise issuable under this Agreement (or allow the return of shares of Stock) having a Fair Market Value equal to the sums required to be withheld, provided, that the number of shares of Stock which may be so withheld (or returned) with respect to a taxable event arising in connection with the RSUs and/or the Dividend Equivalent rights shall be limited to the number of shares which have a Fair Market Value on the date of withholding equal to the aggregate amount of such liabilities based on the minimum statutory withholding rates for federal, state and local income tax and payroll tax purposes that areapplicable to such supplemental taxable income.

8.    Rights as Stockholder. Neither the Participant nor any person claiming under or through the Participant will have any of the rights or privileges of a stockholder of the Company in respect of any shares of Stock deliverable hereunder unless and until certificates representing such shares of Stock will have been issued, recorded on therecords of the Company or its transfer agents or registrars, and delivered to the Participant or any person claiming under or through the Participant.

A-3

9.    Non-Transferability. Neither the RSUs or Dividend Equivalent rights nor any interest or right therein or part thereof shall be transferred, assigned, pledged or hypothecated by the Participant in any way in favor of any party other than the Company or a Subsidiary (whether by operation of law or otherwise) and shall not be subjected to any lien, obligation or liability of the Participant to any party other than the Company or a Subsidiary, other than by the laws of descent and distribution. Upon any attempt by the Participant to transfer, assign, pledge, hypothecate or otherwise dispose of this grant, or any right or privilege conferred hereby, or upon any attempted sale by the Participant under any execution, attachment or similar process, this grant and the rights and privileges conferred hereby shall immediately become null and void. Notwithstanding the foregoing, the Company may assign any of its rights under this Agreement to single or multipleassignees and this Agreement shall inure to the benefit of the successors and assigns of the Company.

10.    Distribution of Stock. In the event shares of Stock are paid to the Participant in accordance herewith, the Company shall not be required to record any shares of Stock in the name of the Participant in the books and records of the Company’s transfer agent, and the Company shall not be required to issue or deliver any certificate or certificates for any shares of Stock prior to the fulfillment of all of the following conditions: (a) the admission of such shares to listing on all stock exchanges on which the Company’s common stock is then listed, (b) the completion of any registration or other qualification of such shares under any state or federal law or under rulings or regulations of the Securities and Exchange Commission or other governmental regulatory body, which the Company shall, in its sole and absolute discretion, deem necessary and advisable, (c) the obtaining of any approval or other clearance from any state or federal governmental agency that the Company shall, in its absolute discretion, determine to be necessary or advisable, and (d) the lapse of any such reasonable period of time following the Distribution Date as the Company may from time to time establish for reasons of administrative convenience. In the event that the Company delays a distribution or payment in settlement of RSUs because it determines that the issuance of shares of Stock in settlement of such RSUs will violate federal securities laws or other applicable law, such distribution or payment shall be made at the earliest date at which the Company reasonably determines that the making of such distribution or payment will not cause such violation, as required by Treasury Regulation Section 1.409A-2(b)(7)(ii). No payment shall be delayed under thisSection 10 if such delay will result in a violation of Code Section 409A.

11.    No Right to Continued Service. Nothing in the Plan or in this Agreement shall confer upon the Participant any right to continue as an Employee, Consultant, member of the Board, or other service provider of the Company or any Subsidiary, or shall interfere with or restrict in any way the rights of the Company or any Subsidiary, which are hereby expressly reserved, to discharge the Participant at any time for any reason whatsoever, with or without cause, except to the extent expressly providedotherwise in a written agreement between the Participant and the Company or any Subsidiary.

12.    Severability. In the event that any provision in this Agreement is held invalid or unenforceable, such provision will be severable from, and such invalidity orunenforceability will not be construed to have any effect on, the remaining provisions of this Agreement, which shall remain in full force and effect.

13.    Tax Consultation. The Participant understands that he or she may suffer adverse tax consequences in connection with the RSUs and Dividend Equivalent rights granted pursuant to this Agreement. The Participant represents that the Participant has consulted with any tax consultants that he or she deems advisable in connection with the RSUsand the Dividend Equivalent rights and that the Participant is not relying on the Company for tax advice.

14.    Amendment. Subject to Sections 16 and 18 below, this Agreement may only be amended, modified or terminated by a writing executed by the Participant and by a duly authorized representative of the Company.

15.    Relationship to other Benefits. Neither the RSUs, the Dividend Equivalent rights, nor payment in respect of the foregoing shall be taken into account in determining any benefits pursuant to anypension, retirement, savings, profit sharing, group insurance, welfare or other benefit plan of the Company or any Subsidiary.

A-4

16.    Code Section 409A. To the extent that the Company determines that any RSUs and/or Dividend Equivalent rights may not be compliant with or exempt from Code Section 409A, the Company may amend this Agreement in a manner intended to comply with the requirements of Code Section 409A or an exemption therefrom (including amendments with retroactive effect), or take any other actions as it deems necessary or appropriate to (a) comply with the requirements of Code Section 409A and/or (b) exempt the RSUs and/or the Dividend Equivalent rights from Code Section 409A and/or preserve the intended tax treatment of the benefits provided with respect to theRSUs. To the extent applicable, this Agreement shall be interpreted in accordance with the provisions of Code Section 409A.

17.    Clawback. The Participant agrees that all compensation paid or payable to the Participant pursuant to this Agreement shall be subject to (a) the provisions of any claw-back policy implemented by the Company to comply with applicable law or regulation (including stock exchange rules), including, without limitation, any claw-back policy adopted to comply with the requirements of the Dodd-Frank Wall Street Reform and Consumer Protection Act and any rules or regulations promulgated thereunder, and (b) any other claw-back required by applicable law.

18.    Conformity to Securities Laws. The Participant acknowledges that the Plan and this Agreement are intended to conform to the extent necessary with all provisions of the Securities Act and the Exchange Act, and any and all regulations and rules promulgated by the Securities and Exchange Commission thereunder, as well as all applicable state securities laws and regulations. Notwithstanding anything herein to the contrary, the Plan shall be administered, and the RSUs are granted, only in such a manner as to conform to such laws, rules and regulations. To the extent permitted by applicable law, the Plan and this Agreement shall be deemed amended to the extent necessary to conform to such laws, rules and regulations.

19.    Notices. Any notice to be given under the terms of this Agreement to the Company shall be addressed to the Company in care of the Secretary of the Company at the Company’s principal office, and any notice to be given to the Participant shall be addressed to the Participant at the Participant’s last address (physical or electronic) reflected on the Company’s records. Any notice shall be deemed duly given when sent by reputable overnight courier or by certified mail (return receipt requested) through the United States Postal Service.

20.    Entire Agreement. The Plan and this Agreement (including this Appendix A) constitute the entire agreement of the parties and supersede in their entirety all prior undertakings and agreements of the Company and the Participant with respect to the subject matter hereof.

21.    Governing Law. The laws of the State of Maryland shall govern the interpretation, validity, administration, enforcement and performance of the terms of this Agreementregardless of the law that might be applied under principles of conflicts of laws.

22.    Captions. Captions provided herein are for convenience only and are not to serve as a basis for interpretation or construction of this Agreement.

A-5

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, John Kilroy, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Kilroy Realty Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ John Kilroy

John Kilroy

President and Chief Executive Officer

Date: April 30, 2015

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Tyler H. Rose, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Kilroy Realty Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Tyler H. Rose

Tyler H. Rose

Executive Vice President and

Chief Financial Officer

Date: April 30, 2015

EX-31.3

Exhibit 31.3

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, John Kilroy, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Kilroy Realty, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ John Kilroy

John Kilroy

President and Chief Executive Officer

Kilroy Realty Corporation, sole general partner of

  Kilroy Realty, L.P.

Date: April 30, 2015

EX-31.4

Exhibit 31.4

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Tyler H. Rose, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Kilroy Realty, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's Board of Directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

/s/ Tyler H. Rose

Tyler H. Rose

Executive Vice President and

Chief Financial Officer

Kilroy Realty Corporation, sole general partner of

Kilroy Realty, L.P.

Date: April 30, 2015

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation (the “Company”) hereby certifies, to his knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarter ended March 31, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ John Kilroy
John Kilroy
President and Chief Executive Officer
Date:	April 30, 2015

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of the Company or Kilroy Realty, L.P. under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation (the “Company”) hereby certifies, to his knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarter ended March 31, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Tyler H. Rose
Tyler H. Rose
Executive Vice President and Chief Financial Officer
Date:	April 30, 2015

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of the Company or Kilroy Realty, L.P. under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.3

Exhibit 32.3

Certification of Chief Executive Officer

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation, the sole general partner of Kilroy Realty, L.P. (the “Operating Partnership”), hereby certifies, to his knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarter ended March 31, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

/s/ John Kilroy
John Kilroy
President and Chief Executive Officer
Kilroy Realty Corporation, sole general partner of Kilroy Realty, L.P.
Date:	April 30, 2015

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of Kilroy Realty Corporation or the Operating Partnership under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.4

Exhibit 32.4

Certification of Chief Financial Officer

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation, the sole general partner of Kilroy Realty, L.P. (the "Operating Partnership"), hereby certifies, to his knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarter ended March 31, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

/s/ Tyler H. Rose
Tyler H. Rose
Executive Vice President and Chief Financial Officer
Kilroy Realty Corporation, sole general partner of Kilroy Realty, L.P.
Date:	April 30, 2015

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of Kilroy Realty Corporation or the Operating Partnership under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Partners' Capital of the Operating Partnership Ownership Interest (Tables)

3 Months Ended

Mar. 31, 2015

Noncontrolling Interest [Abstract]

Redeemable Noncontrolling Interest

The following table sets forth the number of common units held by the Company and the number of common units held by non-affiliate 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:

	March 31, 2015		December 31, 2014		March 31, 2014
Company owned common units in the Operating Partnership	88,031,377		86,259,684		82,218,332
Company owned general partnership interest	98.0	%	98.0	%	97.9	%
Noncontrolling common units of the Operating Partnership	1,793,170		1,804,200		1,804,200
Ownership interest of noncontrolling interest	2.0	%	2.0	%	2.1	%

XML

Unsecured Revolving Credit Facility (Details 3) (USD $)	3 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Debt Instrument [Line Items]
Unsecured debt	$ 1,783,280,000		$ 1,783,121,000
Terms of the Credit Facility
Unsecured line of credit	130,000,000		140,000,000
Kilroy Realty, L.P. [Member]
Debt Instrument [Line Items]
Unsecured debt	1,783,280,000		1,783,121,000
Terms of the Credit Facility
Unsecured line of credit	130,000,000		140,000,000
Kilroy Realty, L.P. [Member] | Revolving Credit Facility [Member]
Terms of the Credit Facility
Unsecured line of credit			140,000,000
Remaining borrowing capacity			460,000,000
Total borrowing capacity	600,000,000	[1]	600,000,000	[1]
Debt Instrument, Contingent Additional Borrowings	311,000,000
Debt Instrument, Basis Spread on Variable Rate	1.25%
Debt Issuance Cost	5,600,000
Term Loan Facility [Member] | Kilroy Realty, L.P. [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Unsecured debt	$ 39,000,000

[1] We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $311.0 million under an accordion feature under the terms of the unsecured revolving credit facility and term loan facility.

XML

Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Deferred Leasing Costs and Acquisition-related Intangible Assets, Net
Total deferred leasing costs and acquisition-related intangible assets, net	$ 182,251		$ 201,926
Acquisition-related Intangible Liabilities, Net
Total acquisitions-related intangible liabilities, net	40,541	[1],[2]	43,427	[1]
Deferred Leasing Costs [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets, Net
Finite-lived intangible assets, gross	201,548		216,102
Finite-lived intangible assets accumulated amortization	(74,864)		(74,904)
Finite-lived intangible assets, net	126,684		141,198
Above-Market Leases [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets, Net
Finite-lived intangible assets, gross	19,194		20,734
Finite-lived intangible assets accumulated amortization	(13,323)		(13,952)
Finite-lived intangible assets, net	5,871	[3]	6,782
In-Place Leases [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets, Net
Finite-lived intangible assets, gross	93,222		97,250
Finite-lived intangible assets accumulated amortization	(43,993)		(43,773)
Finite-lived intangible assets, net	49,229		53,477
Below Market Ground Lease Obligation [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets, Net
Finite-lived intangible assets, gross	490		490
Finite-lived intangible assets accumulated amortization	(23)		(21)
Finite-lived intangible assets, net	467	[4]	469
Below Market Lease [Member]
Acquisition-related Intangible Liabilities, Net
FiniteLivedIntangibleLiabilitiesGross	64,792		68,051
Accumulated amortization	(30,222)		(30,620)
Acquisition-related Intangible Liabilities, net	34,570	[5]	37,431
Above-Market Ground Lease Obligation [Member]
Acquisition-related Intangible Liabilities, Net
FiniteLivedIntangibleLiabilitiesGross	6,320		6,320
Accumulated amortization	(349)		(324)
Acquisition-related Intangible Liabilities, net	$ 5,971	[6]	$ 5,996

[1] Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

[2] Excludes deferred leasing costs and acquisition-related intangible assets and liabilities related to properties held for sale at March 31, 2015.

[3] Represents estimated annual amortization related to above-market operating leases. Amounts will be recorded as a decrease to rental income in the consolidated statements of operations.

[4] Represents estimated annual amortization related to below-market ground lease obligations. Amounts will be recorded as an increase to ground lease expense in the consolidated statements of operations.

[5] Represents estimated annual amortization related to below-market operating leases. Amounts will be recorded as an increase to rental income in the consolidated statements of operations.

[6] Represents estimated annual amortization related to above-market ground lease obligations. Amounts will be recorded as a decrease to ground lease expense in the consolidated statements of operations.

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Debt Maturities (Details) (Debt [Member], Kilroy Realty, L.P. [Member], USD $)	Mar. 31, 2015
Debt [Member] | Kilroy Realty, L.P. [Member]
Stated debt maturities and scheduled amortization payments, excluding debt discounts
Remaining 2015	$ 366,630,000
2016	99,431,000
2017	71,748,000
2018	451,728,000
2019	395,369,000
Thereafter	1,041,644,000
Total	2,426,550,000	[1]
Unamortized premium	$ (3,500,000)

[1] Includes gross principal balance of outstanding debt before impact of net unamortized premiums totaling approximately $3.5 million

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Acquisitions (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Accounts Payable and Accrued Liabilities	$ 217,352,000	$ 225,830,000
Dexter Project [Member] [Member]
Business Acquisition [Line Items]
Payments to Acquire Land	$ 49,500,000

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Acquisitions (Tables)

3 Months Ended

Mar. 31, 2015

Business Combinations [Abstract]

Schedule of Significant Acquisitions

Development Project Acquisitions

During the threemonths ended March 31, 2015, we acquired the development opportunity listed below from an unrelated third party. The acquisition was funded with proceeds from the Company’s at-the-market stock offering program (see Note 8) and prior year disposition proceeds.

Project	Date of Acquisition	Type	Purchase Price (in millions)
333 Dexter (1)(2)	February 13, 2015	Land	$	49.5

_______________

(1) Acquisition comprised of four adjacent parcels in the South Lake Union submarket of Seattle, Washington located at 330 Dexter Avenue North, 333 Dexter Avenue North, 401 Dexter Avenue North, and 400 Aurora Avenue North.

(2) In connection with this acquisition, we also assumed $2.4 million in accrued liabilities and acquisition costs which are not included in the purchase price above. As of March 31, 2015, the underlying assets were included as undeveloped land and construction in progress in our consolidated balance sheets.

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Noncontrolling Interests on the Company's Consolidated Financial Statements (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Noncontrolling Interest [Abstract]
Percentage of general partnership interest owned by the company in the Operating Partnership	98.00%	98.00%	97.90%
Percentage of Common limited partnership interest owned by certain non-affiliated investors and certain directors and officers of the Company in the Operating Partnership	2.00%	2.00%	2.10%
Common units outstanding held by common limited partners	1,793,170	1,804,200	1,804,200
Common stock, par value	$ 0.01
Aggregate value upon redemption of outstanding noncontrolling common units	$ 137,900,000	$ 126,800,000
Noncontrolling Interest in Variable Interest Entity	$ 5,862,000	$ 5,862,000

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Share-Based Compensation

3 Months Ended

Mar. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

Share-Based Compensation

Stockholder Approved Equity Compensation Plans

As of March 31, 2015, we maintained one share-based incentive compensation plan, the Kilroy Realty 2006 Incentive Award Plan as amended (the “2006 Plan”). As of March 31, 2015, 494,405 shares were available for grant under the 2006 Plan. The calculation of shares available for grant includes a reserve for a sufficient number of shares to cover the vesting and payment of performance-based vesting awards at the target levels for either performance and/or market conditions with outstanding performance periods. At our Annual Meeting of Stockholders, currently scheduled to be held on May 21, 2015, stockholders will be asked to approve an amendment and restatement of the 2006 Plan, which includes an increase in the share limit by 1,200,000 shares so the new aggregate share limit for the 2006 Plan would be 8,320,000 shares.

2015 Share-Based Compensation Grants

On January 27, 2015, the Executive Compensation Committee of the Company’s Board of Directors awarded 212,468 restricted stock units (“RSUs”) to certain officers of the Company under the 2006 Plan, which included 127,657 RSUs, or 60%, that are subject to market and performance-based vesting requirements (the “2015 Performance-Based RSUs”) and 84,811 RSUs, or 40%, that are subject to time-based vesting requirements (the “2015 Time-Based RSUs”).

2015 Performance-Based RSU Grant

The 2015 Performance-Based RSUs are scheduled to vest at the end of a three-year period based upon the achievement of pre-set FFO per share goals (the “performance condition”) for the year ending December 31, 2015 and also based upon the average annual relative total stockholder return targets (the “market condition”) for the three-year period ending December 31, 2017. The 2015 Performance-Based RSUs are also subject to a three-year service vesting provision and will cliff vest at the end of the three-year period. The number of 2015 Performance-Based RSUs ultimately earned, and therefore the compensation costs for these awards, could fluctuate from the 127,657 RSUs granted based upon the levels of achievement for both the FFO per share and relative stockholder return metrics. During the 2015 performance period, the estimate of the number of awards earned are evaluated quarterly based on our forecasted level of achievement of the FFO hurdle. Compensation expense for the 2015 Performance-Based RSU grant will be recorded on a straight-line basis over the three-year period.

Each 2015 Performance-Based RSU represents the right to receive one share of our common stock in the future. The total fair value of the 2015 Performance-Based RSU grant was $10.1 million at January 27, 2015 and was calculated using a Monte Carlo simulation pricing model based on the assumptions in the table below. The determination of the fair value of the 2015 Performance-Based RSU grant takes into consideration the likelihood of achievement of both the performance condition and the market condition discussed above. For the three months ended March 31, 2015, we recorded compensation expense based upon the $78.55 fair value at January 27, 2015. The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing model:

	Fair Value Assumptions
Fair value per share at January 27, 2015	$78.55
Expected share price volatility	20.00%
Risk-free interest rate	0.92%
Remaining expected life	2.9 years

The computation of expected volatility is based on a blend of the historical volatility of our shares of common stock over approximately six years, as that is expected to be most consistent with future volatility and equates to a time period twice as long as the approximate three-year remaining performance period of the RSUs and implied volatility data based on the observed pricing of six month publicly-traded options on our shares of common stock. The risk-free interest rate is based on the yield curve on zero-coupon U.S. Treasury STRIP securities in effect at January 27, 2015. The expected dividend yield is estimated by examining the average of the historical dividend yield levels over the remaining 2.9 year term of the RSUs and our current annualized dividend yield as of January 27, 2015. The expected life of the RSUs is equal to the remaining 2.9 year vesting period at January 27, 2015.

2015 Time-Based RSU Grant

The 2015 Time-Based RSUs are scheduled to vest in three equal installments beginning on January 5, 2016 through January 5, 2018. Compensation expense for the 2015 Time-Based RSUs will be recognized on a straight-line basis over the three-year service vesting period. Each 2015 Time-Based RSU represents the right to receive one share of our common stock in the future. The total fair value of the 2015 Time-Based RSU grant was $6.4 million, which was based on the $75.34 closing share price of the Company’s common stock on the NYSE on January 27, 2015.

Share-Based Award Activity

During the three months ended March 31, 2015, 237,000 non-qualified stock options were exercised and issued at an exercise price per share equal to $42.61. As of March 31, 2015, we had 765,000 stock options outstanding.

Share-Based Compensation Cost Recorded During the Period

The total compensation cost for all share-based compensation programs was $4.3 million and $2.9 million for the three months ended March 31, 2015 and 2014, respectively. Of the total share-based compensation costs, $0.7 million and $0.4 million was capitalized as part of real estate assets for the three months ended March 31, 2015 and 2014, respectively. As of March 31, 2015, there was approximately $42.5 million of total unrecognized compensation cost related to nonvested incentive awards granted under share-based compensation arrangements that is expected to be recognized over a weighted-average period of 2.5 years. The remaining compensation cost related to these nonvested incentive awards had been recognized in periods prior to March 31, 2015.

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Receivables (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Current Receivables, net
Current receivables	$ 10,107	[1]	$ 9,228	[1]
Allowance for uncollectible tenant receivables	(1,985)	[1]	(1,999)	[1]
Current receivables, net	8,122	[1]	7,229	[1]
Deferred Rent Receivables, net
Deferred rent receivables	170,736	[2]	158,405
Allowance for deferred rent receivables	(2,155)	[2]	(1,989)
Deferred rent receivables, net	$ 168,581	[2]	$ 156,416

[1] Excludes current receivables, net related to properties held for sale.

[2] Excludes deferred rent receivables, net related to properties held for sale as of March 31, 2015.

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Net Income Available to Common Stockholders Per Share of the Company (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Net income (loss) available to common stockholders

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands, except share and per share amounts)
Numerator:
Income from continuing operations	$	44,002		$	10,874
Income from continuing operations attributable to noncontrolling common units of the Operating Partnership	(815		)	(160		)
Preferred dividends	(3,313		)	(3,313		)
Allocation to participating securities (1)	(415		)	(427		)
Numerator for basic and diluted income from continuing operations available to common stockholders	39,459			6,974
Income from discontinued operations (2)	—			91,058
Income from discontinued operations attributable to noncontrolling common units of the Operating Partnership (2)	—			(1,927		)
Numerator for basic and diluted net income available to common stockholders	$	39,459		$	96,105
Denominator:
Basic weighted average vested shares outstanding	86,896,776			82,124,538
Effect of dilutive securities	537,590			2,015,532
Diluted weighted average vested shares and common share equivalents outstanding	87,434,366			84,140,070
Basic earnings per share:
Income from continuing operations available to common stockholders per share	$	0.45		$	0.08
Income from discontinued operations per common share (2)	0.00			1.09
Net income available to common stockholders per share	$	0.45		$	1.17
Diluted earnings per share:
Income from continuing operations available to common stockholders per share	$	0.45		$	0.08
Income from discontinued operations per common share (2)	0.00			1.06
Net income available to common stockholders per share	$	0.45		$	1.14

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

(2) The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

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Secured and Unsecured Debt of the Operating Partnership (Tables) (Kilroy Realty, L.P. [Member])

3 Months Ended

Mar. 31, 2015

Debt Instrument [Line Items]

Schedule of Term Loan Facilities [Table Text Block]

The following table summarizes the balance and terms of our term loan facility as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Outstanding borrowings	$	150,000		$	150,000
Interest rate (1)	1.58		%	1.56		%
Maturity date	July 2019

Unsecured Revolving Credit Facility

The following table summarizes the balance and terms of our unsecured revolving credit facility as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Outstanding borrowings	$	130,000		$	140,000
Remaining borrowing capacity	470,000			460,000
Total borrowing capacity (1)	$	600,000		$	600,000
Interest rate (2)	1.43		%	1.41		%
Facility fee-annual rate (3)	0.250%
Maturity date	July 2019

_______________

(1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $311.0 million under an accordion feature under the terms of the unsecured revolving credit facility and term loan facility.

(2) Our revolving credit facility interest rate was calculated based on an annual rate of LIBOR plus 1.250%.

(3) Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of March 31, 2015, $5.6 million of deferred financing costs remains to be amortized through the maturity date of our unsecured revolving credit facility.

Stated debt maturities and scheduled amortization payments, excluding debt discounts

The following table summarizes the stated debt maturities and scheduled amortization payments, excluding debt discounts and premiums, as of March 31, 2015:

Year	(in thousands)
Remaining 2015	$	366,630
2016	99,431
2017	71,748
2018	451,728
2019	395,369
Thereafter	1,041,644
Total (1)	$	2,426,550

________________________

(1) Includes gross principal balance of outstanding debt before impact of net unamortized premiums totaling approximately $3.5 million

Capitalized interest and loan fees

The following table sets forth gross interest expense reported in continuing operations, including debt discount/premium and loan cost amortization, net of capitalized interest, for the three months ended March 31, 2015 and 2014. The interest expense capitalized was recorded as a cost of development and redevelopment, and increased the carrying value of undeveloped land and construction in progress.

	Three Months Ended March 31,
	2015			2014
	(in thousands)
Gross interest expense	$	27,749		$	28,034
Capitalized interest and loan fees	(10,871		)	(10,782		)
Interest expense	$	16,878		$	17,252

Secured Debt [Member]

Debt Instrument [Line Items]

Balance and significant terms of debt

The following table sets forth the composition of our secured debt as of March 31, 2015 and December 31, 2014:

Type of Debt	Annual Stated Interest Rate (1)	GAAP Effective Rate (1)(2)	Maturity Date	March 31, 2015 (3)		December 31, 2014 (3)
				(in thousands)
Mortgage note payable	4.27%	4.27%	February 2018	$	130,164	$	130,767
Mortgage note payable (4)	4.48%	4.48%	July 2027	97,000		97,000
Mortgage note payable (4)	6.05%	3.50%	June 2019	88,411		89,242
Mortgage note payable	6.51%	6.51%	February 2017	66,383		66,647
Mortgage note payable (4)	5.23%	3.50%	January 2016	52,332		52,793
Mortgage note payable (4)	5.57%	3.25%	February 2016	39,895		40,258
Mortgage note payable(4)	5.09%	3.50%	August 2015	34,178		34,311
Mortgage note payable(5)	4.94%	4.00%	April 2015	—		26,285
Mortgage note payable	7.15%	7.15%	May 2017	5,940		6,568
Other	Various	Various	Various	2,422		2,421
Total				$	516,725	$	546,292

______________

(1) All interest rates presented are fixed-rate interest rates.

(2) This represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of discounts/premiums, excluding debt issuance costs.

(3) Amounts reported include the amounts of unamortized debt premiums of $9.2 million and $10.3 million as of March 31, 2015 and December 31, 2014, respectively.

(4) The secured debt and the related properties that secure the debt are held in a special purpose entity and the properties are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

Senior Notes [Member]

Debt Instrument [Line Items]

Balance and significant terms of debt

The following table summarizes the balance and significant terms of the registered unsecured senior notes issued by the Operating Partnership as of March 31, 2015 and December 31, 2014:

					Principal Amount as of
	Issuance date	Maturity date	Stated coupon rate	Effective interest rate (1)	March 31, 2015			December 31, 2014
					(in thousands)
4.250% Unsecured Senior Notes (2)	July 2014	August 2029	4.250%	4.350%	$	400,000		$	400,000
Unamortized discount					(4,273		)	(4,348		)
Net carrying amount					$	395,727		$	395,652
3.800% Unsecured Senior Notes (3)	January 2013	January 2023	3.800%	3.804%	$	300,000		$	300,000
Unamortized discount					(77		)	(79		)
Net carrying amount					$	299,923		$	299,921
4.800% Unsecured Senior Notes (3)	July 2011	July 2018	4.800%	4.827%	$	325,000		$	325,000
Unamortized discount					(246		)	(265		)
Net carrying amount					$	324,754		$	324,735
6.625% Unsecured Senior Notes (4)	May 2010	June 2020	6.625%	6.743%	$	250,000		$	250,000
Unamortized discount					(1,101		)	(1,154		)
Net carrying amount					$	248,899		$	248,846
5.000% Unsecured Senior Notes (5)	November 2010	November 2015	5.000%	5.014%	$	325,000		$	325,000
Unamortized discount					(23		)	(33		)
Net carrying amount					$	324,977		$	324,967

_______________________

(1) This represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of initial issuance discounts, excluding debt issuance costs.

(2) Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year.

(3) Interest on these notes is payable semi-annually in arrears on January 15th and July 15th of each year.

(4) Interest on these notes is payable semi-annually in arrears on June 1st and December 1st of each year.

(5) Interest on these notes is payable semi-annually in arrears on May 3rd and November 3rd of each year.

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Exhangeable Senior Notes (Details) (Term Loan Facility [Member], Line of Credit [Member], Kilroy Realty, L.P. [Member])	3 Months Ended
	Mar. 31, 2014
Term Loan Facility [Member] | Line of Credit [Member] | Kilroy Realty, L.P. [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.56%	[1]

[1] Our unsecured term loan facility interest rate was calculated based on an annual rate of LIBOR plus 1.40%.

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Commitments and Contingencies (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Other Commitment	$ 412.6
Accrued Environmental Loss Contingencies, Noncurrent	$ 16.1

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Real Estate Assets Held for Sale and Dispositions (Details) (USD $)	3 Months Ended					0 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014	Jan. 15, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of land (Note 3)	$ 17,268,000		$ 0
Proceeds from Sale of Real Estate Held-for-investment	25,563,000		309,824,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Land and improvements	38,706,000
Disposal Group, Including Discontinued Operation, Buildings and Improvements	198,125,000
Disposal Group, Including Discontinued Operation, Total real estate held-for-sale	236,831,000
Disposal Group, Including Discontinued Operation, Accumulated depreciation and amortization	66,421,000
Disposal Group, Including Discontinued Operation, Total real estate held for sale, net	170,410,000
Disposal Group, Including Discontinued Operation, Current receivables, net	185,000
Disposal Group, Including Discontinued Operation, Deferred rent receivables, net	7,285,000
Disposal Group, Including Discontinued Operation, Deferred leasing costs and acquisition-related intangible assets, net	12,364,000
Disposal Group, Including Discontinued Operation, Prepaid expenses and other assets, net	507,000
Disposal Group, Including Discontinued Operation, Real estate and other assets held for sale, net	190,751,000				8,211,000
Disposal Group, Including Discontinued Operation, Accounts payable, accrued expenses and other liabilities	7,376,000
Disposal Group, Including Discontinued Operation, Deferred revenue and acquisition-related intangible liabilities, net	1,367,000
Disposal Group, Including Discontinued Operation, Rents received in advance and tenant security deposits	1,025,000
Disposal Group, Including Discontinued Operations, Liabilities and deferred revenue of real estate assets held for sale	9,768,000				56,000
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Income from discontinued operations	0		943,000
Gains on dispositions of discontinued operations	0		90,115,000
Total income from discontinued operations	0	[1]	91,058,000	[1]
Redmond, WA Operating Property [Member] [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings	1
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net Rentable Area	122,103
San Diego Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings	9	[2]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net Rentable Area	922,741	[2]
Restricted cash [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sale of Real Estate Held-for-investment					59,200,000
Properties Held for Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings	10
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net Rentable Area	1,044,844
Properties Held for Sale [Member] | Von Karman, Irvine, California [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Dispositions Sales Price						$ 26,000,000

[1] The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

[2] The San Diego Properties include the following: 6260 Sequence Drive, 6290 Sequence Drive, 6310 Sequence Drive, 6340 Sequence Drive, 6350 Sequence Drive, 10770 Wateridge Circle, 4921 Directors Place, 6200 Greenwich Drive, and 6220 Greenwich Drive. The properties are being sold in two tranches. The Company completed the sale of the first tranche for gross proceeds of approximately $95.0 million on April 15, 2015.

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Consolidated Balance Sheets (KILROY REALTY, L.P.) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
REAL ESTATE ASSETS:
Land and improvements	$ 838,927		$ 877,633
Buildings and improvements	3,880,883		4,059,639
Undeveloped land and construction in progress (Note 2)	1,265,659		1,120,660
Total real estate assets held for investment	5,985,469		6,057,932
Accumulated depreciation and amortization	(921,279)		(947,664)
Total real estate assets held for investment, net ($171,120 and $211,755 of VIE, respectively, Note 1)	5,064,190		5,110,268
REAL ESTATE ASSETS AND OTHER ASSETS HELD FOR SALE, NET (Note 3)	190,751		8,211
CASH AND CASH EQUIVALENTS	50,181		23,781
RESTRICTED CASH (Note 1)	8,287		75,185
MARKETABLE SECURITIES (Note 12)	13,337		11,971
CURRENT RECEIVABLES, NET (Note 5)	8,122	[1]	7,229	[1]
DEFERRED RENT RECEIVABLES, NET (Note 5)	168,581	[2]	156,416
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Note 4)	182,251		201,926
DEFERRED FINANCING COSTS, NET	17,346		18,374
PREPAID EXPENSES AND OTHER ASSETS, NET	22,434		20,375
TOTAL ASSETS	5,725,480		5,633,736
LIABILITIES:
Secured debt (Notes 6 and 12)	516,725	[3]	546,292	[3]
Unsecured debt, net (Notes 6 and 12)	1,783,280		1,783,121
Unsecured line of credit (Notes 6 and 12)	130,000		140,000
Accounts payable, accrued expenses and other liabilities	217,352		225,830
Accrued distributions (Note 15)	33,532		32,899
Deferred revenue and acquisition-related intangible liabilities, net (Note 4)	128,730		132,239
Rents received in advance and tenant security deposits	46,887		49,363
Liabilities of real estate assets held for sale (Note 3)	9,768		56
Total liabilities	2,866,274		2,909,800
COMMITMENTS AND CONTINGENCIES (Note 11)
Partners’ Capital (Note 9):
TOTAL LIABILITIES AND EQUITY	5,725,480		5,633,736
Kilroy Realty, L.P. [Member]
REAL ESTATE ASSETS:
Land and improvements	838,927		877,633
Buildings and improvements	3,880,883		4,059,639
Undeveloped land and construction in progress (Note 2)	1,265,659		1,120,660
Total real estate assets held for investment	5,985,469		6,057,932
Accumulated depreciation and amortization	(921,279)		(947,664)
Total real estate assets held for investment, net ($171,120 and $211,755 of VIE, respectively, Note 1)	5,064,190		5,110,268
REAL ESTATE ASSETS AND OTHER ASSETS HELD FOR SALE, NET (Note 3)	190,751		8,211
CASH AND CASH EQUIVALENTS	50,181		23,781
RESTRICTED CASH (Note 1)	8,287		75,185
MARKETABLE SECURITIES (Note 12)	13,337		11,971
CURRENT RECEIVABLES, NET (Note 5)	8,122		7,229
DEFERRED RENT RECEIVABLES, NET (Note 5)	168,581		156,416
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Note 4)	182,251		201,926
DEFERRED FINANCING COSTS, NET	17,346		18,374
PREPAID EXPENSES AND OTHER ASSETS, NET	22,434		20,375
TOTAL ASSETS	5,725,480		5,633,736
LIABILITIES:
Secured debt (Notes 6 and 12)	516,725		546,292
Unsecured debt, net (Notes 6 and 12)	1,783,280		1,783,121
Unsecured line of credit (Notes 6 and 12)	130,000		140,000
Accounts payable, accrued expenses and other liabilities	217,352		225,830
Accrued distributions (Note 15)	33,532		32,899
Deferred revenue and acquisition-related intangible liabilities, net (Note 4)	128,730		132,239
Rents received in advance and tenant security deposits	46,887		49,363
Liabilities of real estate assets held for sale (Note 3)	9,768		56
Total liabilities	2,866,274		2,909,800
Partners’ Capital (Note 9):
Common units, 88,031,377 and 86,259,684 held by the general partner and 1,793,170 and 1,804,200 held by common limited partners issued and outstanding, respectively	2,657,095		2,521,900
Total partners’ capital	2,849,506		2,714,311
Noncontrolling interests in consolidated subsidiaries (Note 1)	9,700		9,625
Total capital	2,859,206		2,723,936
TOTAL LIABILITIES AND EQUITY	5,725,480		5,633,736
Series G Cumulative Redeemable Preferred Unit [Member] | Kilroy Realty, L.P. [Member]
Partners’ Capital (Note 9):
Redeemable Preferred stock	96,155		96,155
Series H Cumulative Redeemable Preferred Unit [Member] | Kilroy Realty, L.P. [Member]
Partners’ Capital (Note 9):
Redeemable Preferred stock	$ 96,256		$ 96,256

[1] Excludes current receivables, net related to properties held for sale.

[2] Excludes deferred rent receivables, net related to properties held for sale as of March 31, 2015.

[3] Amounts reported include the amounts of unamortized debt premiums of $9.2 million and $10.3 million as of March 31, 2015 and December 31, 2014, respectively.

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Fair Value Measurements and Disclosures (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Sep. 30, 2013	Dec. 31, 2014
Fair value adjustment of marketable securities and deferred compensation plan liability
Net gain on marketable securities	$ 388		$ 154
Trading Securities	13,337			11,971
Fair Value (Level 1) [Member]
Assets and Liabilities Reported at Fair Value
Marketable securities	$ 13,337	[1],[2]		$ 11,971	[1],[2]

[1] The marketable securities are held in a limited rabbi trust.

[2] Based on quoted prices in active markets for identical securities.

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Net Income Available to Common Unitholders Per Unit of the Operating Partnership (Tables)

3 Months Ended

Mar. 31, 2015

Net Income Available To Common Unitholders [Line Items]

Net income (loss) available to common unitholders

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands, except share and per share amounts)
Numerator:
Income from continuing operations	$	44,002		$	10,874
Income from continuing operations attributable to noncontrolling common units of the Operating Partnership	(815		)	(160		)
Preferred dividends	(3,313		)	(3,313		)
Allocation to participating securities (1)	(415		)	(427		)
Numerator for basic and diluted income from continuing operations available to common stockholders	39,459			6,974
Income from discontinued operations (2)	—			91,058
Income from discontinued operations attributable to noncontrolling common units of the Operating Partnership (2)	—			(1,927		)
Numerator for basic and diluted net income available to common stockholders	$	39,459		$	96,105
Denominator:
Basic weighted average vested shares outstanding	86,896,776			82,124,538
Effect of dilutive securities	537,590			2,015,532
Diluted weighted average vested shares and common share equivalents outstanding	87,434,366			84,140,070
Basic earnings per share:
Income from continuing operations available to common stockholders per share	$	0.45		$	0.08
Income from discontinued operations per common share (2)	0.00			1.09
Net income available to common stockholders per share	$	0.45		$	1.17
Diluted earnings per share:
Income from continuing operations available to common stockholders per share	$	0.45		$	0.08
Income from discontinued operations per common share (2)	0.00			1.06
Net income available to common stockholders per share	$	0.45		$	1.14

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

(2) The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

Kilroy Realty, L.P. [Member]

Net Income Available To Common Unitholders [Line Items]

Net income (loss) available to common unitholders

The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net income available to common unitholders for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands, except unit and per unit amounts)
Numerator:
Income from continuing operations	$	44,002		$	10,874
Income from continuing operations attributable to noncontrolling interests in consolidated subsidiaries	(75		)	(65		)
Preferred distributions	(3,313		)	(3,313		)
Allocation to participating securities (1)	(415		)	(427		)
Numerator for basic and diluted income from continuing operations available to common unitholders	40,199			7,069
Income from discontinued operations (2)	—			91,058
Numerator for basic and diluted net income available to common unitholders	$	40,199		$	98,127
Denominator:
Basic weighted average vested units outstanding	88,693,306			83,928,993
Effect of dilutive securities	537,590			2,015,532
Diluted weighted average vested units and common unit equivalents outstanding	89,230,896			85,944,525
Basic earnings per unit:
Income from continuing operations available to common unitholders per unit	$	0.45		$	0.08
Income from discontinued operations per common unit (2)	0.00			1.09
Net income available to common unitholders per unit	$	0.45		$	1.17
Diluted earnings per unit:
Income from continuing operations available to common unitholders per unit	$	0.45		$	0.08
Income from discontinued operations per common unit (2)	0.00			1.06
Net income available to common unitholders per unit	$	0.45		$	1.14

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

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Net Income Available to Common Unitholders Per Unit of the Operating Partnership

3 Months Ended

Mar. 31, 2015

Earnings Per Unit [Abstract]

Net Income (Loss) Available to Common Unitholders per Unit of the Operating Partnership

Net Income Available to Common Unitholders Per Unit of the Operating Partnership

The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net income available to common unitholders for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands, except unit and per unit amounts)
Numerator:
Income from continuing operations	$	44,002		$	10,874
Income from continuing operations attributable to noncontrolling interests in consolidated subsidiaries	(75		)	(65		)
Preferred distributions	(3,313		)	(3,313		)
Allocation to participating securities (1)	(415		)	(427		)
Numerator for basic and diluted income from continuing operations available to common unitholders	40,199			7,069
Income from discontinued operations (2)	—			91,058
Numerator for basic and diluted net income available to common unitholders	$	40,199		$	98,127
Denominator:
Basic weighted average vested units outstanding	88,693,306			83,928,993
Effect of dilutive securities	537,590			2,015,532
Diluted weighted average vested units and common unit equivalents outstanding	89,230,896			85,944,525
Basic earnings per unit:
Income from continuing operations available to common unitholders per unit	$	0.45		$	0.08
Income from discontinued operations per common unit (2)	0.00			1.09
Net income available to common unitholders per unit	$	0.45		$	1.17
Diluted earnings per unit:
Income from continuing operations available to common unitholders per unit	$	0.45		$	0.08
Income from discontinued operations per common unit (2)	0.00			1.06
Net income available to common unitholders per unit	$	0.45		$	1.14

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

(2) The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

The impact of the contingently issuable units were considered in our diluted earnings per unit calculation for the three months ended March 31, 2015 and 2014 because the Operating Partnership reported income from continuing operations attributable to common unitholders in the respective periods and the effect was dilutive. As of March 31, 2015 contingently issuable shares consist of stock options and 182,610 market measure-based RSUs. As of March 31, 2014 contingently issuable shares consist of stock options and the impact of the 4.25% Exchangeable Notes prior to their maturity and settlement in November 2014. As of March 31, 2014 the 182,610 market measure-based RSUs were not included in dilutive securities since they were considered contingently issuable shares as not all the necessary performance conditions had been met. The 2015 Performance-Based RSUs and our other nonvested market measure-based RSUs are not included in dilutive securities as of March 31, 2015 and 2014 because they are not included until all the necessary performance conditions have been met.

See Note 10 “Share-Based Compensation” for additional information regarding the stock options and other share-based compensation.

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Net Income Available to Common Stockholders Per Share of the Company

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Net Income (Loss) Available to Common Stockholders Per Share of the Company

Net Income Available to Common Stockholders Per Share of the Company

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands, except share and per share amounts)
Numerator:
Income from continuing operations	$	44,002		$	10,874
Income from continuing operations attributable to noncontrolling common units of the Operating Partnership	(815		)	(160		)
Preferred dividends	(3,313		)	(3,313		)
Allocation to participating securities (1)	(415		)	(427		)
Numerator for basic and diluted income from continuing operations available to common stockholders	39,459			6,974
Income from discontinued operations (2)	—			91,058
Income from discontinued operations attributable to noncontrolling common units of the Operating Partnership (2)	—			(1,927		)
Numerator for basic and diluted net income available to common stockholders	$	39,459		$	96,105
Denominator:
Basic weighted average vested shares outstanding	86,896,776			82,124,538
Effect of dilutive securities	537,590			2,015,532
Diluted weighted average vested shares and common share equivalents outstanding	87,434,366			84,140,070
Basic earnings per share:
Income from continuing operations available to common stockholders per share	$	0.45		$	0.08
Income from discontinued operations per common share (2)	0.00			1.09
Net income available to common stockholders per share	$	0.45		$	1.17
Diluted earnings per share:
Income from continuing operations available to common stockholders per share	$	0.45		$	0.08
Income from discontinued operations per common share (2)	0.00			1.06
Net income available to common stockholders per share	$	0.45		$	1.14

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

(2) The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

The impact of the contingently issuable shares were considered in our diluted earnings per share calculation for the three months ended March 31, 2015 and 2014, because we reported income from continuing operations attributable to common stockholders in the respective periods and the effect was dilutive. As of March 31, 2015 contingently issuable shares consist of stock options and 182,610 market measure-based RSUs. As of March 31, 2014 contingently issuable shares consist of stock options and the impact of the Company's 4.25% Exchangeable Notes due November 2014 (the "4.25% Exchangeable Notes") prior to their maturity and settlement in November 2014. As of March 31, 2014 the 182,610 market measure-based RSUs were not included in dilutive securities since they were considered contingently issuable shares as not all the necessary performance conditions had been met. The 2015 Performance-Based RSUs and our other nonvested market measure-based RSUs are not included in dilutive securities as of March 31, 2015 and 2014 because they are not included until all the necessary performance conditions have been met.

See Note 10 “Share-Based Compensation” for additional information regarding the stock options and other share-based compensation.

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Secured and Unsecured Debt of the Operating Partnership Capitalized Interest and Loan Fees (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Capitalized Interest and Loan Fees [Line Items]
Interest Expense	$ 16,878	$ 17,252
Kilroy Realty, L.P. [Member]
Capitalized Interest and Loan Fees [Line Items]
Gross interest expense	27,749	28,034
Capitalized interest	(10,871)	(10,782)
Interest Expense	$ 16,878	$ 17,252

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Organization and Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2015
Kilroy Realty Finance, Inc. [Member]
Real Estate Properties [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	1.00%
Properties Held for Sale [Member]
Real Estate Properties [Line Items]
Number of buildings	10
Rentable square feet	1,044,844
Development Properties [Member]
Real Estate Properties [Line Items]
Number of buildings	6	[1]
Rentable square feet	1,732,000	[1]
Office Properties [Member]
Real Estate Properties [Line Items]
Number of buildings	101
Rentable square feet	13,047,720
Number of Tenants	515
Percentage Occupied	96.10%
WASHINGTON
Real Estate Properties [Line Items]
Number of buildings	12
San Diego Portfolio [Member]
Real Estate Properties [Line Items]
Number of buildings	9	[2]
Rentable square feet	922,741	[2]
Redmond, WA Operating Property [Member] [Member]
Real Estate Properties [Line Items]
Number of buildings	1
Rentable square feet	122,103

[1] Estimated rentable square feet upon completion.

[2] The San Diego Properties include the following: 6260 Sequence Drive, 6290 Sequence Drive, 6310 Sequence Drive, 6340 Sequence Drive, 6350 Sequence Drive, 10770 Wateridge Circle, 4921 Directors Place, 6200 Greenwich Drive, and 6220 Greenwich Drive. The properties are being sold in two tranches. The Company completed the sale of the first tranche for gross proceeds of approximately $95.0 million on April 15, 2015.

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Subsequent Events

3 Months Ended

Mar. 31, 2015

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On April 15, 2015, aggregate dividends, distributions and dividend equivalents of $31.9 million were paid to common stockholders and common unitholders of record on March 31, 2015 and RSU holders of record on the payment date.

At March 31, 2015, the Company had a portfolio of nine properties located in San Diego, California that were classified as held for sale. The properties are being sold in two tranches. The Company completed the sale of the first tranche for gross proceeds of $95.0 million on April 15, 2015 (see Note 3).

At March 31, 2015, the Company had an office property located in Redmond, Washington that was classified as held for sale. On April 28, 2015, the Company completed the sale of this property for gross proceeds of $51.2 million (see Note 3).

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Organization and Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Consolidation Policy

The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, the Finance Partnership, KSLLC, Redwood LLC and all of our wholly owned and controlled subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, the Finance Partnership, KSLLC, Redwood LLC and all wholly-owned and controlled subsidiaries of the Operating Partnership. All intercompany balances and transactions have been eliminated in the consolidated financial statements.

Basis of Accounting

The accompanying interim financial statements have been prepared by management in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in conjunction with the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the interim financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements reflect all adjustments of a normal and recurring nature that are considered necessary for a fair presentation of the results for the interim periods presented. However, the results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2015. The interim financial statements for the Company and the Operating Partnership should be read in conjunction with the audited consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014.

Certain amounts in the consolidated statements of operations for prior periods have been reclassified to reflect the activity of discontinued operations disposed of prior to the Company's adoption of Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2014-08 (“ASU 2014-08”). Properties classified as held for sale and/or disposed of prior to January 1, 2015 are presented as discontinued operations for all periods presented.

Partially Owned Entities and Variable Interest Entities

At March 31, 2015, the consolidated financial statements of the Company and the Operating Partnership included two variable interest entities (“VIEs”), in which we were deemed to be the primary beneficiary. One VIE, Redwood LLC, was established in the second quarter of 2013 in connection with an undeveloped land acquisition. The other VIE was established during the first quarter of 2015 to facilitate potential future Section 1031 Exchanges to defer taxable gains on dispositions for federal and state income tax purposes. The impact of consolidating the VIEs increased the Company’s total assets, liabilities and noncontrolling interests by approximately $173.0 million (of which $171.1 million related to real estate held for investment on our consolidated balance sheet), approximately $16.5 million and approximately $5.9 million, respectively, as of March 31, 2015.

As of December 31, 2014, the consolidated financial statements of the Company and the Operating Partnership included two VIEs, in which we were deemed to be the primary beneficiary. One of the VIEs was Redwood LLC and the remaining VIE was established during the fourth quarter of 2014 to facilitate potential Section 1031 Exchanges. During the three months ended March 31, 2015, the Section 1031 Exchange was successfully completed and the VIE was terminated. As a result, $59.2 million of our restricted cash balance at December 31, 2014, which related to prior period disposition proceeds that were set aside to facilitate the Section 1031 Exchange, was released from escrow. The impact of consolidating the VIEs increased the Company’s total assets, liabilities and noncontrolling interests by approximately $219.6 million (of which $211.8 million related to real estate held for investment on our consolidated balance sheet), approximately $23.4 million and approximately 5.9 million, respectively, as of December 31, 2014.

Recent Accounting Pronouncements

Recently Issued Accounting Pronouncements

On April 7, 2015 the FASB issued ASU No. 2015-03 (“ASU 2015-03”) to amend the accounting guidance for the presentation of debt issuance costs. The standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. ASU 2015-03 is effective for public business entities for fiscal years beginning after December 15, 2015 and retrospective application is required. Early adoption of the guidance is permitted. The Company expects to adopt the guidance effective January 1, 2016 and the guidance is not anticipated to have a material impact on our consolidated financial statements or notes to our consolidated financial statements.

On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however if the proposed deferral is approved, adoption is required for annual reporting periods beginning after December 15, 2017. The Company is currently assessing the impact of the guidance on our consolidated financial statements or notes to our consolidated financial statements.

On February 18, 2015 the FASB issued ASU No. 2015-02 (“ASU 2015-02”) to amend the accounting guidance for consolidation. The standard simplifies the current guidance for consolidation and reduces the number of consolidation models through the elimination of the indefinite deferral of Statement 167. Additionally, the standard places more emphasis on risk of loss when determining a controlling financial interest. ASU 2015-02 is effective for all entities for reporting periods (including interim periods) beginning after December 15, 2015, and early adoption is permitted. The Company expects to adopt the guidance effective January 1, 2016 and the guidance is not anticipated to have a material impact on our consolidated financial statements or notes to our consolidated financial statements.

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Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest - capitalized interest amount	$ 10,669	$ 10,042

XML

Organization and Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of real estate properties

As of March 31, 2015, the following properties were excluded from our stabilized portfolio:

	Number of Properties/Projects	Estimated Rentable Square Feet
Properties held for sale (1)	10	1,044,844
Development projects under construction (2)	6	1,732,000

_______________

(1) Includes one property located in Redmond, Washington and nineproperties located in the Sorrento Mesa/UTC submarkets of San Diego, California. For additional information see Note 3.

(2) Estimated rentable square feet upon completion.

Our stabilized portfolio of operating properties was comprised of the following office properties at March 31, 2015:

	Number of Buildings	Rentable Square Feet	Number of Tenants	Percentage  Occupied
Stabilized Office Properties	101	13,047,720	515	96.1	%

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Share-Based Compensation Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Payment Award, Restricted Stock Units, Valuation Assumptions

The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing model:

	Fair Value Assumptions
Fair value per share at January 27, 2015	$78.55
Expected share price volatility	20.00%
Risk-free interest rate	0.92%
Remaining expected life	2.9 years

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Unsecured Senior Notes (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Debt Instrument [Line Items]
Unsecured debt	$ 1,783,280,000				$ 1,783,121,000
Kilroy Realty, L.P. [Member]
Debt Instrument [Line Items]
Unsecured debt	1,783,280,000				1,783,121,000
Kilroy Realty, L.P. [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.25%
Debt Instrument, Contingent Additional Borrowings	311,000,000
Kilroy Realty, L.P. [Member] | Four Point Two Five Zero Percent Unsecured Senior Notes [Member] [Domain] | Senior Notes [Member]
Debt Instrument [Line Items]
Stated coupon rate	4.25%
Effective interest rate	4.35%	[1],[2]
Debt Instrument, Face Amount	400,000,000				400,000,000
Debt Instrument, Unamortized Discount	(4,273,000)				(4,348,000)
Unsecured debt	395,727,000				395,652,000
Kilroy Realty, L.P. [Member] | 3.800% Unsecured Senior Note [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Stated coupon rate	3.80%
Effective interest rate	3.804%	[1],[3]
Debt Instrument, Face Amount	300,000,000				300,000,000
Debt Instrument, Unamortized Discount	(77,000)				(79,000)
Unsecured debt	299,923,000				299,921,000
Kilroy Realty, L.P. [Member] | 4.800% Unsecured Senior Notes Due July Fifteen Two Thousand Eighteen [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Stated coupon rate	4.80%
Effective interest rate	4.827%	[1],[3]
Debt Instrument, Face Amount	325,000,000				325,000,000
Debt Instrument, Unamortized Discount	(246,000)				(265,000)
Unsecured debt	324,754,000				324,735,000
Kilroy Realty, L.P. [Member] | 6.625% Unsecured Senior Notes due June 1 2020 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Stated coupon rate	6.625%
Effective interest rate	6.743%	[1],[4]
Debt Instrument, Face Amount	250,000,000				250,000,000
Debt Instrument, Unamortized Discount	(1,101,000)				(1,154,000)
Unsecured debt	248,899,000				248,846,000
Kilroy Realty, L.P. [Member] | 5.000% Unsecured Senior Notes due Nov3 2015 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Stated coupon rate	5.00%
Effective interest rate	5.014%	[1],[5]
Debt Instrument, Face Amount	325,000,000				325,000,000
Debt Instrument, Unamortized Discount	(23,000)				(33,000)
Unsecured debt	324,977,000				324,967,000
Kilroy Realty, L.P. [Member] | Term Loan Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Unsecured debt	$ 150,000,000				$ 150,000,000
Debt Instrument, Basis Spread on Variable Rate			1.56%	[6]

[1] This represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of initial issuance discounts, excluding debt issuance costs.

[2] Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year.

[3] Interest on these notes is payable semi-annually in arrears on January 15th and July 15th of each year.

[4] Interest on these notes is payable semi-annually in arrears on June 1st and December 1st of each year.

[5] Interest on these notes is payable semi-annually in arrears on May 3rd and November 3rd of each year.

[6] Our unsecured term loan facility interest rate was calculated based on an annual rate of LIBOR plus 1.40%.

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Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
REAL ESTATE ASSETS:
Land and improvements	$ 838,927		$ 877,633
Buildings and improvements	3,880,883		4,059,639
Undeveloped land and construction in progress (Note 2)	1,265,659		1,120,660
Total real estate assets held for investment	5,985,469		6,057,932
Accumulated depreciation and amortization	(921,279)		(947,664)
Total real estate assets held for investment, net ($171,120 and $211,755 of VIE, respectively, Note 1)	5,064,190		5,110,268
REAL ESTATE ASSETS AND OTHER ASSETS HELD FOR SALE, NET (Note 3)	190,751		8,211
CASH AND CASH EQUIVALENTS	50,181		23,781
RESTRICTED CASH (Note 1)	8,287		75,185
MARKETABLE SECURITIES (Note 12)	13,337		11,971
CURRENT RECEIVABLES, NET (Note 5)	8,122	[1]	7,229	[1]
DEFERRED RENT RECEIVABLES, NET (Note 5)	168,581	[2]	156,416
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Note 4)	182,251		201,926
DEFERRED FINANCING COSTS, NET	17,346		18,374
PREPAID EXPENSES AND OTHER ASSETS, NET	22,434		20,375
TOTAL ASSETS	5,725,480		5,633,736
LIABILITIES:
Secured debt (Notes 6 and 12)	516,725	[3]	546,292	[3]
Unsecured debt, net (Notes 6 and 12)	1,783,280		1,783,121
Unsecured line of credit (Notes 6 and 12)	130,000		140,000
Accounts payable, accrued expenses and other liabilities	217,352		225,830
Accrued distributions (Note 15)	33,532		32,899
Deferred revenue and acquisition-related intangible liabilities, net (Note 4)	128,730		132,239
Rents received in advance and tenant security deposits	46,887		49,363
Liabilities of real estate assets held for sale (Note 3)	9,768		56
Total liabilities	2,866,274		2,909,800
COMMITMENTS AND CONTINGENCIES (Note 11)
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Common stock, $.01 par value, 150,000,000 shares authorized, 88,031,377 and 86,259,684 shares issued and outstanding, respectively	880		863
Additional paid-in capital	2,761,176		2,635,900
Distributions in excess of earnings	(154,355)		(162,964)
Total stockholders’ equity	2,800,112		2,666,210
Noncontrolling interest :
Common units of the Operating Partnership (Note 7)	53,232		51,864
Noncontrolling interest in consolidated subsidiary (Note 1)	5,862		5,862
Total noncontrolling interests	59,094		57,726
Total equity	2,859,206		2,723,936
TOTAL LIABILITIES AND EQUITY	5,725,480		5,633,736
Series G Cumulative Redeemable Preferred Stock
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Cumulative Redeemable Preferred stock	96,155		96,155
Series H Cumulative Redeemable Preferred Stock
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Cumulative Redeemable Preferred stock	$ 96,256		$ 96,256

[1] Excludes current receivables, net related to properties held for sale.

[2] Excludes deferred rent receivables, net related to properties held for sale as of March 31, 2015.

[3] Amounts reported include the amounts of unamortized debt premiums of $9.2 million and $10.3 million as of March 31, 2015 and December 31, 2014, respectively.

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Organization and Basis of Presentation (Details Textuals) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Lease-Up Properties, Maximum Stabilized Occupacy, Percentage	95.00%
Percentage of general partnership interest owned by the company in the Operating Partnership	98.00%	97.90%	98.00%
Percentage of Common limited partnership interest owned by certain non-affiliated investors and certain directors and officers of the Company in the Operating Partnership	2.00%	2.10%	2.00%
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 173,000,000		$ 219,600,000
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	16,500,000		23,400,000
Noncontrolling Interest in Variable Interest Entity	5,862,000		5,862,000
Proceeds from Sale of Real Estate Held-for-investment	25,563,000	309,824,000
WASHINGTON
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of buildings	12
Kilroy Realty, L.P. [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Percentage of limited partnership interest owned by Operating Partnership	99.00%
Proceeds from Sale of Real Estate Held-for-investment	25,563,000	309,824,000
Kilroy Realty Finance, Inc. [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	1.00%
Real Estate Investment [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	171,100,000		211,800,000
Restricted cash [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Proceeds from Sale of Real Estate Held-for-investment			$ 59,200,000
Land [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Area of Land	106

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Consolidated Statements of Equity (Unaudited) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share	$ 0.35	$ 0.35

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Partners' Capital of the Operating Partnership (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
General Partners' Capital Account [Abstract]
Net proceeds from issuance of common stock	$ 113,097	$ 0
Noncontrolling Interest, Ownership Percentage by Parent	98.00%	97.90%	98.00%
Common units held by limited partners	1,793,170	1,804,200	1,804,200
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	2.00%	2.10%	2.00%
Kilroy Realty, L.P. [Member] | Capital Units [Member]
General Partners' Capital Account [Abstract]
General Partners' Capital Account, Units Outstanding	88,031,377	82,218,332	86,259,684

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Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net (Tables)

3 Months Ended

Mar. 31, 2015

Intangible Assets and Liabilities Disclosure [Abstract]

Summary of identified deferred leasing costs and acquisition-related intangible assets and liabilities

The following table summarizes our deferred leasing costs and acquisition-related intangible assets (acquired value of leasing costs, above-market operating leases, in-place leases and below-market ground lease obligation) and intangible liabilities (acquired value of below-market operating leases and above-market ground lease obligation) as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Deferred Leasing Costs and Acquisition-Related Intangible Assets, net: (1)
Deferred leasing costs	$	201,548		$	216,102
Accumulated amortization	(74,864		)	(74,904		)
Deferred leasing costs, net	126,684			141,198
Above-market operating leases	19,194			20,734
Accumulated amortization	(13,323		)	(13,952		)
Above-market operating leases, net	5,871			6,782
In-place leases	93,222			97,250
Accumulated amortization	(43,993		)	(43,773		)
In-place leases, net	49,229			53,477
Below-market ground lease obligation	490			490
Accumulated amortization	(23		)	(21		)
Below-market ground lease obligation, net	467			469
Total deferred leasing costs and acquisition-related intangible assets, net	$	182,251		$	201,926
Acquisition-Related Intangible Liabilities, net: (1) (2)
Below-market operating leases	$	64,792		$	68,051
Accumulated amortization	(30,222		)	(30,620		)
Below-market operating leases, net	34,570			37,431
Above-market ground lease obligation	6,320			6,320
Accumulated amortization	(349		)	(324		)
Above-market ground lease obligation, net	5,971			5,996
Total acquisition-related intangible liabilities, net	$	40,541		$	43,427

_______________

(1) Excludes deferred leasing costs and acquisition-related intangible assets and liabilities related to properties held for sale at March 31, 2015.

(2) Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

Schedule Of Finite Lived Intangible Assets and Liabilities Amortization Expense

The following table sets forth amortization related to deferred leasing costs and acquisition-related intangibles, including amounts attributable to discontinued operations, for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands)
Deferred leasing costs (1)	$	6,822		$	6,780
Above-market operating leases (2)	911			1,490
In-place leases (1)	4,221			6,136
Below-market ground lease obligation (3)	2			—
Below-market operating leases (4)	(2,839		)	(3,093		)
Above-market ground lease obligation (5)	(25		)	(25		)
Total	$	9,092		$	11,288

_______________

(1) The amortization of deferred leasing costs related to lease incentives is recorded to rental income and other deferred leasing costs and in-place leases is recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.

(2) The amortization of above-market operating leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.

(3) The amortization of the below-market ground lease obligation is recorded as an increase to ground lease expense in the consolidated statements of operations for the periods presented.

(4) The amortization of below-market operating leases is recorded as an increase to rental income in the consolidated statements of operations for the periods presented.

(5) The amortization of the above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

Schedule of Finite Lived Intangible Assets And Liabilities Future Amortization Expense

The following table sets forth the estimated annual amortization expense related to deferred leasing costs and acquisition-related intangibles as of March 31, 2015 for future periods:

Year	Deferred Leasing Costs		Above-Market Operating Leases (1)		In-Place Leases		Below-Market Ground Lease Obligation (2)		Below-Market Operating Leases (3)			Above-Market Ground Lease Obligation (4)
	(in thousands)
Remaining 2015	$	19,561	$	1,619	$	9,829	$	6	$	(7,239	)	$	(76	)
2016	23,763		1,503		10,741		8		(8,189		)	(101		)
2017	20,881		1,241		9,281		8		(7,337		)	(101		)
2018	17,275		831		6,373		8		(5,735		)	(101		)
2019	13,440		643		4,714		8		(3,597		)	(101		)
Thereafter	31,764		34		8,291		429		(2,473		)	(5,491		)
Total	$	126,684	$	5,871	$	49,229	$	467	$	(34,570	)	$	(5,971	)

_______________

(1) Represents estimated annual amortization related to above-market operating leases. Amounts will be recorded as a decrease to rental income in the consolidated statements of operations.

(2) Represents estimated annual amortization related to below-market ground lease obligations. Amounts will be recorded as an increase to ground lease expense in the consolidated statements of operations.

(3) Represents estimated annual amortization related to below-market operating leases. Amounts will be recorded as an increase to rental income in the consolidated statements of operations.

(4) Represents estimated annual amortization related to above-market ground lease obligations. Amounts will be recorded as a decrease to ground lease expense in the consolidated statements of operations.

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Net Income Available to Common Unitholders Per Unit of the Operating Partnership (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Numerator:
Income from continuing operations	$ 44,002		$ 10,874
Preferred distributions	(3,313)		(3,313)
Allocation to participating securities	(415)	[1]	(427)	[1]
Numerator for basic and diluted income from continuing operations available to common unitholders	39,459		6,974
Income from discontinued operations	0	[2]	91,058	[2]
Numerator for basic and diluted net income available to common unitholders	39,459		96,105
Denominator:
Weighted average common units outstanding - basic (Note 14)	86,896,776		82,124,538
Effect of dilutive securities	537,590		2,015,532
Weighted average common units outstanding - diluted (Note 14)	87,434,366		84,140,070
Basic earnings per unit:
Income (loss) from continuing operations available to common unitholders per unit - basic (Note 15)	$ 0.45		$ 0.08
Income from discontinued operations per common unit	$ 0.00	[2]	$ 1.09	[2]
Net income available to common unitholders per unit-basic (Note 14)	$ 0.45		$ 1.17
Diluted earnings per unit:
Income (loss) from continuing operations available to common unitholders per unit - diluted (Note 15)	$ 0.45		$ 0.08
Income from discontinued operations per common unit	$ 0.00	[2]	$ 1.06	[2]
Net income available to common unitholders per unit-diluted (Note 14)	$ 0.45		$ 1.14
Kilroy Realty, L.P. [Member]
Numerator:
Income from continuing operations	44,002		10,874
Income from continuing operations attributable to noncontrolling interests in consolidated subsidiaries	(75)		(65)
Preferred distributions	(3,313)		(3,313)
Allocation to participating securities	(415)	[1]	(427)	[1]
Numerator for basic and diluted income from continuing operations available to common unitholders	40,199		7,069
Income from discontinued operations	0	[2]	91,058	[2]
Numerator for basic and diluted net income available to common unitholders	$ 40,199		$ 98,127
Denominator:
Weighted average common units outstanding - basic (Note 14)	88,693,306		83,928,993
Effect of dilutive securities	537,590		2,015,532
Weighted average common units outstanding - diluted (Note 14)	89,230,896		85,944,525
Basic earnings per unit:
Income (loss) from continuing operations available to common unitholders per unit - basic (Note 15)	$ 0.45		$ 0.08
Income from discontinued operations per common unit	$ 0.00	[2]	$ 1.09	[2]
Net income available to common unitholders per unit-basic (Note 14)	$ 0.45		$ 1.17
Diluted earnings per unit:
Income (loss) from continuing operations available to common unitholders per unit - diluted (Note 15)	$ 0.45		$ 0.08
Income from discontinued operations per common unit	$ 0.00	[2]	$ 1.06	[2]
Net income available to common unitholders per unit-diluted (Note 14)	$ 0.45		$ 1.14

[1] Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

[2] The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

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Noncontrolling Interests on the Company's Consolidated Financial Statements

3 Months Ended

Mar. 31, 2015

Noncontrolling Interest [Abstract]

Noncontrolling Interests on the Company's Consolidated Financial Statements

Noncontrolling Interests on the Company’s Consolidated Financial Statements

Common Units of the Operating Partnership

The Company owned an approximate 98.0%, 98.0% and 97.9% common general partnership interest in the Operating Partnership as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively. The remaining approximate 2.0%, 2.0% and 2.1% common limited partnership interest as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively, was owned by non-affiliate investors and certain of our executive officers and directors in the form of noncontrolling common units. There were 1,793,170, 1,804,200 and 1,804,200 common units outstanding held by these investors, executive officers and directors as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively.

The noncontrolling common units may be redeemed by unitholders for cash. Except under certain circumstances, we, at our option, may satisfy the cash redemption obligation with shares of the Company’s common stock on a one-for-one basis. If satisfied in cash, the value for each noncontrolling common unit upon redemption is the amount equal to the average of the closing quoted price per share of the Company’s common stock, par value $.01 per share, as reported on the NYSE for the ten trading days immediately preceding the applicable redemption date. The aggregate value upon redemption of the then-outstanding noncontrolling common units was $137.9 millionand $126.8 million as of March 31, 2015 and December 31, 2014, respectively. This redemption value does not necessarily represent the amount that would be distributed with respect to each noncontrolling common unit in the event of our termination or liquidation. In the event of our termination or liquidation, it is expected in most cases that each common unit would be entitled to a liquidating distribution equal to the liquidating distribution payable in respect of each share of the Company’s common stock.

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Receivables (Tables)

3 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Current Receivables, net

Current receivables, net is primarily comprised of contractual rents and other lease-related obligations due from tenants. The balance consisted of the following as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Current receivables (1)	$	10,107		$	9,228
Allowance for uncollectible tenant receivables (1)	(1,985		)	(1,999		)
Current receivables, net (1)	$	8,122		$	7,229

Deferred Rent Receivables, net

Deferred rent receivables, net consisted of the following as of March 31, 2015 and December 31, 2014:

	March 31, 2015 (1)			December 31, 2014
	(in thousands)
Deferred rent receivables	$	170,736		$	158,405
Allowance for deferred rent receivables	(2,155		)	(1,989		)
Deferred rent receivables, net	$	168,581		$	156,416

______________

(1) Excludes deferred rent receivables, net related to properties held for sale as of March 31, 2015.

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Partners' Capital of the Operating Partnership

3 Months Ended

Mar. 31, 2015

Partners' Capital Notes [Abstract]

Common Units of the Operating Partnership

Partners’ Capital of the Operating Partnership

Common Units Outstanding

The following table sets forth the number of common units held by the Company and the number of common units held by non-affiliate 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:

	March 31, 2015		December 31, 2014		March 31, 2014
Company owned common units in the Operating Partnership	88,031,377		86,259,684		82,218,332
Company owned general partnership interest	98.0	%	98.0	%	97.9	%
Noncontrolling common units of the Operating Partnership	1,793,170		1,804,200		1,804,200
Ownership interest of noncontrolling interest	2.0	%	2.0	%	2.1	%

For a further discussion of the noncontrolling common units as of March 31, 2015 and December 31, 2014, refer to Note 7.

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Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 44,002	$ 101,932
Adjustments to reconcile net income to net cash provided by operating activities (including discontinued operations):
Depreciation and amortization of building and improvements and leasing costs	50,843	48,717
Increase in provision for bad debts	242	0
Depreciation of furniture, fixtures and equipment	644	485
Noncash amortization of share-based compensation awards	3,571	2,502
Noncash amortization of deferred financing costs and debt discounts and premiums	454	1,256
Noncash amortization of net below market rents (Note 4)	(1,928)	(1,734)
Gains on dispositions of discontinued operations	0	(90,115)
Gain on sale of land (Note 3)	(17,268)	0
Noncash amortization of deferred revenue related to tenant-funded tenant improvements	(3,013)	(2,353)
Straight-line rents	(19,692)	(3,959)
Net change in other operating assets	(8,421)	(5,949)
Net change in other operating liabilities	5,545	(5,701)
Net cash provided by operating activities	54,979	45,081
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for acquisition of operating properties	0	(106,125)
Expenditures for operating properties	(24,345)	(32,016)
Expenditures for development and redevelopment properties and undeveloped land	(89,810)	(73,626)
Expenditures for acquisition of development properties (Note 2)	(50,435)	0
Net proceeds received from land and operating properties (Note 3)	25,563	309,824
Decrease (increase) in acquisition-related deposits	3,099	0
Decrease (increase) in restricted cash (Note 1)	58,619	(779)
Net cash (used in) provided by investing activities	(77,309)	97,278
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock (Note 8)	113,097	0
Borrowings on unsecured line of credit	150,000	90,000
Repayments on unsecured line of credit	(160,000)	(135,000)
Principal payments on secured debt	(28,472)	(2,414)
Financing costs	(397)	(418)
Repurchase of common stock and restricted stock units	(1,821)	(1,517)
Proceeds from exercise of stock options (Note 10)	10,482	21
Dividends and distributions paid to common stockholders and common unitholders	(30,846)	(29,561)
Dividends and distributions paid to preferred stockholders and preferred unitholders	(3,313)	(3,313)
Net cash provided by (used in) financing activities	48,730	(82,202)
Net increase in cash and cash equivalents	26,400	60,157
Cash and cash equivalents, beginning of period	23,781	35,377
Cash and cash equivalents, end of period	50,181	95,534
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $10,669 and $10,042 as of March 31, 2015 and 2014, respectively	19,814	14,106
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	85,656	64,709
Tenant improvements funded directly by tenants	231	4,470
Assumption of other liabilities in connection with development acquisitions	1,478	0
Release of holdback funds to third party	8,279	0
NONCASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders	31,892	29,906
Accrual of dividends and distributions payable to preferred stockholders and preferred unitholders	1,656	1,656
Fair value of share-based compensation awards at equity classification date (Note 10)	16,920	0
Exchange of common units of the Operating Partnership into shares of the Company’s common stock	$ 316	$ 28

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Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Carrying amounts of consolidated VIE	$ 171,120,000	$ 211,755,000
Common stock, par value	$ 0.01
Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	88,031,377	86,259,684
Common stock, shares outstanding	88,031,377	86,259,684
Preferred Stock [Member]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	30,000,000	30,000,000
Series G Cumulative Redeemable Preferred Stock
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock dividend rate percentage	6.875%	6.875%
Preferred stock, shares authorized	4,600,000	4,600,000
Preferred stock, shares issued	4,000,000	4,000,000
Preferred stock, shares outstanding	4,000,000	4,000,000
Preferred Stock Liquidation preference	100,000,000	100,000,000
Series H Cumulative Redeemable Preferred Stock
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock dividend rate percentage	6.375%	6.375%
Preferred stock, shares authorized	4,000,000	4,000,000
Preferred stock, shares issued	4,000,000	4,000,000
Preferred stock, shares outstanding	4,000,000	4,000,000
Preferred Stock Liquidation preference	$ 100,000,000	$ 100,000,000

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Acquisitions

3 Months Ended

Mar. 31, 2015

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

Acquisitions

Development Project Acquisitions

During the threemonths ended March 31, 2015, we acquired the development opportunity listed below from an unrelated third party. The acquisition was funded with proceeds from the Company’s at-the-market stock offering program (see Note 8) and prior year disposition proceeds.

Project	Date of Acquisition	Type	Purchase Price (in millions)
333 Dexter (1)(2)	February 13, 2015	Land	$	49.5

_______________

(1) Acquisition comprised of four adjacent parcels in the South Lake Union submarket of Seattle, Washington located at 330 Dexter Avenue North, 333 Dexter Avenue North, 401 Dexter Avenue North, and 400 Aurora Avenue North.

(2) In connection with this acquisition, we also assumed $2.4 million in accrued liabilities and acquisition costs which are not included in the purchase price above. As of March 31, 2015, the underlying assets were included as undeveloped land and construction in progress in our consolidated balance sheets.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 24, 2015
Entity Registrant Name	KILROY REALTY CORP
Entity Central Index Key	0001025996
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		88,052,069
Kilroy Realty, L.P. [Member]
Entity Registrant Name	Kilroy Realty, L.P.
Entity Central Index Key	0001493976
Current Fiscal Year End Date	--03-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	false

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Real Estate Assets Held for Sale and Dispositions

3 Months Ended

Mar. 31, 2015

Discontinued Operations and Disposal Groups [Abstract]

Real Estate Assets Held for Sale and Dispositions

Real Estate Assets Held for Sale

As ofMarch 31, 2015, the following operating properties were classified as held for sale:

Location	City/Submarket	Property Type	Number of Buildings	Rentable Square Feet
15050 NE 36th Street	Redmond, WA	Office	1	122,103
San Diego Properties (1)	Sorrento Mesa, CA	Office	9	922,741
Total properties held for sale			10	1,044,844

________________________ 

(1) The San Diego Properties include the following: 6260 Sequence Drive, 6290 Sequence Drive, 6310 Sequence Drive, 6340 Sequence Drive, 6350 Sequence Drive, 10770 Wateridge Circle, 4921 Directors Place, 6200 Greenwich Drive, and 6220 Greenwich Drive. The properties are being sold in two tranches. The Company completed the sale of the first tranche for gross proceeds of approximately $95.0 million on April 15, 2015.

The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, the ten properties held for sale at March 31, 2015 are included in continuing operations for all periods presented.

The major classes of assets and liabilities of the properties held for sale as of March 31, 2015 were as follows:

Real estate assets and other assets held for sale	(in thousands)
Land and improvements	$	38,706
Buildings and improvements	198,125
Total real estate held for sale	236,831
Accumulated depreciation and amortization	(66,421		)
Total real estate held for sale, net	170,410
Current receivables, net	185
Deferred rent receivables, net	7,285
Deferred leasing costs and acquisition-related intangible assets, net	12,364
Prepaid expenses and other assets, net	507
Real estate and other assets held for sale, net	$	190,751
Liabilities and deferred revenue of real estate assets held for sale
Accounts payable, accrued expenses and other liabilities	$	7,376
Deferred revenue and acquisition-related intangible liabilities, net	1,367
Rents received in advance and tenant security deposits	1,025
Liabilities and deferred revenue of real estate assets held for sale	$	9,768

Land Disposition

During the threemonths ended March 31, 2015, the Company sold a land parcel located at 17150 Von Karman in Irvine, California for a gross sales price of $26.0 million, resulting in a gain on sale of $17.3 million.

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Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
REVENUES:
Rental income	$ 130,932		$ 110,098
Tenant reimbursements	14,425		11,519
Other property income	725		2,141
Total revenues	146,082		123,758
EXPENSES
Property expenses	24,714		24,483
Real estate taxes	12,715		10,989
Provision for bad debts	242		0
Ground leases	776		762
General and administrative expenses	12,768		10,811
Acquisition-related expenses	128		228
Depreciation and amortization	51,487		48,536
Total expenses	102,830		95,809
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (Note 12)	360		177
Interest expense (Note 6)	(16,878)		(17,252)
Total other (expenses) income	(16,518)		(17,075)
INCOME FROM CONTINUING OPERATIONS BEFORE GAINS ON SALE OF REAL ESTATE	26,734		10,874
Gain on sale of land (Note 3)	17,268		0
INCOME FROM CONTINUING OPERATIONS	44,002		10,874
DISCONTINUED OPERATIONS (Note 1)
Income from discontinued operations	0		943
Gains on dispositions of discontinued operations	0		90,115
Total income from discontinued operations	0	[1]	91,058	[1]
NET INCOME	44,002		101,932
Net income attributable to noncontrolling common units of the Operating Partnership	(815)		(2,087)
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION	43,187		99,845
PREFERRED DIVIDENDS	(3,313)		(3,313)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 39,874		$ 96,532
Income (loss) from continuing operations available to common stockholders per common share – basic (Note 14)	$ 0.45		$ 0.08
Income from continuing operations available to common stockholders per common share – diluted (Note 13)	$ 0.45		$ 0.08
Net income available to common stockholders per share – basic (Note 13)	$ 0.45		$ 1.17
Net income available to common stockholders per share – diluted (Note 13)	$ 0.45		$ 1.14
Weighted average common shares outstanding – basic (Note 13)	86,896,776		82,124,538
Weighted average common shares outstanding – diluted (Note 13)	87,434,366		84,140,070
Dividends declared per common share	$ 0.35		$ 0.35

[1] The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

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Consolidated Statements of Capital (KILROY REALTY, L.P.) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 44,002	$ 101,932	$ 101,932
Noncash amortization of share-based compensation	4,302	2,233
Settlement of restricted stock units for shares of common stock	0	0
Preferred distributions	(3,313)	(3,313)
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	815		2,087
Kilroy Realty, L.P. [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,723,936	2,516,160
Net income	44,002	101,932
Issuance of common units (Note 9)	113,097
Issuance of share-based compensation awards	413
Noncash amortization of share-based compensation	4,302	2,233
Repurchase of common units and restricted stock units	(1,821)	(1,517)
Settlement of restricted stock units for shares of common stock	0	0
Exercise of stock options (Note 10)	10,482	21
Preferred distributions	(3,313)	(3,313)
Distributions declared per common unit ($0.35 per unit)	(31,892)	(29,906)
Ending Balance	2,859,206	2,585,610
Kilroy Realty, L.P. [Member] | Total Partners Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,714,311	2,507,772
Net income	43,927	101,867
Issuance of common units (Note 9)	113,097
Issuance of share-based compensation awards	413
Noncash amortization of share-based compensation	4,302	2,233
Repurchase of common units and restricted stock units	(1,821)	(1,517)
Settlement of restricted stock units for shares of common stock	0	0
Exercise of stock options (Note 10)	10,482	21
Preferred distributions	(3,313)	(3,313)
Distributions declared per common unit ($0.35 per unit)	(31,892)	(29,906)
Ending Balance	2,849,506	2,577,157
Kilroy Realty, L.P. [Member] | Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	9,625	8,388
Net income	75	65
Ending Balance	9,700	8,453
Kilroy Realty, L.P. [Member] | Partners Capital Preferred Units [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance				192,411
Ending Balance	192,411	192,411	192,411	192,411
Kilroy Realty, L.P. [Member] | Partners Capital Common Unit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,521,900	2,315,361
Beginning Balance units	88,063,884	83,959,144
Net income	43,927	101,867
Issuance of common units, units (Note 9)	1,507,393
Issuance of common units (Note 9)	113,097
Issuance of share-based compensation awards	413
Noncash amortization of share-based compensation	4,302	2,233
Repurchase of common units and restricted stock units, units	(20,429)	(26,074)
Repurchase of common units and restricted stock units	(1,821)	(1,517)
Settlement of restricted stock units, units	36,699	88,962
Settlement of restricted stock units for shares of common stock	0	0
Exercise of stock options (Note 10)	237,000	500
Exercise of stock options (Note 10)	10,482	21
Preferred distributions	(3,313)	(3,313)
Distributions declared per common unit ($0.35 per unit)	(31,892)	(29,906)
Ending Balance	$ 2,657,095	$ 2,384,746
Ending Balance units	89,824,547	84,022,532

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Consolidated Statements of Operations (KILROY REALTY, L.P.) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
REVENUES:
Rental income	$ 130,932		$ 110,098
Tenant reimbursements	14,425		11,519
Other property income	725		2,141
Total revenues	146,082		123,758
EXPENSES
Property expenses	24,714		24,483
Real estate taxes	12,715		10,989
Provision for bad debts	242		0
Ground leases	776		762
General and administrative expenses	12,768		10,811
Acquisition-related expenses	128		228
Depreciation and amortization	51,487		48,536
Total expenses	102,830		95,809
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (Note 12)	360		177
Interest expense (Note 6)	(16,878)		(17,252)
Total other (expenses) income	(16,518)		(17,075)
INCOME FROM CONTINUING OPERATIONS	44,002		10,874
DISCONTINUED OPERATIONS (Note 1)
Income from discontinued operations	0		943
Gains on dispositions of discontinued operations	0		90,115
Total income from discontinued operations	0	[1]	91,058	[1]
NET INCOME	44,002		101,932
NET INCOME ATTRIBUTABLE TO KILROY REALTY, L.P.	43,187		99,845
NET INCOME AVAILABLE TO COMMON UNITHOLDERS	39,874		96,532
Income (loss) from continuing operations available to common unitholders per unit - basic (Note 15)	$ 0.45		$ 0.08
Income (loss) from continuing operations available to common unitholders per unit - diluted (Note 15)	$ 0.45		$ 0.08
Net income available to common unitholders per unit-basic (Note 14)	$ 0.45		$ 1.17
Net income available to common unitholders per unit-diluted (Note 14)	$ 0.45		$ 1.14
Weighted average common units outstanding - basic (Note 14)	86,896,776		82,124,538
Weighted average common units outstanding - diluted (Note 14)	87,434,366		84,140,070
Kilroy Realty, L.P. [Member]
REVENUES:
Rental income	130,932		110,098
Tenant reimbursements	14,425		11,519
Other property income	725		2,141
Total revenues	146,082		123,758
EXPENSES
Property expenses	24,714		24,483
Real estate taxes	12,715		10,989
Provision for bad debts	242		0
Ground leases	776		762
General and administrative expenses	12,768		10,811
Acquisition-related expenses	128		228
Depreciation and amortization	51,487		48,536
Total expenses	102,830		95,809
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (Note 12)	360		177
Interest expense (Note 6)	(16,878)		(17,252)
Total other (expenses) income	(16,518)		(17,075)
INCOME FROM CONTINUING OPERATIONS BEFORE GAINS ON SALE OF REAL ESTATE	26,734		10,874
Gain on sale of land (Note 3)	17,268		0
INCOME FROM CONTINUING OPERATIONS	44,002		10,874
DISCONTINUED OPERATIONS (Note 1)
Income from discontinued operations	0		943
Gains on dispositions of discontinued operations	0		90,115
Total income from discontinued operations	0	[1]	91,058	[1]
NET INCOME	44,002		101,932
Net income attributable to noncontrolling interests in consolidated subsidiaries	(75)		(65)
NET INCOME ATTRIBUTABLE TO KILROY REALTY, L.P.	43,927		101,867
Preferred Distributions	(3,313)		(3,313)
NET INCOME AVAILABLE TO COMMON UNITHOLDERS	$ 40,614		$ 98,554
Income (loss) from continuing operations available to common unitholders per unit - basic (Note 15)	$ 0.45		$ 0.08
Income (loss) from continuing operations available to common unitholders per unit - diluted (Note 15)	$ 0.45		$ 0.08
Net income available to common unitholders per unit-basic (Note 14)	$ 0.45		$ 1.17
Net income available to common unitholders per unit-diluted (Note 14)	$ 0.45		$ 1.14
Weighted average common units outstanding - basic (Note 14)	88,693,306		83,928,993
Weighted average common units outstanding - diluted (Note 14)	89,230,896		85,944,525
Dividends declared per common unit	$ 0.35		$ 0.35

[1] The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

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Stockholders' Equity of the Company

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Stockholders' Equity of the Company

Stockholders’ Equity of the Company

At-The-Market Stock Offering Program

Under our current at-the-market stock offering program, which commenced in December 2014, we may offer and sell shares of our common stock having an aggregate gross sales price of up to $300.0 million from time to time in “at-the-market” offerings. Since commencement of the program through March 31, 2015, we have sold 1,648,893 shares of common stock having an aggregate gross sales price of $124.7 million. As of March 31, 2015, shares of common stock having an aggregate gross sales price of up to $175.3 million remain available to be sold under this program. Actual future sales will depend upon a variety of factors, including but not limited to market conditions, the trading price of the Company’s common stock and our capital needs. We have no obligation to sell the remaining shares available for sale under this program.

The following table sets forth information regarding sales of our common stock under our at-the-market offering program for the three months ended March 31, 2015:

	Three months  ended March 31, 2015
	(in millions, except share and per share data)
Shares of common stock sold during the three month period	1,507,393
Weighted average price per common share	$	76.09
Aggregate gross proceeds	$	114.7
Aggregate net proceeds after sales agent compensation	$	113.2

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Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net

3 Months Ended

Mar. 31, 2015

Intangible Assets and Liabilities Disclosure [Abstract]

deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net

    Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net

The following table summarizes our deferred leasing costs and acquisition-related intangible assets (acquired value of leasing costs, above-market operating leases, in-place leases and below-market ground lease obligation) and intangible liabilities (acquired value of below-market operating leases and above-market ground lease obligation) as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Deferred Leasing Costs and Acquisition-Related Intangible Assets, net: (1)
Deferred leasing costs	$	201,548		$	216,102
Accumulated amortization	(74,864		)	(74,904		)
Deferred leasing costs, net	126,684			141,198
Above-market operating leases	19,194			20,734
Accumulated amortization	(13,323		)	(13,952		)
Above-market operating leases, net	5,871			6,782
In-place leases	93,222			97,250
Accumulated amortization	(43,993		)	(43,773		)
In-place leases, net	49,229			53,477
Below-market ground lease obligation	490			490
Accumulated amortization	(23		)	(21		)
Below-market ground lease obligation, net	467			469
Total deferred leasing costs and acquisition-related intangible assets, net	$	182,251		$	201,926
Acquisition-Related Intangible Liabilities, net: (1) (2)
Below-market operating leases	$	64,792		$	68,051
Accumulated amortization	(30,222		)	(30,620		)
Below-market operating leases, net	34,570			37,431
Above-market ground lease obligation	6,320			6,320
Accumulated amortization	(349		)	(324		)
Above-market ground lease obligation, net	5,971			5,996
Total acquisition-related intangible liabilities, net	$	40,541		$	43,427

_______________

(1) Excludes deferred leasing costs and acquisition-related intangible assets and liabilities related to properties held for sale at March 31, 2015.

(2) Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

The following table sets forth amortization related to deferred leasing costs and acquisition-related intangibles, including amounts attributable to discontinued operations, for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
	(in thousands)
Deferred leasing costs (1)	$	6,822		$	6,780
Above-market operating leases (2)	911			1,490
In-place leases (1)	4,221			6,136
Below-market ground lease obligation (3)	2			—
Below-market operating leases (4)	(2,839		)	(3,093		)
Above-market ground lease obligation (5)	(25		)	(25		)
Total	$	9,092		$	11,288

_______________

(1) The amortization of deferred leasing costs related to lease incentives is recorded to rental income and other deferred leasing costs and in-place leases is recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.

(2) The amortization of above-market operating leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.

(3) The amortization of the below-market ground lease obligation is recorded as an increase to ground lease expense in the consolidated statements of operations for the periods presented.

(4) The amortization of below-market operating leases is recorded as an increase to rental income in the consolidated statements of operations for the periods presented.

(5) The amortization of the above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

The following table sets forth the estimated annual amortization expense related to deferred leasing costs and acquisition-related intangibles as of March 31, 2015 for future periods:

Year	Deferred Leasing Costs		Above-Market Operating Leases (1)		In-Place Leases		Below-Market Ground Lease Obligation (2)		Below-Market Operating Leases (3)			Above-Market Ground Lease Obligation (4)
	(in thousands)
Remaining 2015	$	19,561	$	1,619	$	9,829	$	6	$	(7,239	)	$	(76	)
2016	23,763		1,503		10,741		8		(8,189		)	(101		)
2017	20,881		1,241		9,281		8		(7,337		)	(101		)
2018	17,275		831		6,373		8		(5,735		)	(101		)
2019	13,440		643		4,714		8		(3,597		)	(101		)
Thereafter	31,764		34		8,291		429		(2,473		)	(5,491		)
Total	$	126,684	$	5,871	$	49,229	$	467	$	(34,570	)	$	(5,971	)

_______________

(1) Represents estimated annual amortization related to above-market operating leases. Amounts will be recorded as a decrease to rental income in the consolidated statements of operations.

(2) Represents estimated annual amortization related to below-market ground lease obligations. Amounts will be recorded as an increase to ground lease expense in the consolidated statements of operations.

(3) Represents estimated annual amortization related to below-market operating leases. Amounts will be recorded as an increase to rental income in the consolidated statements of operations.

(4) Represents estimated annual amortization related to above-market ground lease obligations. Amounts will be recorded as a decrease to ground lease expense in the consolidated statements of operations.

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Consolidated Statements of Cash Fiows (Kilroy Realty, L.P.) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash paid for interest - capitalized interest amount	$ 10,669	$ 10,042
Kilroy Realty, L.P. [Member]
Cash paid for interest - capitalized interest amount	$ 10,669	$ 10,042

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Share-Based Compensation (Details Textuals) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	212,468
Share Price			$ 75.34
Share-based Compensation Capitalized	$ 0.7	$ 0.4
Share-based Compensation, Unrecognized costs	42.5
Share-based Compensation, Unrecognized costs, weighted-average vesting period	2 years 6 months
Allocated Share-based Compensation Expense	4.3	2.9
Market Measure-Based Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 78.55
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	20.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.92%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	127,657
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	2 years 11 months
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Grants In Period, Grant Date Fair Value	10.1
Time-Based Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	84,811
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Grants In Period, Grant Date Fair Value	$ 6.4
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 42.61
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	765,000
Kilroy Realty 2006 Incentive Award Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	494,405
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Paid for Tax Withholding for Share Based Compensation	20,429	26,074
Exercise of stock options	(237,000)	(500)
Shareholder Meeting Date May 21, 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Requested	8,320,000

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Consolidated Statements of Capital (KILROY REALTY, L.P.) (Parenthetical) (Kilroy Realty, L.P. [Member], USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Kilroy Realty, L.P. [Member]
Distributions Per Limited Partnership and General Partnership Unit, Outstanding, Basic	$ 0.35	$ 0.35

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Consolidated Statements of Cash Flows (KILROY REALTY, L.P.) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 44,002	$ 101,932
Adjustments to reconcile net income to net cash provided by operating activities (including discontinued operations):
Depreciation and amortization of building and improvements and leasing costs	50,843	48,717
Increase in provision for bad debts	242	0
Depreciation of furniture, fixtures and equipment	644	485
Noncash amortization of share-based compensation awards	3,571	2,502
Noncash amortization of deferred financing costs and debt discounts and premiums	454	1,256
Noncash amortization of net below market rents (Note 4)	(1,928)	(1,734)
Gains on dispositions of discontinued operations	0	(90,115)
Gain on sale of land (Note 3)	(17,268)	0
Noncash amortization of deferred revenue related to tenant-funded tenant improvements	(3,013)	(2,353)
Straight-line rents	(19,692)	(3,959)
Net change in other operating assets	(8,421)	(5,949)
Net change in other operating liabilities	5,545	(5,701)
Net cash provided by operating activities	54,979	45,081
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for acquisition of operating properties	0	(106,125)
Expenditures for operating properties	(24,345)	(32,016)
Expenditures for development and redevelopment properties and undeveloped land	(89,810)	(73,626)
Expenditures for acquisition of development properties (Note 2)	(50,435)	0
Net proceeds received from land and operating properties (Note 3)	25,563	309,824
Decrease (increase) in acquisition-related deposits	3,099	0
Decrease (increase) in restricted cash (Note 1)	58,619	(779)
Net cash (used in) provided by investing activities	(77,309)	97,278
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on unsecured line of credit	150,000	90,000
Repayments on unsecured line of credit	(160,000)	(135,000)
Principal payments on secured debt	(28,472)	(2,414)
Financing costs	(397)	(418)
Repurchase of common stock and restricted stock units	(1,821)	(1,517)
Proceeds from exercise of stock options (Note 10)	10,482	21
Dividends and distributions paid to common stockholders and common unitholders	(30,846)	(29,561)
Dividends and Distributions paid to preferred stockholders and preferred unitholders	(3,313)	(3,313)
Net cash provided by financing activities	48,730	(82,202)
Net increase in cash and cash equivalents	26,400	60,157
Cash and cash equivalents, beginning of period	23,781	35,377
Cash and cash equivalents, end of period	50,181	95,534
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $10,669 and $10,042 as of March 31, 2015 and 2014, respectively	19,814	14,106
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	85,656	64,709
Tenant improvements funded directly by tenants	231	4,470
Assumption of other liabilities in connection with development acquisitions	1,478	0
Release of Holdback Funds to Third Party	8,279	0
NONCASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common unitholders	31,892	29,906
Accrual of dividends and distributions payable to preferred unitholders	1,656	1,656
Fair value of share-based compensation awards at equity classification date (Note 10)	16,920	0
Kilroy Realty, L.P. [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	44,002	101,932
Adjustments to reconcile net income to net cash provided by operating activities (including discontinued operations):
Depreciation and amortization of building and improvements and leasing costs	50,843	48,717
Increase in provision for bad debts	242	0
Depreciation of furniture, fixtures and equipment	644	485
Noncash amortization of share-based compensation awards	3,571	2,502
Noncash amortization of deferred financing costs and debt discounts and premiums	454	1,256
Noncash amortization of net below market rents (Note 4)	(1,928)	(1,734)
Gains on dispositions of discontinued operations	0	(90,115)
Gain on sale of land (Note 3)	(17,268)	0
Noncash amortization of deferred revenue related to tenant-funded tenant improvements	(3,013)	(2,353)
Straight-line rents	(19,692)	(3,959)
Net change in other operating assets	(8,421)	(5,949)
Net change in other operating liabilities	5,545	(5,701)
Net cash provided by operating activities	54,979	45,081
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for acquisition of operating properties	0	(106,125)
Expenditures for operating properties	(24,345)	(32,016)
Expenditures for development and redevelopment properties and undeveloped land	(89,810)	(73,626)
Expenditures for acquisition of development properties (Note 2)	(50,435)	0
Net proceeds received from land and operating properties (Note 3)	25,563	309,824
Decrease (increase) in acquisition-related deposits	3,099	0
Decrease (increase) in restricted cash (Note 1)	58,619	(779)
Net cash (used in) provided by investing activities	(77,309)	97,278
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock (Note 8)	113,097	0
Borrowings on unsecured line of credit	150,000	90,000
Repayments on unsecured line of credit	(160,000)	(135,000)
Principal payments on secured debt	(28,472)	(2,414)
Financing costs	(397)	(418)
Repurchase of common stock and restricted stock units	(1,821)	(1,517)
Proceeds from exercise of stock options (Note 10)	10,482	21
Dividends and distributions paid to common stockholders and common unitholders	(30,846)	(29,561)
Dividends and Distributions paid to preferred stockholders and preferred unitholders	(3,313)	(3,313)
Net cash provided by financing activities	48,730	(82,202)
Net increase in cash and cash equivalents	26,400	60,157
Cash and cash equivalents, beginning of period	23,781	35,377
Cash and cash equivalents, end of period	50,181	95,534
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $10,669 and $10,042 as of March 31, 2015 and 2014, respectively	19,814	14,106
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	85,656	64,709
Tenant improvements funded directly by tenants	231	4,470
Assumption of other liabilities in connection with development acquisitions	1,478	0
NONCASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common unitholders	31,892	29,906
Accrual of dividends and distributions payable to preferred unitholders	1,656	1,656
Fair value of share-based compensation awards at equity classification date (Note 10)	$ 16,920	$ 0

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Organization and Basis of Presentation

3 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Basis of Presentation

    Organization and Basis of Presentation

Organization

Kilroy Realty Corporation (the “Company”) is a self-administered real estate investment trust (“REIT”) active in premier office submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Los Angeles, Orange County, San Diego County, the San Francisco Bay Area and greater Seattle, which we believe have strategic advantages and strong barriers to entry. Class A real estate encompasses attractive and efficient buildings of high quality that are attractive to tenants, are well-designed and constructed with above-average material, workmanship and finishes and are well-maintained and managed. We qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). The Company’s common stock is publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “KRC.”

We own our interests in all of our real estate assets through Kilroy Realty, L.P. (the “Operating Partnership”) and Kilroy Realty Finance Partnership, L.P. (the “Finance Partnership”). We generally conduct substantially all of our operations through the Operating Partnership. Unless stated otherwise or the context indicates otherwise, the terms “Kilroy Realty Corporation” or the “Company,” “we,” “our,” and “us” refer to Kilroy Realty Corporation and its consolidated subsidiaries and the term “Operating Partnership” refers to Kilroy Realty, L.P. and its consolidated subsidiaries. The descriptions of our business, employees, and properties apply to both the Company and the Operating Partnership.

Our stabilized portfolio of operating properties was comprised of the following office properties at March 31, 2015:

	Number of Buildings	Rentable Square Feet	Number of Tenants	Percentage  Occupied
Stabilized Office Properties	101	13,047,720	515	96.1	%

Our stabilized portfolio includes all of our properties with the exception of development and redevelopment properties currently under construction or committed for construction, “lease-up” properties, real estate assets held for sale and undeveloped land. We define redevelopment properties as those properties for which we expect to spend significant development and construction costs on the existing or acquired buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. As of March 31, 2015, we had no redevelopment properties. We define “lease-up” properties as properties we recently developed or redeveloped that have not yet reached 95% occupancy and are within one year following cessation of major construction activities. There were no operating properties in “lease-up” as of March 31, 2015.

As of March 31, 2015, the following properties were excluded from our stabilized portfolio:

	Number of Properties/Projects	Estimated Rentable Square Feet
Properties held for sale (1)	10	1,044,844
Development projects under construction (2)	6	1,732,000

_______________

(1) Includes one property located in Redmond, Washington and nineproperties located in the Sorrento Mesa/UTC submarkets of San Diego, California. For additional information see Note 3.

(2) Estimated rentable square feet upon completion.

Our stabilized portfolio also excludes our future development pipeline, which is comprised of ten potential development sites, representing approximately 106 gross acres of undeveloped land.

As of March 31, 2015, all of our stabilized portfolio properties and development projects were owned and all of our business was conducted in the state of California with the exception of twelve office properties and a recently acquired development opportunity located in the state of Washington. All of our properties and development projects are 100% owned, excluding a development project owned by Redwood City Partners, LLC (“Redwood LLC”), a consolidated subsidiary (seeNote 1) and certain properties held at qualified intermediaries for potential future transactions that are intended to qualify as like-kind exchanges pursuant to Section 1031 of the Code (“Section 1031 Exchanges”) to defer taxable gains on dispositions for federal and state income tax purposes, which have been consolidated for financial reporting purposes.

As of March 31, 2015, the Company owned an approximate 98.0% common general partnership interest in the Operating Partnership. The remaining approximate 2.0% common limited partnership interest in the Operating Partnership as of March 31, 2015 was owned by non-affiliated investors and certain of our executive officers and directors (see Note 7). Both the general and limited common partnership interests in the Operating Partnership are denominated in common units. Generally, the number of common units held by the Company is equivalent to the number of outstanding shares of the Company’s common stock, and the rights of all the common units to quarterly distributions and payments in liquidation mirror those of the Company’s common stockholders. The common limited partners have certain redemption rights as provided in the Operating Partnership’s Seventh Amended and Restated Agreement of Limited Partnership, as amended, the “Partnership Agreement” (see Note 7).

Kilroy Realty Finance, Inc., which is a wholly owned subsidiary of the Company, is the sole general partner of the Finance Partnership and owns a 1.0% common general partnership interest in the Finance Partnership. The Operating Partnership owns the remaining 99.0% common limited partnership interest. Kilroy Services, LLC (“KSLLC”), which is a wholly owned subsidiary of the Operating Partnership, is the entity through which we generally conduct substantially all of our development activities. With the exception of the Operating Partnership and Redwood LLC, all of our subsidiaries are wholly owned.

Basis of Presentation

The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, the Finance Partnership, KSLLC, Redwood LLC and all of our wholly owned and controlled subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, the Finance Partnership, KSLLC, Redwood LLC and all wholly-owned and controlled subsidiaries of the Operating Partnership. All intercompany balances and transactions have been eliminated in the consolidated financial statements.

The accompanying interim financial statements have been prepared by management in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in conjunction with the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the interim financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements reflect all adjustments of a normal and recurring nature that are considered necessary for a fair presentation of the results for the interim periods presented. However, the results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2015. The interim financial statements for the Company and the Operating Partnership should be read in conjunction with the audited consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014.

Certain amounts in the consolidated statements of operations for prior periods have been reclassified to reflect the activity of discontinued operations disposed of prior to the Company's adoption of Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2014-08 (“ASU 2014-08”). Properties classified as held for sale and/or disposed of prior to January 1, 2015 are presented as discontinued operations for all periods presented.

Variable Interest Entities

At March 31, 2015, the consolidated financial statements of the Company and the Operating Partnership included two variable interest entities (“VIEs”), in which we were deemed to be the primary beneficiary. One VIE, Redwood LLC, was established in the second quarter of 2013 in connection with an undeveloped land acquisition. The other VIE was established during the first quarter of 2015 to facilitate potential future Section 1031 Exchanges to defer taxable gains on dispositions for federal and state income tax purposes. The impact of consolidating the VIEs increased the Company’s total assets, liabilities and noncontrolling interests by approximately $173.0 million (of which $171.1 million related to real estate held for investment on our consolidated balance sheet), approximately $16.5 million and approximately $5.9 million, respectively, as of March 31, 2015.

As of December 31, 2014, the consolidated financial statements of the Company and the Operating Partnership included two VIEs, in which we were deemed to be the primary beneficiary. One of the VIEs was Redwood LLC and the remaining VIE was established during the fourth quarter of 2014 to facilitate potential Section 1031 Exchanges. During the three months ended March 31, 2015, the Section 1031 Exchange was successfully completed and the VIE was terminated. As a result, $59.2 million of our restricted cash balance at December 31, 2014, which related to prior period disposition proceeds that were set aside to facilitate the Section 1031 Exchange, was released from escrow. The impact of consolidating the VIEs increased the Company’s total assets, liabilities and noncontrolling interests by approximately $219.6 million (of which $211.8 million related to real estate held for investment on our consolidated balance sheet), approximately $23.4 million and approximately 5.9 million, respectively, as of December 31, 2014.

Adoption of New Accounting Pronouncements

Effective January 1, 2015, the Company adopted FASB ASU 2014-08, which changed the criteria for reporting discontinued operations while enhancing disclosures in this area. Under the new guidance, only disposals representing a strategic shift that has (or will have) a major effect on an entity's operations and final results, such as a major line of business, a major geographical area or a major equity investment, should be presented as discontinued operations. The Company adopted and applied the new guidance on a prospective basis as required by ASU 2014-08. Therefore, real estate assets classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift will be presented in continuing operations for all periods presented. Properties classified as held for sale and/or disposed of prior to January 1, 2015 will continue to be presented in discontinued operations for prior periods presented. In accordance with this guidance, the operations of the ten properties held for sale at March 31, 2015 are presented in continuing operations for the three months ended March 31, 2015. For the three months ended March 31, 2014, discontinued operations includes the income and gains on all of the properties sold in 2014.

Recently Issued Accounting Pronouncements

On April 7, 2015 the FASB issued ASU No. 2015-03 (“ASU 2015-03”) to amend the accounting guidance for the presentation of debt issuance costs. The standard requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. ASU 2015-03 is effective for public business entities for fiscal years beginning after December 15, 2015 and retrospective application is required. Early adoption of the guidance is permitted. The Company expects to adopt the guidance effective January 1, 2016 and the guidance is not anticipated to have a material impact on our consolidated financial statements or notes to our consolidated financial statements.

On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however if the proposed deferral is approved, adoption is required for annual reporting periods beginning after December 15, 2017. The Company is currently assessing the impact of the guidance on our consolidated financial statements or notes to our consolidated financial statements.

On February 18, 2015 the FASB issued ASU No. 2015-02 (“ASU 2015-02”) to amend the accounting guidance for consolidation. The standard simplifies the current guidance for consolidation and reduces the number of consolidation models through the elimination of the indefinite deferral of Statement 167. Additionally, the standard places more emphasis on risk of loss when determining a controlling financial interest. ASU 2015-02 is effective for all entities for reporting periods (including interim periods) beginning after December 15, 2015, and early adoption is permitted. The Company expects to adopt the guidance effective January 1, 2016 and the guidance is not anticipated to have a material impact on our consolidated financial statements or notes to our consolidated financial statements.

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Net Income Available to Common Stockholders Per Share of the Company (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Numerator:
Income from continuing operations	$ 44,002		$ 10,874
(Income) Loss from continuing operations attributable to noncontrolling common units of the Operating Partnership	(815)		(160)
Preferred dividends	(3,313)		(3,313)
Allocation to participating securities	(415)	[1]	(427)	[1]
Numerator for basic and diluted income from continuing operations available to common stockholders	39,459		6,974
Income from discontinued operations	0	[2]	91,058	[2]
Income from discontinued operations attributable to noncontrolling common units of the Operating Partnership	0	[2]	(1,927)	[2]
Numerator for basic and diluted net income available to common stockholders	39,459		96,105
Denominator:
Weighted average common shares outstanding – basic (Note 13)	86,896,776		82,124,538
Effect of dilutive securities	537,590		2,015,532
Weighted average common shares outstanding-diluted	87,434,366		84,140,070
Basic earnings per share:
Income (loss) from continuing operations available to common stockholders per common share – basic (Note 14)	$ 0.45		$ 0.08
Income from discontinued operations per common share	$ 0.00	[2]	$ 1.09	[2]
Net income available to common stockholders per share-basic	$ 0.45		$ 1.17
Diluted earnings per share:
Income from continuing operations available to common stockholders per common share – diluted (Note 13)	$ 0.45		$ 0.08
Income from discontinued operations per common share	$ 0.00	[2]	$ 1.06	[2]
Net income available to common stockholders per share-diluted	$ 0.45		$ 1.14
Kilroy Realty, L.P. [Member]
Numerator:
Income from continuing operations	44,002		10,874
Preferred dividends	(3,313)		(3,313)
Allocation to participating securities	(415)	[1]	(427)	[1]
Numerator for basic and diluted income from continuing operations available to common stockholders	40,199		7,069
Income from discontinued operations	0	[2]	91,058	[2]
Numerator for basic and diluted net income available to common stockholders	$ 40,199		$ 98,127
Denominator:
Weighted average common shares outstanding – basic (Note 13)	88,693,306		83,928,993
Effect of dilutive securities	537,590		2,015,532
Weighted average common shares outstanding-diluted	89,230,896		85,944,525
Basic earnings per share:
Income (loss) from continuing operations available to common stockholders per common share – basic (Note 14)	$ 0.45		$ 0.08
Income from discontinued operations per common share	$ 0.00	[2]	$ 1.09	[2]
Net income available to common stockholders per share-basic	$ 0.45		$ 1.17
Diluted earnings per share:
Income from continuing operations available to common stockholders per common share – diluted (Note 13)	$ 0.45		$ 0.08
Income from discontinued operations per common share	$ 0.00	[2]	$ 1.06	[2]
Net income available to common stockholders per share-diluted	$ 0.45		$ 1.14

[1] Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

[2] The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 1). As a result, properties classified as held for sale and/or disposed of subsequent to January 1, 2015 that do not represent a strategic shift are no longer presented as discontinued operations.

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Subsequent Events (Details) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 15, 2015	Apr. 28, 2015
Subsequent Event [Line Items]
Aggregate dividends, distributions, and dividend equivalents paid to common stockholders and common unitholders	$ 30,846,000	$ 29,561,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate dividends, distributions, and dividend equivalents paid to common stockholders and common unitholders			31,900,000
San Diego Properties, San Diego, CA [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Dispositions Sales Price			95,000,000
Redmond, WA Operating Property [Member] [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Dispositions Sales Price				$ 51,200,000

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Fair Value Measurements and Disclosures (Details 1) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Liabilities
Secured Debt	$ 516,725,000	[1]	$ 546,292,000	[1]
Unsecured debt	1,783,280,000		1,783,121,000
Unsecured line of credit	130,000,000		140,000,000
Carrying Value
Liabilities
Secured Debt	516,725,000	[2]	546,292,000	[2]
Unsecured debt	1,783,280,000	[3]	1,783,121,000	[3]
Unsecured line of credit	130,000,000	[2]	140,000,000	[2]
Carrying Value | Fair Value (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	513,800,000		513,700,000
Carrying Value | Unsecured Debt [Member] | Fair Value (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	1,269,500,000		1,269,400,000
Fair Value
Liabilities
Secured Debt	525,495,000	[2]	559,483,000	[2]
Unsecured debt	1,870,576,000	[3]	1,858,492,000	[3]
Unsecured line of credit	130,032,000	[2]	145,051,000	[2]
Fair Value | Fair Value (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	535,400,000		536,300,000
Fair Value | Unsecured Debt [Member] | Fair Value (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,335,200,000				$ 1,322,200,000

[1] Amounts reported include the amounts of unamortized debt premiums of $9.2 million and $10.3 million as of March 31, 2015 and December 31, 2014, respectively.

[2] Fair value calculated using Level II inputs, which are based on model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

[3] Fair value calculated using Level I and Level II inputs. Level I inputs are based on quoted prices for identical instruments in active markets. The carrying value and fair value of the Level I instruments was $1,269.5 million and $1,335.2 million, respectively, as of March 31, 2015. The carrying value and fair value of the Level I instruments as of December 31, 2014, was $1,269.4 million and $1,322.2 million, respectively. The carrying value and fair value of the Level II instruments was $513.8 million and $535.4 million, respectively, as of March 31, 2015. The carrying value and fair value of the Level II instruments as of December 31, 2014, was $513.7 million and $536.3 million, respectively.

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Real Estate Assets Held for Sale and Dispositions (Tables)

3 Months Ended

Mar. 31, 2015

Discontinued Operations and Disposal Groups [Abstract]

Disclosure of Long Lived Assets Held-for-sale [Table Text Block]

The major classes of assets and liabilities of the properties held for sale as of March 31, 2015 were as follows:

Real estate assets and other assets held for sale	(in thousands)
Land and improvements	$	38,706
Buildings and improvements	198,125
Total real estate held for sale	236,831
Accumulated depreciation and amortization	(66,421		)
Total real estate held for sale, net	170,410
Current receivables, net	185
Deferred rent receivables, net	7,285
Deferred leasing costs and acquisition-related intangible assets, net	12,364
Prepaid expenses and other assets, net	507
Real estate and other assets held for sale, net	$	190,751
Liabilities and deferred revenue of real estate assets held for sale
Accounts payable, accrued expenses and other liabilities	$	7,376
Deferred revenue and acquisition-related intangible liabilities, net	1,367
Rents received in advance and tenant security deposits	1,025
Liabilities and deferred revenue of real estate assets held for sale	$	9,768

As ofMarch 31, 2015, the following operating properties were classified as held for sale:

Location	City/Submarket	Property Type	Number of Buildings	Rentable Square Feet
15050 NE 36th Street	Redmond, WA	Office	1	122,103
San Diego Properties (1)	Sorrento Mesa, CA	Office	9	922,741
Total properties held for sale			10	1,044,844

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Secured Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Debt Instrument [Line Items]
Secured Debt	$ 516,725,000	[1]	$ 546,292,000	[1]
Secured Debt [Member]
Debt Instrument [Line Items]
Unamortized premium	9,200,000		10,300,000
Kilroy Realty, L.P. [Member]
Debt Instrument [Line Items]
Secured Debt	516,725,000		546,292,000
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 4.27% Mortgage Payable due Feb. 01, 2018 [Member]
Debt Instrument [Line Items]
Annual Stated Interest Rate	4.27%	[2]
Effective interest rate	4.27%	[2],[3]
Maturity Date	Feb. 01, 2018
Secured Debt	130,164,000	[1]	130,767,000	[1]
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 4.48% Mortgage Payable due July 1, 2027 [Member]
Debt Instrument [Line Items]
Annual Stated Interest Rate	4.48%	[2]
Effective interest rate	4.48%	[2],[3]
Maturity Date	Jul. 01, 2027
Secured Debt	97,000,000	[1],[4]	97,000,000	[1],[4]
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 6.05% Mortgage Payable Due June 1, 2019 [Member]
Debt Instrument [Line Items]
Annual Stated Interest Rate	6.05%	[2]
Effective interest rate	3.50%	[2],[3]
Maturity Date	Jun. 01, 2019
Secured Debt	88,411,000	[1],[4]	89,242,000	[1],[4]
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 6.51% Mortgage Payable due Feb. 01, 2017 [Member]
Debt Instrument [Line Items]
Annual Stated Interest Rate	6.51%	[2]
Effective interest rate	6.51%	[2],[3]
Maturity Date	Feb. 01, 2017
Secured Debt	66,383,000	[1]	66,647,000	[1]
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 5.23% Mortgage Payable due Jan. 01, 2016 [Member]
Debt Instrument [Line Items]
Annual Stated Interest Rate	5.23%	[2]
Effective interest rate	3.50%	[2],[3]
Maturity Date	Jan. 01, 2016
Secured Debt	52,332,000	[1],[4]	52,793,000	[1],[4]
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 5.57% Morgage Payable Due Feb. 11, 2016 [Member]
Debt Instrument [Line Items]
Annual Stated Interest Rate	5.57%	[2]
Effective interest rate	3.25%	[2],[3]
Maturity Date	Feb. 11, 2016
Secured Debt	39,895,000	[1],[4]	40,258,000	[1],[4]
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 5.09% Mortgage Payable due Aug. 7, 2015 [Member]
Debt Instrument [Line Items]
Annual Stated Interest Rate	5.09%	[2]
Effective interest rate	3.50%	[2],[3]
Maturity Date	Aug. 07, 2015
Secured Debt	34,178,000	[1],[4]	34,311,000	[1],[4]
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | Four Point Nine four Percent Mortgage Payable due April Fifteen Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Annual Stated Interest Rate	4.94%	[2]
Effective interest rate	4.00%	[2],[3]
Maturity Date	Apr. 15, 2015
Secured Debt	0	[1],[5]	26,285,000	[1],[5]
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 7.15% Mortgage Payable due May 01, 2017 [Member]
Debt Instrument [Line Items]
Annual Stated Interest Rate	7.15%	[2]
Effective interest rate	7.15%	[2],[3]
Maturity Date	May 01, 2017
Secured Debt	5,940,000	[1]	6,568,000	[1]
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | Municipal Bonds [Member]
Debt Instrument [Line Items]
Secured Debt	$ 2,422,000	[1]	$ 2,421,000	[1]

[1] Amounts reported include the amounts of unamortized debt premiums of $9.2 million and $10.3 million as of March 31, 2015 and December 31, 2014, respectively.

[2] All interest rates presented are fixed-rate interest rates.

[3] This represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of discounts/premiums, excluding debt issuance costs.

[4] The secured debt and the related properties that secure the debt are held in a special purpose entity and the properties are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

[5] This mortgage note payable was repaid during the three months ended March 31, 2015 prior to maturity at par.

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Secured and Unsecured Debt of the Operating Partnership (Kilroy Realty, L.P. [Member])

3 Months Ended

Mar. 31, 2015

Kilroy Realty, L.P. [Member]

Debt Instrument [Line Items]

Secured and Unsecured Debt of the Operating Partnership

Secured and Unsecured Debt of the Operating Partnership

Secured Debt

The following table sets forth the composition of our secured debt as of March 31, 2015 and December 31, 2014:

Type of Debt	Annual Stated Interest Rate (1)	GAAP Effective Rate (1)(2)	Maturity Date	March 31, 2015 (3)		December 31, 2014 (3)
				(in thousands)
Mortgage note payable	4.27%	4.27%	February 2018	$	130,164	$	130,767
Mortgage note payable (4)	4.48%	4.48%	July 2027	97,000		97,000
Mortgage note payable (4)	6.05%	3.50%	June 2019	88,411		89,242
Mortgage note payable	6.51%	6.51%	February 2017	66,383		66,647
Mortgage note payable (4)	5.23%	3.50%	January 2016	52,332		52,793
Mortgage note payable (4)	5.57%	3.25%	February 2016	39,895		40,258
Mortgage note payable(4)	5.09%	3.50%	August 2015	34,178		34,311
Mortgage note payable(5)	4.94%	4.00%	April 2015	—		26,285
Mortgage note payable	7.15%	7.15%	May 2017	5,940		6,568
Other	Various	Various	Various	2,422		2,421
Total				$	516,725	$	546,292

______________

(1) All interest rates presented are fixed-rate interest rates.

(2) This represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of discounts/premiums, excluding debt issuance costs.

(3) Amounts reported include the amounts of unamortized debt premiums of $9.2 million and $10.3 million as of March 31, 2015 and December 31, 2014, respectively.

(4) The secured debt and the related properties that secure the debt are held in a special purpose entity and the properties are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

(5) This mortgage note payable was repaid during the three months ended March 31, 2015 prior to maturity at par.

Although our mortgage loans are secured and non-recourse to the Company and the Operating Partnership, the Company provides limited customary secured debt guarantees for items such as voluntary bankruptcy, fraud, misapplication of payments and environmental liabilities.

Unsecured Senior Notes

The following table summarizes the balance and significant terms of the registered unsecured senior notes issued by the Operating Partnership as of March 31, 2015 and December 31, 2014:

					Principal Amount as of
	Issuance date	Maturity date	Stated coupon rate	Effective interest rate (1)	March 31, 2015			December 31, 2014
					(in thousands)
4.250% Unsecured Senior Notes (2)	July 2014	August 2029	4.250%	4.350%	$	400,000		$	400,000
Unamortized discount					(4,273		)	(4,348		)
Net carrying amount					$	395,727		$	395,652
3.800% Unsecured Senior Notes (3)	January 2013	January 2023	3.800%	3.804%	$	300,000		$	300,000
Unamortized discount					(77		)	(79		)
Net carrying amount					$	299,923		$	299,921
4.800% Unsecured Senior Notes (3)	July 2011	July 2018	4.800%	4.827%	$	325,000		$	325,000
Unamortized discount					(246		)	(265		)
Net carrying amount					$	324,754		$	324,735
6.625% Unsecured Senior Notes (4)	May 2010	June 2020	6.625%	6.743%	$	250,000		$	250,000
Unamortized discount					(1,101		)	(1,154		)
Net carrying amount					$	248,899		$	248,846
5.000% Unsecured Senior Notes (5)	November 2010	November 2015	5.000%	5.014%	$	325,000		$	325,000
Unamortized discount					(23		)	(33		)
Net carrying amount					$	324,977		$	324,967

_______________________

(1) This represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of initial issuance discounts, excluding debt issuance costs.

(2) Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year.

(3) Interest on these notes is payable semi-annually in arrears on January 15th and July 15th of each year.

(4) Interest on these notes is payable semi-annually in arrears on June 1st and December 1st of each year.

(5) Interest on these notes is payable semi-annually in arrears on May 3rd and November 3rd of each year.

Unsecured Revolving Credit Facility and Term Loan Facility

The following table summarizes the balance and terms of our unsecured revolving credit facility as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Outstanding borrowings	$	130,000		$	140,000
Remaining borrowing capacity	470,000			460,000
Total borrowing capacity (1)	$	600,000		$	600,000
Interest rate (2)	1.43		%	1.41		%
Facility fee-annual rate (3)	0.250%
Maturity date	July 2019

_______________

(1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $311.0 million under an accordion feature under the terms of the unsecured revolving credit facility and term loan facility.

(2) Our revolving credit facility interest rate was calculated based on an annual rate of LIBOR plus 1.250%.

(3) Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of March 31, 2015, $5.6 million of deferred financing costs remains to be amortized through the maturity date of our unsecured revolving credit facility.

The Company intends to borrow amounts under the unsecured revolving credit facility from time to time for general corporate purposes, to fund potential acquisitions, to finance development and redevelopment expenditures and to potentially repay long-term debt.

The following table summarizes the balance and terms of our term loan facility as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Outstanding borrowings	$	150,000		$	150,000
Interest rate (1)	1.58		%	1.56		%
Maturity date	July 2019

_______________

(1) Our unsecured term loan facility interest rate was calculated based on an annual rate of LIBOR plus 1.40%.

Additionally, the Company has a $39.0 million unsecured term loan with an annual interest rate of LIBOR plus 1.40% that matures in July 2019.

Debt Covenants and Restrictions

The unsecured revolving credit facility, the unsecured term loan facility, the unsecured term loan, the unsecured senior notes, and certain other secured debt arrangements contain covenants and restrictions requiring us to meet certain financial ratios and reporting requirements. Some of the more restrictive financial covenants include a maximum ratio of total debt to total asset value, a minimum fixed-charge coverage ratio, a minimum unsecured debt ratio and a minimum unencumbered asset pool debt service coverage ratio. Noncompliance with one or more of the covenants and restrictions could result in the full principal balance of the associated debt becoming immediately due and payable. We believe we were in compliance with all of our debt covenants as of March 31, 2015.

Debt Maturities

The following table summarizes the stated debt maturities and scheduled amortization payments, excluding debt discounts and premiums, as of March 31, 2015:

Year	(in thousands)
Remaining 2015	$	366,630
2016	99,431
2017	71,748
2018	451,728
2019	395,369
Thereafter	1,041,644
Total (1)	$	2,426,550

________________________

(1) Includes gross principal balance of outstanding debt before impact of net unamortized premiums totaling approximately $3.5 million.

Capitalized Interest and Loan Fees

The following table sets forth gross interest expense reported in continuing operations, including debt discount/premium and loan cost amortization, net of capitalized interest, for the three months ended March 31, 2015 and 2014. The interest expense capitalized was recorded as a cost of development and redevelopment, and increased the carrying value of undeveloped land and construction in progress.

	Three Months Ended March 31,
	2015			2014
	(in thousands)
Gross interest expense	$	27,749		$	28,034
Capitalized interest and loan fees	(10,871		)	(10,782		)
Interest expense	$	16,878		$	17,252

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

General

As of March 31, 2015, we had commitments of approximately $412.6 million, excluding our ground lease commitments, for contracts and executed leases directly related to our operating and redevelopment properties.

Environmental Matters

We follow the policy of monitoring all of our properties, both acquisition and existing stabilized portfolio properties, for the presence of hazardous or toxic substances. While there can be no assurance that a material environmental liability does not exist, we are not currently aware of any environmental liability with respect to our stabilized portfolio properties that would have a material adverse effect on our financial condition, results of operations and cash flow, or that we believe would require additional disclosure or the recording of a loss contingency.

As of March 31, 2015, we had accrued environmental remediation liabilities of approximately $16.1 million recorded on our consolidated balance sheets in connection with certain of our recent development acquisitions and related development activities. It is possible that we could incur additional environmental remediation costs in connection with these recent development acquisitions.  However, given we are in the very early stages of development, possible additional environmental costs are not reasonably estimable at this time.

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Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization Of Intangible Liabilities	$ (9,092)		$ (11,288)
Deferred Leasing Costs [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization of Intangible Assets	6,822	[1]	6,780	[1]
Estimated annual amortization related to acquisition-related intangibles
Remaining 2014	19,561
2015	23,763
2016	20,881
2017	17,275
2018	13,440
Thereafter	31,764
Finite-lived intangible assets, net	126,684				141,198
Above-Market Leases [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization of Intangible Assets	911	[2]	1,490	[2]
Estimated annual amortization related to acquisition-related intangibles
Remaining 2014	1,619	[3]
2015	1,503	[3]
2016	1,241	[3]
2017	831	[3]
2018	643	[3]
Thereafter	34	[3]
Finite-lived intangible assets, net	5,871	[3]			6,782
In-Place Leases [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization of Intangible Assets	4,221	[1]	6,136	[1]
Estimated annual amortization related to acquisition-related intangibles
Remaining 2014	9,829
2015	10,741
2016	9,281
2017	6,373
2018	4,714
Thereafter	8,291
Finite-lived intangible assets, net	49,229				53,477
Below Market Ground Lease Obligation [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization of Intangible Assets	2	[4]	0	[4]
Estimated annual amortization related to acquisition-related intangibles
Remaining 2014	6	[5]
2015	8	[5]
2016	8	[5]
2017	8	[5]
2018	8	[5]
Thereafter	429	[5]
Finite-lived intangible assets, net	467	[5]			469
Below Market Leases [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization Of Intangible Liabilities	(2,839)	[6]	(3,093)	[6]
Estimated annual amortization related to acquisition-related intangibles
Remaining 2014	(7,239)	[7]
2015	(8,189)	[7]
2016	(7,337)	[7]
2017	(5,735)	[7]
2018	(3,597)	[7]
Thereafter	(2,473)	[7]
Acquisition-related Intangible Liabilities, net	(34,570)	[7]			(37,431)
Above-Market Ground Lease Obligation [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization Of Intangible Liabilities	(25)	[8]	(25)	[8]
Estimated annual amortization related to acquisition-related intangibles
Remaining 2014	(76)	[9]
2015	(101)	[9]
2016	(101)	[9]
2017	(101)	[9]
2018	(101)	[9]
Thereafter	(5,491)	[9]
Acquisition-related Intangible Liabilities, net	$ (5,971)	[9]			$ (5,996)

[1] The amortization of deferred leasing costs related to lease incentives is recorded to rental income and other deferred leasing costs and in-place leases is recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.

[2] The amortization of above-market operating leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.

[3] Represents estimated annual amortization related to above-market operating leases. Amounts will be recorded as a decrease to rental income in the consolidated statements of operations.

[4] The amortization of the below-market ground lease obligation is recorded as an increase to ground lease expense in the consolidated statements of operations for the periods presented.

[5] Represents estimated annual amortization related to below-market ground lease obligations. Amounts will be recorded as an increase to ground lease expense in the consolidated statements of operations.

[6] The amortization of below-market operating leases is recorded as an increase to rental income in the consolidated statements of operations for the periods presented.

[7] Represents estimated annual amortization related to below-market operating leases. Amounts will be recorded as an increase to rental income in the consolidated statements of operations.

[8] The amortization of the above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

[9] Represents estimated annual amortization related to above-market ground lease obligations. Amounts will be recorded as a decrease to ground lease expense in the consolidated statements of operations.

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Fair Value Measurements and Disclosures (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Fair value of the company's marketable securities

The following table sets forth the fair value of our marketable securities as of March 31, 2015 and December 31, 2014:

	Fair Value (Level  1) (1)
	March 31, 2015		December 31, 2014
Description	(in thousands)
Marketable securities (2)	$	13,337	$	11,971

_______________

(1) Based on quoted prices in active markets for identical securities.

(2) The marketable securities are held in a limited rabbi trust.

Fair value adjustment of marketable securities and deferred compensation plan liability

The following table sets forth the net gain on marketable securities recorded during the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015		2014
Description	(in thousands)
Net gain on marketable securities	$	388	$	154

Carrying value and fair value of company's remaining financial assets and liabilities

The following table sets forth the carrying value and the fair value of our other financial instruments as of March 31, 2015 and December 31, 2014:

	March 31, 2015				December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in thousands)
Liabilities
Secured debt (1)	$	516,725	$	525,495	$	546,292	$	559,483
Unsecured debt, net (2)	1,783,280		1,870,576		1,783,121		1,858,492
Unsecured line of credit (1)	130,000		130,032		140,000		145,051

_______________

(1) Fair value calculated using Level II inputs, which are based on model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

(2) Fair value calculated using Level I and Level II inputs. Level I inputs are based on quoted prices for identical instruments in active markets. The carrying value and fair value of the Level I instruments was $1,269.5 million and $1,335.2 million, respectively, as of March 31, 2015. The carrying value and fair value of the Level I instruments as of December 31, 2014, was $1,269.4 million and $1,322.2 million, respectively. The carrying value and fair value of the Level II instruments was $513.8 million and $535.4 million, respectively, as of March 31, 2015. The carrying value and fair value of the Level II instruments as of December 31, 2014, was $513.7 million and $536.3 million, respectively.

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Consolidated Statements of Equity (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Total USD ($)	Common Stock [Member] USD ($)	Total Stockholders' Equity USD ($)	Preferred Stock [Member] USD ($)	Common Stock Additional Paid-in Capital USD ($)	Common Stock Distributions in Excess of Earnings USD ($)	Noncontrolling Interest [Member] USD ($)	Kilroy Realty, L.P. [Member] USD ($)	Kilroy Realty, L.P. [Member] Noncontrolling Interest [Member] USD ($)	Common Stock [Member]	Issuance of Equity under ATM Program [Member] Common Stock [Member]
Beginning Balance at Dec. 31, 2013	$ 2,516,160	$ 822	$ 2,461,312	$ 192,411	$ 2,478,975	$ (210,896)	$ 54,848
Beginning Balance, shares at Dec. 31, 2013		82,153,944
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	101,932							101,932	65
Noncash amortization of share-based compensation	2,233		2,233		2,233			2,233
Repurchase of common stock and restricted stock units, shares		(26,074)
Repurchase of common stock and restricted stock units	(1,517)		(1,517)		(1,517)
Settlement of restricted stock units for shares of common stock, shares		88,962
Settlement of restricted stock units for shares of common stock	0		0		0			0
Exercise of stock options (Note 10)		500
Exercise of stock options (Note 10)	21		21		21
Exchange of common units of the Operating Parternship, shares		1,000
Exchange of common units of the Operating Partnership	0		28		28		(28)
Preferred dividends	(3,313)		(3,313)			(3,313)		(3,313)
Dividends declared per common share and common unit ($0.35 per share/unit)	(29,906)		(29,272)			(29,272)	(634)
Ending Balance at Mar. 31, 2014	2,585,610	822	2,529,337	192,411	2,479,740	(143,636)	56,273
Ending Balance, shares at Mar. 31, 2014		82,218,332
Beginning Balance at Dec. 31, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	101,932		99,845			99,845	2,087
Ending Balance at Dec. 31, 2013	2,516,160		2,461,312	192,411		(210,896)	54,848
Beginning Balance at Dec. 31, 2014	2,723,936	863	2,666,210	192,411	2,635,900	(162,964)	57,726
Beginning Balance, shares at Dec. 31, 2014		86,259,684								86,259,684
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	44,002		43,187			43,187	815	44,002	75
Issuance of common stock, shares (Note 8)		1,507,393									1,507,393
Issuance of common stock (Note 8)	113,097	15	113,097		113,082
Issuance of share-based compensation awards, shares
Issuance of share-based compensation awards	413		413		413
Noncash amortization of share-based compensation	4,302		4,302		4,302			4,302
Repurchase of common stock and restricted stock units, shares		(20,429)
Repurchase of common stock and restricted stock units	(1,821)		(1,821)		(1,821)
Settlement of restricted stock units for shares of common stock, shares		36,699
Settlement of restricted stock units for shares of common stock	0		0		0			0
Exercise of stock options (Note 10)		237,000
Exercise of stock options (Note 10)	10,482	2	10,482		10,480
Exchange of common units of the Operating Parternship, shares		11,030
Exchange of common units of the Operating Partnership	0		316		316		(316)
Adjustment for noncontrolling interest	0		(1,496)		(1,496)		1,496
Preferred dividends	(3,313)		(3,313)			(3,313)		(3,313)
Dividends declared per common share and common unit ($0.35 per share/unit)	(31,892)		(31,265)			(31,265)	(627)
Ending Balance at Mar. 31, 2015	$ 2,859,206	$ 880	$ 2,800,112	$ 192,411	$ 2,761,176	$ (154,355)	$ 59,094
Ending Balance, shares at Mar. 31, 2015		88,031,377								88,031,377

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Consolidated Balance Sheets (KILROY REALTY, L.P.) (Parenthetical) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Carrying amounts of consolidated VIE	$ 171,120,000	$ 211,755,000
Common units held by limited partners	1,793,170	1,804,200
Common stock, par value	$ 0.01
Kilroy Realty, L.P. [Member]
Carrying amounts of consolidated VIE	171,120,000	211,755,000
Kilroy Realty, L.P. [Member] | Common Units [Member]
General partner, units issued	88,031,377	86,259,684
General partners, units outstanding	88,031,377	86,259,684
Limited partners, units issued	1,793,170	1,804,200
Common units held by limited partners	1,793,170	1,804,200
Kilroy Realty, L.P. [Member] | Series G Cumulative Redeemable Preferred Unit [Member]
Preferred Units, Issued	4,000,000	4,000,000
Preferred Units, Outstanding	4,000,000	4,000,000
Preferred stock dividend rate percentage	6.875%	6.875%
Preferred Stock Liquidation preference	100,000,000	100,000,000
Kilroy Realty, L.P. [Member] | Series H Cumulative Redeemable Preferred Unit [Member]
Preferred Units, Issued	4,000,000	4,000,000
Preferred Units, Outstanding	4,000,000	4,000,000
Preferred stock dividend rate percentage	6.375%	6.375%
Preferred Stock Liquidation preference	$ 100,000,000	$ 100,000,000

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Stockholders' Equity of the Company (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Common Stock of the Company [Abstract]
Net proceeds from issuance of common stock (Note 8)	$ 113,097,000	$ 0
Common Stock [Member]
Common Stock of the Company [Abstract]
Common stock, shares issued	88,031,377		86,259,684
Issuance of Equity - at the market offering [Member] | Common Stock [Member]
Common Stock of the Company [Abstract]
At Market Stock Aggregate Gross Sales Price of Common Stock	124,700,000
March 2015 At-The-Market Program [Member]
Common Stock of the Company [Abstract]
Common stock, shares issued	1,648,893
Issuance of Equity under ATM Program [Member] | Common Stock [Member]
Class of Stock [Line Items]
At Market Stock Offering Program Aggregate Value Of Common Stock	300,000,000
Common Stock of the Company [Abstract]
Issuance of common stock, shares (Note 8)	1,507,393
Average price per common shares sold	$ 76.09
Net proceeds from issuance of common stock (Note 8)	114,700,000
At the Market Stock Offering Program Remained Available For Issuance	175,300,000
Proceeds from Issuance of Common stock, net	$ 113,200,000

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Fair Value Measurements and Disclosures

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements and Disclosures

Fair Value Measurements and Disclosures

Assets and Liabilities Reported at Fair Value

The only assets we record at fair value on our consolidated financial statements are the marketable securities related to our Deferred Compensation Plan. The following table sets forth the fair value of our marketable securities as of March 31, 2015 and December 31, 2014:

	Fair Value (Level  1) (1)
	March 31, 2015		December 31, 2014
Description	(in thousands)
Marketable securities (2)	$	13,337	$	11,971

_______________

(1) Based on quoted prices in active markets for identical securities.

(2) The marketable securities are held in a limited rabbi trust.

We report the change in the fair value of the marketable securities at the end of each accounting period in interest income and other net investment gains in the consolidated statements of operations. We also adjust the related Deferred Compensation Plan liability to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each participant, which results in a corresponding increase or decrease to compensation cost for the period.

The following table sets forth the net gain on marketable securities recorded during the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015		2014
Description	(in thousands)
Net gain on marketable securities	$	388	$	154

Financial Instruments Disclosed at Fair Value

The following table sets forth the carrying value and the fair value of our other financial instruments as of March 31, 2015 and December 31, 2014:

	March 31, 2015				December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(in thousands)
Liabilities
Secured debt (1)	$	516,725	$	525,495	$	546,292	$	559,483
Unsecured debt, net (2)	1,783,280		1,870,576		1,783,121		1,858,492
Unsecured line of credit (1)	130,000		130,032		140,000		145,051

_______________

(1) Fair value calculated using Level II inputs, which are based on model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

(2) Fair value calculated using Level I and Level II inputs. Level I inputs are based on quoted prices for identical instruments in active markets. The carrying value and fair value of the Level I instruments was $1,269.5 million and $1,335.2 million, respectively, as of March 31, 2015. The carrying value and fair value of the Level I instruments as of December 31, 2014, was $1,269.4 million and $1,322.2 million, respectively. The carrying value and fair value of the Level II instruments was $513.8 million and $535.4 million, respectively, as of March 31, 2015. The carrying value and fair value of the Level II instruments as of December 31, 2014, was $513.7 million and $536.3 million, respectively.

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Stockholders' Equity of the Company (Tables)

3 Months Ended

Mar. 31, 2015

Class of Stock [Line Items]

Schedule of Stockholders Equity [Table Text Block]

The following table sets forth information regarding sales of our common stock under our at-the-market offering program for the three months ended March 31, 2015:

	Three months  ended March 31, 2015
	(in millions, except share and per share data)
Shares of common stock sold during the three month period	1,507,393
Weighted average price per common share	$	76.09
Aggregate gross proceeds	$	114.7
Aggregate net proceeds after sales agent compensation	$	113.2

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Receivables

3 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Receivables

Receivables

Current Receivables, net

Current receivables, net is primarily comprised of contractual rents and other lease-related obligations due from tenants. The balance consisted of the following as of March 31, 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014
	(in thousands)
Current receivables (1)	$	10,107		$	9,228
Allowance for uncollectible tenant receivables (1)	(1,985		)	(1,999		)
Current receivables, net (1)	$	8,122		$	7,229

______________

(1) Excludes current receivables, net related to properties held for sale.

Deferred Rent Receivables, net

Deferred rent receivables, net consisted of the following as of March 31, 2015 and December 31, 2014:

	March 31, 2015 (1)			December 31, 2014
	(in thousands)
Deferred rent receivables	$	170,736		$	158,405
Allowance for deferred rent receivables	(2,155		)	(1,989		)
Deferred rent receivables, net	$	168,581		$	156,416

______________

(1) Excludes deferred rent receivables, net related to properties held for sale as of March 31, 2015.