CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
REAL ESTATE ASSETS (Notes 2, 3 and 4):
Land and improvements	$ 1,731,982	$ 1,628,848
Buildings and improvements	7,543,585	6,783,092
Undeveloped land and construction in progress	2,017,126	1,778,106
Total real estate assets held for investment	11,292,693	10,190,046
Accumulated depreciation and amortization	(2,003,656)	(1,798,646)
Total real estate assets held for investment, net	9,289,037	8,391,400
CASH AND CASH EQUIVALENTS (Note 22)	414,077	731,991
RESTRICTED CASH (Notes 4 and 22)	13,006	91,139
MARKETABLE SECURITIES (Notes 16 and 19)	27,475	27,481
CURRENT RECEIVABLES, NET (Notes 2 and 6)	14,386	12,007
DEFERRED RENT RECEIVABLES, NET (Notes 2 and 6)	405,665	386,658
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2, 3 and 5)	234,458	210,949
RIGHT OF USE GROUND LEASE ASSETS (Note 18)	127,302	95,523
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 7)	57,991	53,560
TOTAL ASSETS	10,583,397	10,000,708
LIABILITIES:
Secured debt, net (Notes 8, 9 and 19)	248,367	253,582
Unsecured debt, net (Notes 8, 9 and 19)	3,820,383	3,670,099
Accounts payable, accrued expenses and other liabilities (Note 18)	391,264	445,100
Ground lease liabilities (Note 18)	125,550	97,778
Accrued dividends and distributions (Notes 13 and 25)	61,850	59,431
Deferred revenue and acquisition-related intangible liabilities, net (Notes 2, 3, 5 and 10)	171,151	128,523
Rents received in advance and tenant security deposits	74,962	68,874
Total liabilities	4,893,527	4,723,387
COMMITMENTS AND CONTINGENCIES (Note 18)
Stockholders’ Equity (Note 13):
Common stock, $.01 par value, 280,000,000 shares authorized, 116,464,169 and 116,035,827 shares issued and outstanding, respectively	1,165	1,160
Additional paid-in capital	5,155,232	5,131,916
Retained earnings (distributions in excess of earnings)	283,663	(103,133)
Total stockholders’ equity	5,440,060	5,029,943
Noncontrolling Interests (Notes 2 and 11):
Common units of the Operating Partnership	53,746	49,875
Noncontrolling interests in consolidated property partnerships	196,064	197,503
Total noncontrolling interests	249,810	247,378
Total equity	5,689,870	5,277,321
CAPITAL:
TOTAL LIABILITIES AND EQUITY	10,583,397	10,000,708
Kilroy Realty L.P.
REAL ESTATE ASSETS (Notes 2, 3 and 4):
Land and improvements	1,731,982	1,628,848
Buildings and improvements	7,543,585	6,783,092
Undeveloped land and construction in progress	2,017,126	1,778,106
Total real estate assets held for investment	11,292,693	10,190,046
Accumulated depreciation and amortization	(2,003,656)	(1,798,646)
Total real estate assets held for investment, net	9,289,037	8,391,400
CASH AND CASH EQUIVALENTS (Note 22)	414,077	731,991
RESTRICTED CASH (Notes 4 and 22)	13,006	91,139
MARKETABLE SECURITIES (Notes 16 and 19)	27,475	27,481
CURRENT RECEIVABLES, NET (Notes 2 and 6)	14,386	12,007
DEFERRED RENT RECEIVABLES, NET (Notes 2 and 6)	405,665	386,658
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2, 3 and 5)	234,458	210,949
RIGHT OF USE GROUND LEASE ASSETS (Note 18)	127,302	95,523
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 7)	57,991	53,560
TOTAL ASSETS	10,583,397	10,000,708
LIABILITIES:
Secured debt, net (Notes 8, 9 and 19)	248,367	253,582
Unsecured debt, net (Notes 8, 9 and 19)	3,820,383	3,670,099
Accounts payable, accrued expenses and other liabilities (Note 18)	391,264	445,100
Ground lease liabilities (Note 18)	125,550	97,778
Accrued dividends and distributions (Notes 13 and 25)	61,850	59,431
Deferred revenue and acquisition-related intangible liabilities, net (Notes 2, 3, 5 and 10)	171,151	128,523
Rents received in advance and tenant security deposits	74,962	68,874
Total liabilities	4,893,527	4,723,387
COMMITMENTS AND CONTINGENCIES (Note 18)
CAPITAL:
Common units, 116,464,169 and 116,035,827 held by the general partner and 1,150,574 and 1,150,574 held by common limited partners issued and outstanding, respectively (Note 14)	5,493,806	5,079,818
Total partners’ capital	5,493,806	5,079,818
Noncontrolling interests in consolidated property partnerships and subsidiaries (Notes 2 and 12)	196,064	197,503
Total capital	5,689,870	5,277,321
TOTAL LIABILITIES AND EQUITY	$ 10,583,397	$ 10,000,708