Consolidated Balance Sheets (KILROY REALTY, L.P.) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
REAL ESTATE ASSETS
Land and improvements	$ 1,160,138	$ 1,076,172
Buildings and improvements	5,207,984	4,908,797
Undeveloped land and construction in progress	2,058,510	1,432,808
Total real estate assets held for investment	8,426,632	7,417,777
Accumulated depreciation and amortization	(1,391,368)	(1,264,162)
Total real estate assets held for investment, net	7,035,264	6,153,615
CASH AND CASH EQUIVALENTS	51,604	57,649
RESTRICTED CASH	119,430	9,149
MARKETABLE SECURITIES	21,779	20,674
CURRENT RECEIVABLES, NET	20,176	16,926
DEFERRED RENT RECEIVABLES, NET	267,007	246,391
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET	197,574	183,728
PREPAID EXPENSES AND OTHER ASSETS, NET	52,873	114,706
TOTAL ASSETS	7,765,707	6,802,838
LIABILITIES:
Secured debt, net	335,531	340,800
Unsecured debt, net	2,552,070	2,006,263
Unsecured line of credit	45,000	0
Accounts payable, accrued expenses and other liabilities	374,415	249,637
Accrued distributions	47,559	43,448
Deferred revenue and acquisition-related intangible liabilities, net	149,646	145,890
Rents received in advance and tenant security deposits	60,225	56,484
Total liabilities	3,564,446	2,842,522
COMMITMENTS AND CONTINGENCIES
Partners’ Capital:
TOTAL LIABILITIES AND EQUITY/CAPITAL	7,765,707	6,802,838
Kilroy Realty L.P. [Member]
REAL ESTATE ASSETS
Land and improvements	1,160,138	1,076,172
Buildings and improvements	5,207,984	4,908,797
Undeveloped land and construction in progress	2,058,510	1,432,808
Total real estate assets held for investment	8,426,632	7,417,777
Accumulated depreciation and amortization	(1,391,368)	(1,264,162)
Total real estate assets held for investment, net	7,035,264	6,153,615
CASH AND CASH EQUIVALENTS	51,604	57,649
RESTRICTED CASH	119,430	9,149
MARKETABLE SECURITIES	21,779	20,674
CURRENT RECEIVABLES, NET	20,176	16,926
DEFERRED RENT RECEIVABLES, NET	267,007	246,391
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET	197,574	183,728
PREPAID EXPENSES AND OTHER ASSETS, NET	52,873	114,706
TOTAL ASSETS	7,765,707	6,802,838
LIABILITIES:
Secured debt, net	335,531	340,800
Unsecured debt, net	2,552,070	2,006,263
Unsecured line of credit	45,000	0
Accounts payable, accrued expenses and other liabilities	374,415	249,637
Accrued distributions	47,559	43,448
Deferred revenue and acquisition-related intangible liabilities, net	149,646	145,890
Rents received in advance and tenant security deposits	60,225	56,484
Total liabilities	3,564,446	2,842,522
COMMITMENTS AND CONTINGENCIES
Partners’ Capital:
Common units, 100,746,988 and 98,620,333 held by the general partner and 2,025,287 and 2,077,193 held by common limited partners issued and outstanding, respectively	4,003,700	3,773,941
Total partners’ capital	4,003,700	3,773,941
Noncontrolling interests in consolidated property partnerships and subsidiaries (Notes 2 and 12)	197,561	186,375
Total capital	4,201,261	3,960,316
TOTAL LIABILITIES AND EQUITY/CAPITAL	$ 7,765,707	$ 6,802,838