Consolidated Balance Sheets (KILROY REALTY, L.P.) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
REAL ESTATE ASSETS:
Land and improvements		$ 850,280	$ 877,633
Buildings and improvements		4,028,044	4,059,639
Undeveloped land and construction in progress (Note 2)		1,475,718	1,120,660
Total real estate assets held for investment		6,354,042	6,057,932
Accumulated depreciation and amortization		(999,557)	(947,664)
Total real estate assets held for investment, net ($176,947 and $211,755 of VIE, respectively, Note 1)		5,354,485	5,110,268
REAL ESTATE ASSETS AND OTHER ASSETS HELD FOR SALE, NET		0	8,211
CASH AND CASH EQUIVALENTS		567,940	23,781
RESTRICTED CASH (Note 1)		8,130	75,185
MARKETABLE SECURITIES (Note 12)		12,638	11,971
CURRENT RECEIVABLES, NET (Note 5)		11,533	7,229	[1],[2],[3]
DEFERRED RENT RECEIVABLES, NET (Note 5)		183,352	156,416
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Note 4)		173,457	201,926
DEFERRED FINANCING COSTS, NET		18,709	18,374
PREPAID EXPENSES AND OTHER ASSETS, NET		23,148	20,375
TOTAL ASSETS		6,353,392	5,633,736
LIABILITIES:
Secured debt (Notes 6 and 12)	[4]	475,923	546,292
Unsecured debt, net (Notes 6 and 12)		2,181,382	1,783,121
Unsecured line of credit (Notes 6 and 12)		0	140,000
Accounts payable, accrued expenses and other liabilities		249,980	225,830
Accrued distributions (Note 15)		34,993	32,899
Deferred revenue and acquisition-related intangible liabilities, net (Note 4)		127,473	132,239
Rents received in advance and tenant security deposits		46,579	49,363
Liabilities of real estate assets held for sale		0	56
Total liabilities		$ 3,116,330	$ 2,909,800
COMMITMENTS AND CONTINGENCIES (Note 11)
Partners’ Capital (Note 9):
TOTAL LIABILITIES AND EQUITY		$ 6,353,392	$ 5,633,736
Kilroy Realty, L.P. [Member]
REAL ESTATE ASSETS:
Land and improvements		850,280	877,633
Buildings and improvements		4,028,044	4,059,639
Undeveloped land and construction in progress (Note 2)		1,475,718	1,120,660
Total real estate assets held for investment		6,354,042	6,057,932
Accumulated depreciation and amortization		(999,557)	(947,664)
Total real estate assets held for investment, net ($176,947 and $211,755 of VIE, respectively, Note 1)		5,354,485	5,110,268
REAL ESTATE ASSETS AND OTHER ASSETS HELD FOR SALE, NET		0	8,211
CASH AND CASH EQUIVALENTS		567,940	23,781
RESTRICTED CASH (Note 1)		8,130	75,185
MARKETABLE SECURITIES (Note 12)		12,638	11,971
CURRENT RECEIVABLES, NET (Note 5)		11,533	7,229
DEFERRED RENT RECEIVABLES, NET (Note 5)		183,352	156,416
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Note 4)		173,457	201,926
DEFERRED FINANCING COSTS, NET		18,709	18,374
PREPAID EXPENSES AND OTHER ASSETS, NET		23,148	20,375
TOTAL ASSETS		6,353,392	5,633,736
LIABILITIES:
Secured debt (Notes 6 and 12)		475,923	546,292
Unsecured debt, net (Notes 6 and 12)		2,181,382	1,783,121
Unsecured line of credit (Notes 6 and 12)		0	140,000
Accounts payable, accrued expenses and other liabilities		249,980	225,830
Accrued distributions (Note 15)		34,993	32,899
Deferred revenue and acquisition-related intangible liabilities, net (Note 4)		127,473	132,239
Rents received in advance and tenant security deposits		46,579	49,363
Liabilities of real estate assets held for sale		0	56
Total liabilities		3,116,330	2,909,800
Partners’ Capital (Note 9):
Common units, 92,220,367 and 86,259,684 held by the general partner and 1,788,170 and 1,804,200 held by common limited partners issued and outstanding, respectively		3,034,341	2,521,900
Total partners’ capital		3,226,752	2,714,311
Noncontrolling interests in consolidated subsidiaries (Note 1)		10,310	9,625
Total capital		3,237,062	2,723,936
TOTAL LIABILITIES AND EQUITY		6,353,392	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] All interest rates presented are fixed-rate interest rates.

[2] 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.

[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] Amounts reported include the amounts of unamortized debt premiums of $7.2 million and $10.3 million as of September 30, 2015 and December 31, 2014, respectively.