Consolidated Balance Sheets (KILROY REALTY, L.P.) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
REAL ESTATE ASSETS:
Land and improvements (Note 2)	$ 757,036		$ 657,491
Buildings and improvements (Note 2)	3,882,015		3,590,699
Undeveloped land and construction in progress (Note 2)	1,112,046		1,016,757
Total real estate assets held for investment	5,751,097		5,264,947
Accumulated depreciation and amortization	(912,623)		(818,957)
Total real estate assets held for investment, net ($98,121 and $234,532 of VIE, respectively, Note 1)	4,838,474		4,445,990
REAL ESTATE ASSETS AND OTHER ASSETS HELD FOR SALE, NET (Note 13)	49,815		213,100
CASH AND CASH EQUIVALENTS	200,431		35,377
RESTRICTED CASH (Notes 1 and 13)	17,487		49,780
MARKETABLE SECURITIES (Note 11)	12,076		10,008
CURRENT RECEIVABLES, NET (Note 4)	6,443	[1]	10,743
DEFERRED RENT RECEIVABLES, NET (Note 4)	139,910	[2]	127,123
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2 and 3)	183,057		186,622
DEFERRED FINANCING COSTS, NET	19,373		16,502
PREPAID EXPENSES AND OTHER ASSETS, NET	20,398		15,783
TOTAL ASSETS	5,487,464		5,111,028
LIABILITIES:
Secured debt (Notes 5 and 11)	549,896	[3]	560,434	[3]
Exchangeable senior notes, net (Notes 5 and 11)	135,049		168,372
Unsecured debt, net (Notes 5 and 11)	1,743,962		1,431,132
Unsecured line of credit (Notes 5 and 11)	0		45,000
Accounts payable, accrued expenses and other liabilities	243,602		198,467
Accrued distributions (Note 16)	31,897		31,490
Deferred revenue and acquisition-related intangible liabilities, net (Notes 2 and 3)	114,504		101,286
Rents received in advance and tenant security deposits	45,086		44,240
Liabilities of real estate assets held for sale (Note 13)	3,099		14,447
Total liabilities	2,867,095		2,594,868
COMMITMENTS AND CONTINGENCIES (Note 10)
Partners’ Capital (Note 8):
TOTAL LIABILITIES AND EQUITY	5,487,464		5,111,028
Kilroy Realty, L.P. [Member]
REAL ESTATE ASSETS:
Land and improvements (Note 2)	757,036		657,491
Buildings and improvements (Note 2)	3,882,015		3,590,699
Undeveloped land and construction in progress (Note 2)	1,112,046		1,016,757
Total real estate assets held for investment	5,751,097		5,264,947
Accumulated depreciation and amortization	(912,623)		(818,957)
Total real estate assets held for investment, net ($98,121 and $234,532 of VIE, respectively, Note 1)	4,838,474		4,445,990
REAL ESTATE ASSETS AND OTHER ASSETS HELD FOR SALE, NET (Note 13)	49,815		213,100
CASH AND CASH EQUIVALENTS	200,431		35,377
RESTRICTED CASH (Notes 1 and 13)	17,487		49,780
MARKETABLE SECURITIES (Note 11)	12,076		10,008
CURRENT RECEIVABLES, NET (Note 4)	6,443		10,743
DEFERRED RENT RECEIVABLES, NET (Note 4)	139,910		127,123
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2 and 3)	183,057		186,622
DEFERRED FINANCING COSTS, NET	19,373		16,502
PREPAID EXPENSES AND OTHER ASSETS, NET	20,398		15,783
TOTAL ASSETS	5,487,464		5,111,028
LIABILITIES:
Secured debt (Notes 5 and 11)	549,896		560,434
Exchangeable senior notes, net (Notes 5 and 11)	135,049		168,372
Unsecured debt, net (Notes 5 and 11)	1,743,962		1,431,132
Unsecured line of credit (Notes 5 and 11)	0		45,000
Accounts payable, accrued expenses and other liabilities	243,602		198,467
Accrued distributions (Note 16)	31,897		31,490
Deferred revenue and acquisition-related intangible liabilities, net (Notes 2 and 3)	114,504		101,286
Rents received in advance and tenant security deposits	45,086		44,240
Liabilities of real estate assets held for sale (Note 13)	3,099		14,447
Total liabilities	2,867,095		2,594,868
Partners’ Capital (Note 8):
Common units, 83,388,220 and 82,153,944 held by the general partner and 1,804,200 and 1,805,200 held by common limited partners issued and outstanding, respectively	2,419,033		2,315,361
Total partners’ capital	2,611,444		2,507,772
Noncontrolling interests in consolidated subsidiaries (Notes 1 and 6)	8,925		8,388
Total capital	2,620,369		2,516,160
TOTAL LIABILITIES AND EQUITY	5,487,464		5,111,028
Series G Cumulative Redeemable Preferred Unit [Member] | Kilroy Realty, L.P. [Member]
Partners’ Capital (Note 8):
Redeemable Preferred stock	96,155		96,155
Series H Cumulative Redeemable Preferred Unit [Member] | Kilroy Realty, L.P. [Member]
Partners’ Capital (Note 8):
Redeemable Preferred stock	$ 96,256		$ 96,256

[1] Excludes current receivables, net related to properties held for sale at September 30, 2014.

[2] Excludes deferred rent receivables, net related to properties held for sale at September 30, 2014.

[3] Amounts reported include the amounts of unamortized debt premiums and discounts for the periods presented.