Consolidated Statements of Operations (KILROY REALTY, L.P.) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
REVENUES:
Rental income	$ 112,056	$ 101,607
Tenant reimbursements	11,572	9,130
Other property income (Note 12)	2,157	227
Total revenues	125,785	110,964
EXPENSES:
Property expenses	25,094	22,805
Real estate taxes	11,173	9,664
Provision for bad debts	0	95
Ground leases	762	847
General and administrative expenses	10,811	9,669
Acquisition-related expenses	228	655
Depreciation and amortization	49,202	47,701
Total expenses	97,270	91,436
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (Note 11)	177	392
Interest expense (Note 5)	(17,252)	(19,734)
Total other (expenses) income	(17,075)	(19,342)
INCOME FROM CONTINUING OPERATIONS	11,440	186
DISCONTINUED OPERATIONS (Note 13)
Income from discontinued operations	377	2,202
Net gain on dispositions of discontinued operations	90,115	0
Total income from discontinued operations	90,492	2,202
NET INCOME	101,932	2,388
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION	99,845	2,410
Preferred dividends	(3,313)	(3,313)
NET INCOME (LOSS) AVAILABLE TO COMMON STOCKHOLDERS	96,532	(903)
Income (loss) from continuing operations available to common unitholders per common unit - basic (Note 15)	$ 0.09	$ (0.05)
Income (loss) from continuing operations available to common unitholders per common unit - diluted (Note 15)	$ 0.09	$ (0.05)
Net income (loss) available to common unitholders per unit-basic (Note 14)	$ 1.17	$ (0.02)
Net income (loss) available to common unitholders per unit-diluted (Note 14)	$ 1.14	$ (0.02)
Weighted average common units outstanding - basic (Note 14)	82,124,538	74,977,240
Weighted average common units outstanding - diluted (Note 14)	84,140,070	74,977,240
Kilroy Realty, L.P. [Member]
REVENUES:
Rental income	112,056	101,607
Tenant reimbursements	11,572	9,130
Other property income (Note 12)	2,157	227
Total revenues	125,785	110,964
EXPENSES:
Property expenses	25,094	22,805
Real estate taxes	11,173	9,664
Provision for bad debts	0	95
Ground leases	762	847
General and administrative expenses	10,811	9,669
Acquisition-related expenses	228	655
Depreciation and amortization	49,202	47,701
Total expenses	97,270	91,436
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (Note 11)	177	392
Interest expense (Note 5)	(17,252)	(19,734)
Total other (expenses) income	(17,075)	(19,342)
INCOME FROM CONTINUING OPERATIONS	11,440	186
DISCONTINUED OPERATIONS (Note 13)
Income from discontinued operations	377	2,202
Net gain on dispositions of discontinued operations	90,115	0
Total income from discontinued operations	90,492	2,202
NET INCOME	101,932	2,388
Net income attributable to noncontrolling interests in consolidated subsidiaries	(65)	(69)
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION	101,867	2,319
Preferred dividends	(3,313)	(3,313)
NET INCOME (LOSS) AVAILABLE TO COMMON STOCKHOLDERS	$ 98,554	$ (994)
Income (loss) from continuing operations available to common unitholders per common unit - basic (Note 15)	$ 0.09	$ (0.05)
Income (loss) from continuing operations available to common unitholders per common unit - diluted (Note 15)	$ 0.09	$ (0.05)
Net income (loss) available to common unitholders per unit-basic (Note 14)	$ 1.17	$ (0.02)
Net income (loss) available to common unitholders per unit-diluted (Note 14)	$ 1.14	$ (0.02)
Weighted average common units outstanding - basic (Note 14)	83,928,993	76,803,743
Weighted average common units outstanding - diluted (Note 14)	85,944,525	76,803,743
Dividends declared per common unit	$ 0.35	$ 0.35