CONSOLIDATED STATEMENTS OF CASH FLOWS (KILROY REALTY, L.P.) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 238,288	$ 259,493	$ 658,910
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	348,064	350,665	303,799
Depreciation of non-real estate furniture, fixtures and equipment	7,214	6,946	6,244
Revenue reversals (recoveries) for doubtful accounts, net (Notes 2 and 18)	11,553	(123)	1,433
Non-cash amortization of share-based compensation awards (Note 16)	36,858	28,347	33,800
Non-cash amortization of deferred financing costs and net debt discounts	5,200	3,657	2,831
Non-cash amortization of net below market rents (Note 7)	(6,648)	(10,476)	(6,904)
Gains on sales of depreciable operating properties (Note 4)	0	(17,329)	(463,128)
Loss on early extinguishment of debt (Note 10)	0	0	12,246
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements (Note 11)	(19,181)	(19,321)	(17,247)
Straight-line rents	(19,262)	(46,231)	(53,745)
Amortization of right of use ground lease assets	1,024	772	1,241
Net change in other operating assets	2,322	(12,606)	(6,077)
Net change in other operating liabilities	(2,843)	48,441	43,000
Net cash provided by operating activities	602,589	592,235	516,403
CASH FLOWS FROM INVESTING ACTIVITIES:
Investments in certificates of deposit (Note 5)	(256,581)	0	0
Expenditures for development and redevelopment properties and undeveloped land	(446,426)	(453,774)	(552,837)
Expenditures for operating properties and other capital assets	(97,393)	(92,802)	(120,611)
Expenditures for acquisitions of development properties and undeveloped land (Note 3)	0	(40,033)	(586,927)
Net proceeds received from dispositions (Note 4)	0	33,416	1,048,927
Expenditures for acquisitions of operating properties	0	0	(537,429)
Decrease in acquisition-related deposits	0	0	1,000
Net cash used in investing activities	(800,400)	(553,193)	(747,877)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments and repayments of secured debt (Note 10)	(5,775)	(5,555)	(5,341)
Borrowings on unsecured debt (Note 10)	320,000	200,000	0
Proceeds from the issuance of secured debt (Note 10)	375,000	0	0
Repurchases of unsecured debt (Note 10)	(20,584)	0	0
Net proceeds from the issuance of unsecured debt (Note 10)	0	0	449,807
Repayments of unsecured debt (Note 10)	0	0	(312,105)
Financing costs (Note 10)	(10,924)	(6,432)	(12,032)
Proceeds from exercise of stock options	0	0	383
Repurchase of common stock and restricted stock units (Note 16)	(11,595)	(22,934)	(21,888)
Distributions to noncontrolling interests in consolidated property partnerships	(30,097)	(36,269)	(27,601)
Distributions paid to common unitholders	(255,430)	(247,556)	(237,355)
Contributions from noncontrolling interests in consolidated property partnerships	0	0	1,559
Net cash provided by (used in) financing activities	360,595	(118,746)	(164,573)
Net increase (decrease) in cash and cash equivalents and restricted cash	162,784	(79,704)	(396,047)
Cash and cash equivalents and restricted cash, beginning of year	347,379	427,083	823,130
Cash and cash equivalents and restricted cash, end of year	510,163	347,379	427,083
Kilroy Realty L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	238,288	259,493	658,910
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	348,064	350,665	303,799
Depreciation of non-real estate furniture, fixtures and equipment	7,214	6,946	6,244
Revenue reversals (recoveries) for doubtful accounts, net (Notes 2 and 18)	11,553	(123)	1,433
Non-cash amortization of share-based compensation awards (Note 16)	36,858	28,347	33,800
Non-cash amortization of deferred financing costs and net debt discounts	5,200	3,657	2,831
Non-cash amortization of net below market rents (Note 7)	(6,648)	(10,476)	(6,904)
Gains on sales of depreciable operating properties (Note 4)	0	(17,329)	(463,128)
Loss on early extinguishment of debt (Note 10)	0	0	12,246
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements (Note 11)	(19,181)	(19,321)	(17,247)
Straight-line rents	(19,262)	(46,231)	(53,745)
Amortization of right of use ground lease assets	1,024	772	1,241
Net change in other operating assets	2,322	(12,606)	(6,077)
Net change in other operating liabilities	(2,843)	48,441	43,000
Net cash provided by operating activities	602,589	592,235	516,403
CASH FLOWS FROM INVESTING ACTIVITIES:
Investments in certificates of deposit (Note 5)	(256,581)	0	0
Expenditures for development and redevelopment properties and undeveloped land	(446,426)	(453,774)	(552,837)
Expenditures for operating properties and other capital assets	(97,393)	(92,802)	(120,611)
Expenditures for acquisitions of development properties and undeveloped land (Note 3)	0	(40,033)	(586,927)
Net proceeds received from dispositions (Note 4)	0	33,416	1,048,927
Expenditures for acquisitions of operating properties	0	0	(537,429)
Decrease in acquisition-related deposits	0	0	1,000
Net cash used in investing activities	(800,400)	(553,193)	(747,877)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments and repayments of secured debt (Note 10)	(5,775)	(5,555)	(5,341)
Borrowings on unsecured debt (Note 10)	320,000	200,000	0
Net proceeds from the issuance of unsecured debt (Note 10)	0	0	449,807
Repayments of unsecured debt (Note 10)	0	0	(312,105)
Financing costs (Note 10)	(10,924)	(6,432)	(12,032)
Proceeds from exercise of stock options	0	0	383
Repurchase of common stock and restricted stock units (Note 16)	(11,595)	(22,934)	(21,888)
Distributions to noncontrolling interests in consolidated property partnerships	(30,097)	(36,269)	(27,601)
Distributions paid to common unitholders	(255,430)	(247,556)	(237,355)
Contributions from noncontrolling interests in consolidated property partnerships	0	0	1,559
Net cash provided by (used in) financing activities	360,595	(118,746)	(164,573)
Net increase (decrease) in cash and cash equivalents and restricted cash	162,784	(79,704)	(396,047)
Cash and cash equivalents and restricted cash, beginning of year	347,379	427,083	823,130
Cash and cash equivalents and restricted cash, end of year	$ 510,163	$ 347,379	$ 427,083