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Supplemental Cash Flow Information of the Operating Partnership - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents	$ 510,163	$ 347,379	$ 414,077	$ 731,991
Restricted cash	0	0	13,006	91,139
Cash and cash equivalents and restricted cash	510,163	347,379	427,083	823,130
Kilroy Realty L.P.
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents	510,163	347,379	414,077	731,991
Restricted cash	0	0	13,006	91,139
Cash and cash equivalents and restricted cash	$ 510,163	$ 347,379	$ 427,083	$ 823,130

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