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Supplemental Cash Flow Information of the Operating Partnership - Supplemental Cash Flow (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
SUPPLEMENTAL CASH FLOWS INFORMATION: |  |  |
Capitalized interest | $ 75,802 | $ 75,852 | $ 77,666
Cash paid for interest, net of capitalized interest of $75,802, $75,852, and $77,666 as of December 31, 2021, 2020 and 2019, respectively | 77,028 | 61,741 | 43,607
Cash paid for amounts included in the measurement of ground lease liabilities | 6,209 | 5,744 | 5,224
NON-CASH INVESTING TRANSACTIONS: |  |  |
Accrual for expenditures for operating properties and development and redevelopment properties | 119,829 | 189,161 | 162,654
Tenant improvements funded directly by tenants | 20,070 | 11,592 | 10,268
Assumption of accrued liabilities in connection with acquisitions (Note 3) | 37,572 | 0 | 10,267
Initial measurement of operating right of use ground lease assets (Notes 3 and 18) | 46,430 | 0 | 96,272
Initial measurement of operating ground lease liabilities (Notes 3 and 18) | 46,430 | 0 | 98,349
NON-CASH FINANCING TRANSACTIONS: |  |  |
Accrual of distributions payable to common unitholders (Notes 14 and 25) | 61,850 | 59,431 | 53,219
Kilroy Realty L.P. |  |  |
SUPPLEMENTAL CASH FLOWS INFORMATION: |  |  |
Capitalized interest | 75,802 | 75,852 | 77,666
Cash paid for interest, net of capitalized interest of $75,802, $75,852, and $77,666 as of December 31, 2021, 2020 and 2019, respectively | 77,028 | 61,741 | 43,607
Cash paid for amounts included in the measurement of ground lease liabilities | 6,209 | 5,744 | 5,224
NON-CASH INVESTING TRANSACTIONS: |  |  |
Accrual for expenditures for operating properties and development and redevelopment properties | 119,829 | 189,161 | 162,654
Tenant improvements funded directly by tenants | 20,070 | 11,592 | 10,268
Assumption of accrued liabilities in connection with acquisitions (Note 3) | 37,572 | 0 | 10,267
Initial measurement of operating right of use ground lease assets (Notes 3 and 18) | 46,430 | 0 | 96,272
Initial measurement of operating ground lease liabilities (Notes 3 and 18) | 46,430 | 0 | 98,349
NON-CASH FINANCING TRANSACTIONS: |  |  |
Accrual of distributions payable to common unitholders (Notes 14 and 25) | $ 61,850 | $ 59,431 | $ 53,219

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