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Supplemental Cash Flow Information of the Company - Supplemental Cash Flow (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2019
SUPPLEMENTAL CASH FLOWS INFORMATION: |  |  |  |
Cash paid for interest, net of capitalized interest of $75,852, $77,666, and $65,627 as of December 31, 2020, 2019 and 2018, respectively | $ 61,741 | $ 43,607 | $ 44,697 |
Capitalized interest | 75,852 | 77,666 | 65,627 |
Cash paid for amounts included in the measurement of ground lease liabilities | 5,744 | 5,224 |  |
Cash paid for amounts included in the measurement of ground lease liabilities |  |  | 4,398 |
NON-CASH INVESTING TRANSACTIONS: |  |  |  |
Accrual for expenditures for operating properties and development properties | 189,161 | 162,654 | 158,626 |
Tenant improvements funded directly by tenants | 11,592 | 10,268 | 13,968 |
Assumption of other assets and liabilities in connection with operating and development property acquisitions, net (Note 3) | 0 | 10,267 | 40,624 |
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18) | 95,523 | 96,348 |  | $ 96,272
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18) | 97,778 | 98,400 |  | $ 98,349
NON-CASH FINANCING TRANSACTIONS: |  |  |  |
Accrual of dividends and distributions payable to common stockholders and common unitholders (Notes 13 and 27) | 59,431 | 53,219 | 47,559 |
Exchange of common units of the Operating Partnership into shares of the Company’s common stock | $ 37,640 | $ 78 | $ 1,962 |

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