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Investments In and Advances To Affiliates Consolidated Variable Interest Entity (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) ft² | Dec. 31, 2021 USD ($) ft² | Dec. 31, 2020 USD ($)
Consolidated Variable Interest Entity [Abstract] |  |  |
Rentable square feet of office property under development (in sq feet) | ft² |  | 600,000 |
Assets and liabilities of consolidated variable interest entity [Abstract] |  |  |
Net real estate assets |  | $ 5,032,033 | $ 4,421,285
Development in-process | $ 172,706 | 6,890 | 259,681
Cash and cash equivalents | $ 9,505 | 23,152 | 109,322
Accrued straight-line rents receivable |  | 268,324 | 259,381
Deferred leasing costs, net |  | 258,902 | 209,329
Prepaid expenses and other assets |  | 78,551 | 62,885
Accounts payable, accrued expenses and other liabilities |  | $ 294,976 | 268,727
Ownership Percentage [Member] |  |  |
Consolidated Variable Interest Entity [Abstract] |  |  |
Partner's interest in consolidated joint venture (in hundredths) |  | 50.00% |
Consolidated Variable Interest Entity [Member] |  |  |
Consolidated Variable Interest Entity [Abstract] |  |  |
Rentable square feet of office property under development (in sq feet) | ft² | 150,000 |  |
Total anticipated development costs | $ 71,300 |  |
Contribution of cash to acquire interest in joint venture | $ 20,000 |  |
Percentage of equity interest in consolidated affiliates | 80.00% |  |
Partner's contribution of property to acquire interest in joint venture | $ 5,000 |  |
Advance to affiliate | $ 46,300 |  |
Interest rate, basis spread (in hundredths) | 2.50% |  |
Amount of loan funded to affiliate |  | $ 28,500 |
Assets and liabilities of consolidated variable interest entity [Abstract] |  |  |
Net real estate assets |  | 53,191 | 0
Development in-process |  | 0 | 46,873
Cash and cash equivalents |  | 389 | 0
Accrued straight-line rents receivable |  | 121 | 0
Deferred leasing costs, net |  | 1,519 | 196
Prepaid expenses and other assets |  | 163 | 75
Accounts payable, accrued expenses and other liabilities |  | $ 646 | $ 2,693
Consolidated Variable Interest Entity [Member] | Ownership Percentage [Member] |  |  |
Consolidated Variable Interest Entity [Abstract] |  |  |
Partner's interest in consolidated joint venture (in hundredths) | 20.00% | 20.00% |
London Interbank Offered Rate (LIBOR) [Member] | Consolidated Variable Interest Entity [Member] |  |  |
Consolidated Variable Interest Entity [Abstract] |  |  |
Interest rate basis | LIBOR |  |

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