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v3.22.1

Variable Interest Entities (Details) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2021 USD ($) ft² | Dec. 31, 2019 USD ($) ft² | Mar. 31, 2022 USD ($) ft² | Mar. 31, 2021 USD ($)
Variable Interest Entities [Line Items] |  |  |  |
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 | $ 5,032,033,000 |  | $ 5,004,488,000 |
Cash and cash equivalents | 23,152,000 |  | 18,669,000 | $ 49,279,000
Accounts receivable | 14,002,000 |  | 17,888,000 |
Accrued straight-line rents receivable | 268,324,000 |  | 275,133,000 |
Deferred leasing costs, net | 258,902,000 |  | 252,207,000 |
Prepaid expense and other assets, net | 78,551,000 |  | 81,153,000 |
Accounts payable, accrued expenses and other liabilities | $ 294,976,000 |  | 250,128,000 |
Variable Interest Entity, Non Primary Beneficiary [Member] |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |
Rentable square feet of office property under development (in sq feet) | ft² | 135,000 |  |  |
Total anticipated development costs | $ 79,000,000 |  |  |
Contribution of cash to acquire interest in joint venture | $ 13,300,000 |  |  |
Interest in joint venture (in hundredths) | 50.00% |  |  |
Advance to affiliate | $ 49,600,000 |  |  |
Amount of loan funded to affiliate |  |  | 0 |
Term of optional extension | 1 year |  |  |
Risk of loss limited to carrying value |  |  | 13,500,000 |
Variable Interest Entity, Non Primary Beneficiary [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |
Variable interest rate basis | LIBOR |  |  |
Interest rate, basis spread (in hundredths) | 3.00% |  |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |
Rentable square feet of office property under development (in sq feet) | ft² |  | 150,000 |  |
Total anticipated development costs |  | $ 71,300,000 |  |
Contribution of cash to acquire interest in joint venture |  | $ 20,000,000 |  |
Interest in joint venture (in hundredths) |  | 80.00% |  |
Advance to affiliate |  | $ 46,300,000 |  |
Amount of loan funded to affiliate |  |  | 30,100,000 |
Assets and liabilities of consolidated variable interest entity [Abstract] |  |  |  |
Net real estate assets | $ 53,191,000 |  | 55,061,000 |
Cash and cash equivalents | 389,000 |  | 885,000 |
Accounts receivable | 0 |  | 229,000 |
Accrued straight-line rents receivable | 121,000 |  | 145,000 |
Deferred leasing costs, net | 1,519,000 |  | 1,511,000 |
Prepaid expense and other assets, net | 163,000 |  | 172,000 |
Accounts payable, accrued expenses and other liabilities | 646,000 |  | $ 1,728,000 |
Variable Interest Entity, Primary Beneficiary [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |
Variable interest rate basis |  | LIBOR |  |
Interest rate, basis spread (in hundredths) |  | 2.50% |  |
Variable Interest Entity, Partner Interest [Member] |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |
Partner's interest in joint venture (in hundredths) |  |  | 20.00% |
Variable Interest Entity, Partner Interest [Member] | Variable Interest Entity, Non Primary Beneficiary [Member] |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |
Contribution of cash to acquire interest in joint venture | 5,600,000 |  |  |
Partner's contribution of property to acquire interest in joint venture | $ 7,700,000 |  |  |
Partner's interest in joint venture (in hundredths) | 50.00% |  |  |
Variable Interest Entity, Partner Interest [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |
Partner's contribution of property to acquire interest in joint venture |  | $ 5,000,000 |  |
Partner's interest in joint venture (in hundredths) |  | 20.00% |  |

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