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v3.23.2

Subsequent Events (Details) $ in Thousands | Aug. 01, 2023 ft² | Jul. 28, 2023 USD ($) ft² Integer | Jul. 27, 2023 USD ($) | Jul. 20, 2023 ft² | Jun. 30, 2023
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Office Tower Developer LLC |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Ownership Percentage |  |  |  |  | 50.00%
Subsequent Event [Member] | 140 Kendrick Street - Building A |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Net Rentable Area (in sf) |  |  |  | 104,000 |
Subsequent Event [Member] | 100 Causeway Street [Member] | Unconsolidated Properties |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Net Rentable Area (in sf) |  | 634,000 |  |  |
Leased percentage |  | 95.00% |  |  |
Subsequent Event [Member] | 100 Causeway Street [Member] | Office Tower Developer LLC |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Ownership Percentage |  | 50.00% |  |  |
Subsequent Event [Member] | 100 Causeway Street [Member] | Construction Loans |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Debt | $ |  | $ 336,600 | $ 340,600 |  |
Extension Option (in years) | Integer |  | 1 |  |  |
Repayments of Construction Loans Payable | $ |  | $ 4,000 |  |  |
Subsequent Event [Member] | 100 Causeway Street [Member] | Construction Loans | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Debt Instrument, Description of Variable Rate Basis |  | Term SOFR | Term SOFR |  |
Debt Instrument, Basis Spread on Variable Rate |  | 1.48% | 1.60% |  |
Subsequent Event [Member] | 100 Causeway Street [Member] | Extended Maturity | Construction Loans |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Fiscal Period Duration |  | 1 year |  |  |
Subsequent Event [Member] | 343 Madison Avenue |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Ownership Percentage |  | 55.00% |  |  |
Subsequent Event [Member] | 343 Madison Avenue | Unconsolidated Properties |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Net Rentable Area (in sf) |  | 900,000 |  |  |
Subsequent Event [Member] | 343 Madison Avenue | Ground Lease Term of Contract | Unconsolidated Properties |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Fiscal Period Duration | 99 years |  |  |  |
Land Subject to Ground Leases | 25,000 |  |  |  |
Subsequent Event [Member] | Unconsolidated Joint Ventures [Member] | 343 Madison Avenue |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Ownership Percentage |  | 45.00% |  |  |

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