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Lessee - Leases Narrative (Details) $ in Thousands |  |  | 1 Months Ended | 12 Months Ended | 21 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 14, 2023 USD ($) ft² a | Aug. 01, 2023 USD ($) ft² | Dec. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2023 USD ($) | Dec. 13, 2023
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Number of Properties Subject to Ground Leases |  |  |  | 5 | 5 | 4 | 4 |  |
Lessee, Operating Lease, Option to Terminate |  |  |  |  | one cancelable and four non-cancelable ground lease obligations | four non-cancelable | four non-cancelable |  |
Operating Lease, Payments |  |  |  |  | $ 121 | $ (125) | $ 23,599 |  |
Operating Lease, Right-of-Use Asset | [1] |  |  | $ 324,298 | 324,298 | 167,351 |  |  |
Operating Lease, Liability |  |  |  | 350,391 | 350,391 | 204,686 |  |  |
Operating lease costs | [2] |  |  |  | 14,451 | 12,700 | 13,151 |  |
Lease liabilities - finance leases |  |  |  | 417,961 | 417,961 | 249,335 |  |  |
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability |  |  |  |  | 163,056 | 0 | 0 |  |
Interest on lease liabilities | [3] |  |  |  | 13,747 | 3,236 | $ 2,471 |  |
Finance Lease, Right-of-Use Asset |  |  |  | 401,680 | 401,680 | $ 237,510 |  |  |
Lessee, Operating Lease, Variable Lease Payment, Terms and Conditions |  |  |  |  |  | no ground leases were subject to variable payments | no ground leases were subject to variable payments |  |
Lessee, Operating Lease, Option to Extend |  |  |  |  |  | no ground leases were subject to variable payments and extension options | no ground leases were subject to variable payments and extension options |  |
Santa Monica Business Park [Member] |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Ownership Percentage | [4] |  |  |  |  | 55.00% |  |  |
Joint Venture Partner [Member] | Santa Monica Business Park [Member] |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Ownership Percentage |  | 45.00% |  |  |  |  |  |  |
343 Madison Avenue | Consolidated Entities |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Consolidated Entities, Ownership Percentage |  |  | 55.00% |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract |  |  | 99 years |  |  |  |  |  |
Operating Leases, Future Minimum Payments, Due in Two Years |  |  | $ 21,800 |  |  |  |  |  |
Operating Leases, Future Minimum Payments, Due in Five Years |  |  | $ 10,900 |  |  |  |  |  |
Lessee, Operating Lease Payment Increase (Decrease) Term, Year |  |  | 5 years |  |  |  |  |  |
Lessee, Operating Lease Payment Increase (Decrease), Percentage |  |  | 1.10 |  |  |  |  |  |
Lessee, Operating Lease, Discount Rate |  |  | 8.14% |  |  |  |  |  |
Net Present Value and Operating Lease Liability |  |  | $ 141,100 |  |  |  |  |  |
Operating Lease, Payments |  |  |  |  | 10,000 | $ 15,000 |  | $ 25,000 |
Operating lease costs |  |  |  |  | $ 12,600 |  |  |  |
Finance Lease, Right-of-Use Asset |  |  | $ 166,800 |  |  |  |  |  |
Land Subject to Ground Leases | ft² |  |  | 25,000 |  |  |  |  |  |
343 Madison Avenue | Consolidated Entities | Scenario, Plan |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Recovery of Direct Costs |  |  | $ 117,000 |  |  |  |  |  |
343 Madison Avenue | Consolidated Entities | Construction | Scenario, Plan |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  |  | 900,000 |  |  |  |  |  |
Santa Monica Business Park [Member] |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Land subject to ground lease, percentage |  | 70.00% |  |  |  |  |  |  |
Lessee, Finance Lease, Number of Renewal Terms |  | 4 |  |  |  |  |  |  |
Lessee, Finance Lease, Renewal Term |  | 11 years |  |  |  |  |  |  |
Lessee, Finance Lease, Option to Extend |  | The ground lease has an expiration date of February 4, 2054 with the option to renew the term for four additional periods of 11 years each, subject to certain conditions. |  |  |  |  |  |  |
Lessee, finance lease, payment increase (decrease) frequency (in years) |  | 5 years |  |  |  |  |  |  |
Lessee, Finance Lease, Variable Lease Payment, Terms and Conditions |  | The ground lease requires monthly rental payments with increases every five years, starting in 2028. |  |  |  |  |  |  |
Lessee, finance lease, purchase option frequency (in years) |  | 15 years |  |  |  |  |  |  |
Lease liabilities - finance leases |  | $ 163,100 |  |  |  |  |  |  |
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability |  | $ 164,100 |  |  |  |  |  |  |
Interest on lease liabilities |  |  |  | $ 400 |  |  |  |  |
Lessee, Finance Lease, Discount Rate |  | 5.79% |  |  |  |  |  |  |
Land Subject to Ground Leases | a |  | 47 |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  | 1,200,000 |  |  |  |  |  |  |
Santa Monica Business Park [Member] | Ground Lease |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Lease Intangibles |  | $ (46,659) |  |  |  |  |  |  |
Santa Monica Business Park [Member] | Ground Lease | Unconsolidated Properties |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Lease Intangibles |  | $ 46,700 |  |  |  |  |  |  |
Santa Monica Business Park [Member] | Santa Monica Business Park [Member] | Unconsolidated Properties |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Ownership Percentage |  |  |  |  |  |  |  |  | 55.00%
[1] | See Note 4.
[2] | One of the operating leases relate to assets under development for a portion of the year ended December 31, 2023 and as such, the operating lease costs were capitalized. For December 31, 2022 and 2021, no operating leases related to assets under development.
[3] | One, one and two of the finance leases relate to assets under development for all or a portion of the years ended December 31, 2023, December 31, 2022 and December 31, 2021, respectively, and as such, a portion of the interest amount was capitalized.
[4] | During the year ended December 31, 2023, the Company completed the acquisition of its joint venture partner’s 45% ownership interest in Santa Monica Business Park, as described below in this Note 6 and Note 3.

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