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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract] |
Schedule of ground lease arrangements | The table below summarizes our current lease arrangements as of December 31, 2023:
Property (1) | Year of Current Expiration | Year of Final Expiration (2)
711 Third Avenue (3) | 2033 | 2083
1185 Avenue of the Americas | 2043 | 2043
SL Green Headquarters at One Vanderbilt Avenue (4) | 2043 | 2048
420 Lexington Avenue | 2050 | 2080
SUMMIT One Vanderbilt | 2058 | 2070
15 Beekman (5)(6) | 2119 | 2119
(1)All leases are classified as operating leases unless otherwise specified. (2)Reflects exercise of all available extension options. (3)The Company owns 50% of the fee interest. (4)In March 2021, the Company commenced its lease for its corporate headquarters at One Vanderbilt Avenue. See note 10, "Related Party Transactions." (5)The Company has an option to purchase the ground lease for a fixed price on a specific date. The lease is classified as a financing lease. (6)In August 2020, the Company entered into a long-term sublease with an unconsolidated joint venture as part of the capitalization of the 15 Beekman development project. See Note 6, "Investments in Unconsolidated Joint Ventures."
Finance lease, liability, maturity | The following is a schedule of future minimum lease payments as evaluated in accordance with ASC 842 for our financing leases and operating leases with initial terms in excess of one year as of December 31, 2023 (in thousands):
| Financing leases |  | Operating leases
2024 | $ | 3,180 |  |  | $ | 53,455 |
2025 | 3,228 |  |  | 53,595 |
2026 | 3,276 |  |  | 53,734 |
2027 | 3,325 |  |  | 53,746 |
2028 | 3,375 |  |  | 54,211 |
Thereafter | 196,794 |  |  | 1,208,864 |
Total minimum lease payments | $ | 213,178 |  |  | $ | 1,477,605 |
Amount representing interest | (107,647) |  |  | — |
Amount discounted using incremental borrowing rate | — |  |  | (649,913) |
Total lease liabilities excluding liabilities related to assets held for sale | $ | 105,531 |  |  | $ | 827,692 |
Total lease liabilities | $ | 105,531 |  |  | $ | 827,692 |
Schedule of future minimum rental payments for operating leases | The following is a schedule of future minimum lease payments as evaluated in accordance with ASC 842 for our financing leases and operating leases with initial terms in excess of one year as of December 31, 2023 (in thousands):
| Financing leases |  | Operating leases
2024 | $ | 3,180 |  |  | $ | 53,455 |
2025 | 3,228 |  |  | 53,595 |
2026 | 3,276 |  |  | 53,734 |
2027 | 3,325 |  |  | 53,746 |
2028 | 3,375 |  |  | 54,211 |
Thereafter | 196,794 |  |  | 1,208,864 |
Total minimum lease payments | $ | 213,178 |  |  | $ | 1,477,605 |
Amount representing interest | (107,647) |  |  | — |
Amount discounted using incremental borrowing rate | — |  |  | (649,913) |
Total lease liabilities excluding liabilities related to assets held for sale | $ | 105,531 |  |  | $ | 827,692 |
Total lease liabilities | $ | 105,531 |  |  | $ | 827,692 |
Lease, cost | The following table provides lease cost information for the Company's operating leases for the years ended December 31, 2023, 2022 and 2021 (in thousands):
| Year Ended December 31,
Operating Lease Costs | 2023 |  | 2022 |  | 2021
Operating lease costs before capitalized operating lease costs | $ | 29,637 |  |  | $ | 33,773 |  |  | $ | 30,270 |
Operating lease costs capitalized | (2,345) |  |  | (6,830) |  |  | (3,716) |
Operating lease costs, net (1) | $ | 27,292 |  |  | $ | 26,943 |  |  | $ | 26,554 |
(1)This amount is included in Operating lease rent in our consolidated statements of operations. The following table provides lease cost information for the Company's financing leases for the years ended December 31, 2023, 2022 and 2021 (in thousands):
| Year Ended December 31,
Financing Lease Costs | 2023 |  | 2022 |  | 2021
Interest on financing leases before capitalized interest | $ | 4,446 |  |  | $ | 4,555 |  |  | $ | 5,448 |
Interest on financing leases capitalized | — |  |  | — |  |  | — |
Interest on financing leases, net (1) | 4,446 |  |  | 4,555 |  |  | 5,448 |
Amortization of right-of-use assets (2) | — |  |  | — |  |  | 660 |
Financing lease costs, net | $ | 4,446 |  |  | $ | 4,555 |  |  | $ | 6,108 |
(1)These amounts are included in Interest expense, net of interest income in our consolidated statements of operations. (2)These amounts are included in Depreciation and amortization in our consolidated statements of operations.

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- Definition Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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