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Partners' Capital of the Operating Partnership - Additional Information (Details) - shares | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Common Stock |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |
Units outstanding (units) | 65,235,000 | 64,814,000 | 64,726,000 | 64,398,000 | 64,387,000 | 64,380,000
SL Green Operating Partnership |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |
Number of units of operating partnership owned by the noncontrolling interest unit holders (units) | 4,474,406 |  | 3,949,448 |  |  |
SL Green Operating Partnership | Operating Partnership |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |
Noncontrolling interest in the operating partnership (as a percent) | 6.42% |  | 5.75% |  |  |
SL Green Operating Partnership | Common Stock |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |
Shares, issued (in shares) | 65,235,013 |  |  |  |  |
Units outstanding (units) | 65,235,013 |  |  |  |  |
SL Green Operating Partnership | Series I Preferred Units |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |
Units outstanding (units) | 9,200,000 |  |  |  |  |
Period of restriction to redeem OP Units | 1 year |  |  |  |  |
Conversion of stock, shares issued | 1 |  |  |  |  |

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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-5 + Details
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- Definition Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 + Details
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