Noncontrolling Interests on the Company's Consolidated Financial Statements - Preferred Unit Activity (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Rollforward Analysis of Preferred Unit Activity | |||||
| Issuance of preferred units | $ 1,109 | $ 1,310 | $ 3,087 | $ 4,747 | |
| Redemption of preferred units | (15,631) | (15,631) | |||
| SL Green Operating Partnership | |||||
| Rollforward Analysis of Preferred Unit Activity | |||||
| Issuance of preferred units | 1,109 | $ 1,310 | 3,087 | 4,747 | |
| SL Green Operating Partnership | Preferred stock | |||||
| Rollforward Analysis of Preferred Unit Activity | |||||
| Balance at beginning of period | 168,560 | $ 164,210 | $ 164,210 | ||
| Issuance of preferred units | 5,800 | 4,320 | |||
| Redemption of preferred units | 0 | 0 | |||
| Dividends paid on preferred units | (3,850) | (6,200) | |||
| Accrued dividends on preferred units | 3,914 | 6,230 | |||
| Balance at end of period | $ 174,424 | $ 174,424 | $ 168,560 | ||