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Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2024
Equity [Abstract] |
Schedule of accumulated other comprehensive income | The following tables set forth the changes in accumulated other comprehensive income by component as of December 31, 2024, 2023 and 2022 (in thousands):
| Net unrealized gain (loss) on derivative instruments (1) |  | SL Green's share of joint venture net unrealized (loss) gain on derivative instruments (2) |  | Net unrealized (loss) gain on marketable securities |  | Total
Balance at December 31, 2021 | $ | (25,881) |  |  | $ | (21,994) |  |  | $ | 1,117 |  |  | $ | (46,758) |
Other comprehensive income (loss) before reclassifications | 78,300 |  |  | 23,405 |  |  | (1,359) |  |  | 100,346 |
Amounts reclassified from accumulated other comprehensive income | (4,619) |  |  | 635 |  |  | — |  |  | (3,984) |
Balance at December 31, 2022 | 47,800 |  |  | 2,046 |  |  | (242) |  |  | 49,604 |
Other comprehensive (loss) income before reclassifications | 17,269 |  |  | 6,950 |  |  | (1,549) |  |  | 22,670 |
Amounts reclassified from accumulated other comprehensive income | (39,717) |  |  | (15,080) |  |  | — |  |  | (54,797) |
Balance at December 31, 2023 | 25,352 |  |  | (6,084) |  |  | (1,791) |  |  | 17,477 |
Other comprehensive income before reclassifications | 39,049 |  |  | 6,515 |  |  | 525 |  |  | 46,089 |
Amounts reclassified from accumulated other comprehensive income | (35,071) |  |  | (10,299) |  |  | — |  |  | (45,370) |
Balance at December 31, 2024 | $ | 29,330 |  |  | $ | (9,868) |  |  | $ | (1,266) |  |  | $ | 18,196 |
(1)Amount reclassified from accumulated other comprehensive income is included in interest expense in the respective consolidated statements of operations. As of December 31, 2024 and 2023, the deferred net gains from these terminated hedges, which is included in accumulated other comprehensive income relating to net unrealized gain (loss) on derivative instruments, was ($0.2 million) and ($0.4 million), respectively. (2)Amount reclassified from accumulated other comprehensive income is included in equity in net loss from unconsolidated joint ventures in the respective consolidated statements of operations.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
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