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Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2023
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, 2023, 2022 and 2021 (in thousands):
| Net unrealized gain (loss) on derivative instruments (1) |  | SL Green’s share of joint venture net unrealized gain (loss) on derivative instruments (2) |  | Net unrealized (loss) gain on marketable securities |  | Total
Balance at December 31, 2020 | $ | (57,415) |  |  | $ | (10,853) |  |  | $ | 1,021 |  |  | $ | (67,247) |
Other comprehensive income (loss) before reclassifications | 14,908 |  |  | (18,015) |  |  | 96 |  |  | (3,011) |
Amounts reclassified from accumulated other comprehensive loss | 16,626 |  |  | 6,874 |  |  | — |  |  | 23,500 |
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 |
(1)Amount reclassified from accumulated other comprehensive income is included in interest expense in the respective consolidated statements of operations. As of December 31, 2023 and 2022, 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 ($0.4 million) and ($0.5 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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