v3.26.1
Consolidated Statements of Capital - USD ($)
shares in Thousands, $ 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
Increase (Decrease) in Partner's Capital          
DRSPP proceeds $ 83 $ 56 $ 145 $ 131  
Measurement adjustment for redeemable noncontrolling interest (53,962) (9,955) (76,863) (22,895)  
Deferred compensation plan and unit awards, net of forfeitures and tax withholdings 7,079 5,982 8,750 3,457  
Proceeds from issuance of common stock 0     (871)  
Repurchases of common units (14,068)   (14,068)    
Contributions to consolidated joint venture interests 1,109 1,310 3,087 4,747  
Consolidation of joint venture interest     38,421    
Contributions to debt fund investments 127,367 24,193 209,092 24,193  
Cash distributions to noncontrolling interests (213) $ (1,380) (8,533) $ (1,601)  
Distributions from debt fund investments $ (2,962)   $ (4,784)    
Common Stock          
Increase (Decrease) in Partner's Capital          
DRSPP proceeds (in shares) 2 1 3 2  
DRSPP proceeds        
Conversion of common units (shares) 3 1 4 5  
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in units) 7 7 (30) (79)  
Deferred compensation plan and unit awards, net of forfeitures and tax withholdings $ (2)     $ (1)  
Repurchases of common units (in units) 283   (283)    
Repurchases of common units $ (4)   $ (4)    
Noncontrolling Interests          
Increase (Decrease) in Partner's Capital          
Deferred compensation plan and unit awards, net of forfeitures and tax withholdings 467   933    
Contributions to consolidated joint venture interests 1,109 $ 1,310 3,087 4,747  
Consolidation of joint venture interest     38,421    
Contributions to debt fund investments 127,367 24,193 209,092 24,193  
Cash distributions to noncontrolling interests (213) (1,380) (8,533) (1,601)  
Distributions from debt fund investments (2,962)   (4,784)    
SL Green Operating Partnership          
Increase (Decrease) in Partner's Capital          
Beginning balance 3,897,798 3,953,427 3,912,448 4,069,951 $ 4,069,951
Net loss (13,149) (8,970) (92,746) (32,669)  
Net income (loss) attributable to partnership units 2,155 775 8,833 2,240  
Acquisition of subsidiary interest from noncontrolling interest   (15,631)   (15,631)  
Other comprehensive (loss) income 12,640 (11,482) 27,551 (34,520)  
Perpetual preferred unit dividends (3,737) (3,737) (7,475) (7,475)  
DRSPP proceeds 83 56 145 131  
Measurement adjustment for redeemable noncontrolling interest (53,962) (9,955) (76,863) (22,895)  
Deferred compensation plan and unit awards, net of forfeitures and tax withholdings 7,079 5,982 8,750 3,457  
Proceeds from issuance of common stock       (871)  
Repurchases of common units (14,068)   (14,068)    
Contributions to consolidated joint venture interests 1,109 1,310 3,087 4,747  
Consolidation of joint venture interest     38,421    
Contributions to debt fund investments 127,367 24,193 209,092    
Cash distributions to noncontrolling interests (213) (1,380) (8,533) (1,601)  
Distributions from debt fund investments (2,962)   (4,784) 24,193  
Issuance of special distribution paid in units     0    
Cash distributions declared (43,550) (54,485) (87,268) (108,954)  
Ending balance 3,916,590 3,880,103 3,916,590 3,880,103 3,912,448
SL Green Operating Partnership | Series I Preferred Units | Series I Preferred Stock          
Increase (Decrease) in Partner's Capital          
Beginning balance 221,932 221,932 221,932 221,932 221,932
Ending balance 221,932 221,932 221,932 221,932 221,932
SL Green Operating Partnership | Common Stock | Partners' Interest          
Increase (Decrease) in Partner's Capital          
Beginning balance $ 3,321,678 $ 3,619,367 $ 3,471,421 $ 3,711,172 $ 3,711,172
Beginning balance (units) 71,124 71,016 71,159 71,097 71,097
Net loss $ (24,921) $ (8,130) $ (112,252) $ (26,932)  
Net income (loss) attributable to partnership units 2,155 775 8,833 2,240  
Acquisition of subsidiary interest from noncontrolling interest   36,023   36,023  
Perpetual preferred unit dividends $ (3,737) $ (3,737) $ (7,475) $ (7,475)  
DRSPP proceeds (in shares) 2 1 3 2  
DRSPP proceeds $ 83 $ 56 $ 145 $ 131  
Conversion of common units (shares) 3 1 4 5  
Measurement adjustment for redeemable noncontrolling interest $ (53,962) $ (9,955) $ (76,863) $ (22,895)  
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in units) 7 7 (30) (79)  
Deferred compensation plan and unit awards, net of forfeitures and tax withholdings $ 6,612 $ 5,982 $ 7,817 $ 3,457  
Proceeds from issuance of common stock       (871)  
Repurchases of common units (in units) (283)   (283)    
Repurchases of common units $ (14,068)   $ (14,068)    
Cash distributions declared (43,550) (54,485) (87,268) (108,954)  
Ending balance $ 3,190,290 $ 3,585,896 $ 3,190,290 $ 3,585,896 $ 3,471,421
Ending balance (units) 70,853 71,025 70,853 71,025 71,159
SL Green Operating Partnership | Accumulated Other Comprehensive Income (Loss)          
Increase (Decrease) in Partner's Capital          
Beginning balance $ (7,287) $ (4,842) $ (22,198) $ 18,196 $ 18,196
Other comprehensive (loss) income 12,640 (11,482) 27,551 (34,520)  
Ending balance 5,353 (16,324) 5,353 (16,324) (22,198)
SL Green Operating Partnership | Noncontrolling Interests          
Increase (Decrease) in Partner's Capital          
Beginning balance 361,475 116,970 241,293 118,651 118,651
Net loss 11,772 (840) 19,506 (5,737)  
Acquisition of subsidiary interest from noncontrolling interest   (51,654)   (51,654)  
Deferred compensation plan and unit awards, net of forfeitures and tax withholdings 467   933    
Contributions to consolidated joint venture interests 1,109 1,310 3,087 4,747  
Consolidation of joint venture interest     38,421    
Contributions to debt fund investments 127,367 24,193 209,092    
Cash distributions to noncontrolling interests (213) (1,380) (8,533) (1,601)  
Distributions from debt fund investments (2,962)   (4,784) 24,193  
Ending balance $ 499,015 $ 88,599 $ 499,015 $ 88,599 $ 241,293