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Total distributions to each class of partners (i.e., general, limited and preferred partners).

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Consolidated Statement of Capital (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018	Jan. 01, 2018
Increase (Decrease) in Partner's Capital
DRSPP proceeds	$ 47	$ 42
Conversion of common units	446
Reallocation of noncontrolling interests in the operating partnership	(28,932)	3,645
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	4,835	3,102
Repurchases of common stock	(34,243)	(354,744)
Contribution to consolidated joint venture interests	161	157
Deconsolidation of partially owned entity		(314,596)
Cash distributions to noncontrolling interests	$ (208)	$ (276)
Common Stock
Increase (Decrease) in Partner's Capital
DRSPP proceeds (in shares)	1	1
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in shares)	(20)	(19)
Repurchases of common stock (in shares)	(398)	(3,654)
Repurchases of common stock	$ (4)	$ (37)
Contributions - proceeds from stock options exercised (in shares)		4
Noncontrolling Interests
Increase (Decrease) in Partner's Capital
Contribution to consolidated joint venture interests	161	$ 157
Deconsolidation of partially owned entity		(314,596)
Cash distributions to noncontrolling interests	(208)	(276)
SL Green Operating Partnership
Increase (Decrease) in Partner's Capital
Beginning Balance	5,947,855	6,589,454	$ 6,589,454
Adjusted Balance		7,159,978	7,159,978
Net income		105,702	47,767
Other comprehensive income		9,969	(19,113)
Preferred distributions		(3,738)	(3,738)
DRSPP proceeds		42	47
Conversion of common units			446
Reallocation of noncontrolling interests in the operating partnership		3,645	(28,932)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings		3,102	4,835
Repurchases of common stock		(354,744)	(34,243)
Contribution to consolidated joint venture interests		157	161
Deconsolidation of partially owned entity		(314,596)
Contributions - proceeds from stock options exercised		729
Cash distributions to noncontrolling interests		(276)	(208)
Cash distributions declared (per common unit, none of which represented a return of capital for federal income tax purposes)		(72,341)	(70,554)
Ending Balance	5,844,323	6,537,629	5,844,323
SL Green Operating Partnership \| Common Stock \| Partners' Interest
Increase (Decrease) in Partner's Capital
Beginning Balance	$ 5,664,481	$ 5,984,557	$ 5,984,557
Beginning Balance (units)	83,684	92,803	92,803
Adjusted Balance		$ 6,555,081	$ 6,555,081
Net income	$ 47,530	105,504
Preferred distributions		$ (3,738)	$ (3,738)
DRSPP proceeds (in shares)		1	1
DRSPP proceeds		$ 42	$ 47
Conversion of common units (in shares)			5
Conversion of common units			$ 446
Reallocation of noncontrolling interests in the operating partnership		$ 3,645	$ (28,932)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in shares)		(19)	(20)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings		$ 3,102	$ 4,835
Repurchases of common stock (in shares)		(3,654)	(398)
Repurchases of common stock		$ 354,744	$ (34,243)
Contributions - proceeds from stock options exercised (in shares)		4
Contributions - proceeds from stock options exercised		$ 729
Cash distributions declared (per common unit, none of which represented a return of capital for federal income tax purposes)		(72,341)	(70,554)
Ending Balance		$ 6,237,280	$ 5,579,872
Ending Balance (units)		89,135	83,272
SL Green Operating Partnership \| Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Partner's Capital
Beginning Balance	15,108	$ 18,604	$ 18,604
Adjusted Balance		18,604	18,604
Other comprehensive income		9,969	(19,113)
Ending Balance		28,573	(4,005)
SL Green Operating Partnership \| Noncontrolling Interests
Increase (Decrease) in Partner's Capital
Beginning Balance	46,334	364,361	364,361
Adjusted Balance		364,361	364,361
Net income	237	198
Contribution to consolidated joint venture interests		157	161
Deconsolidation of partially owned entity		(314,596)
Cash distributions to noncontrolling interests		(276)	(208)
Ending Balance		49,844	46,524
Series I Preferred Stock \| SL Green Operating Partnership \| Preferred Units
Increase (Decrease) in Partner's Capital
Beginning Balance	$ 221,932	221,932	221,932
Adjusted Balance		221,932	221,932
Ending Balance		$ 221,932	$ 221,932
Accounting Standards Update 2014-09
Increase (Decrease) in Partner's Capital
Cumulative adjustment upon adoption of ASC 610-20				$ 570,524
Accounting Standards Update 2014-09 \| SL Green Operating Partnership
Increase (Decrease) in Partner's Capital
Cumulative adjustment upon adoption of ASC 610-20				570,524
Accounting Standards Update 2014-09 \| SL Green Operating Partnership \| Common Stock \| Partners' Interest
Increase (Decrease) in Partner's Capital
Cumulative adjustment upon adoption of ASC 610-20				$ 570,524