Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 118,457	$ 549,187	$ 153,614	$ 643,078
Other comprehensive income (loss):
Net unrealized gain (loss) on derivative instruments	(11)	(3,940)	303	(2,991)
SL Green's share of joint venture net unrealized gain (loss) on derivative instruments	(3,637)	888	(836)	3,389
Unrealized gain (loss) on marketable securities	(542)	(5,719)	228	566
Other comprehensive income (loss)	(4,190)	(8,771)	(305)	964
Comprehensive income	114,267	540,416	153,309	644,042
Comprehensive income attributable to noncontrolling interests	(7,720)	(14,989)	(9,892)	(20,538)
Comprehensive income attributable to SL Green common stockholders	$ 106,547	$ 525,427	$ 143,417	$ 623,504