Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income	$ 545,863us-gaap_ProfitLoss	$ 151,283us-gaap_ProfitLoss	$ 209,700us-gaap_ProfitLoss
Other comprehensive income (loss):
Change in net unrealized gain on derivative instruments, including share of joint venture net unrealized gain on derivative instruments	10,643	13,490	2,127
Change in unrealized (loss) gain on marketable securities	(2,237)	1,497	(3,657)
Other comprehensive income (loss)	8,406	14,987	(1,530)
Comprehensive income	554,269	166,270	208,170
Net income attributable to noncontrolling interests	(27,807)	(15,912)	(13,295)
Other comprehensive (income) loss attributable to noncontrolling interests	(175)	(611)	388
Comprehensive income attributable to SL Green	526,287us-gaap_ComprehensiveIncomeNetOfTax	149,747us-gaap_ComprehensiveIncomeNetOfTax	195,263us-gaap_ComprehensiveIncomeNetOfTax
SL Green Operating Partnership
Net income	545,863	151,283	209,700
Other comprehensive income (loss):
Change in net unrealized gain on derivative instruments, including share of joint venture net unrealized gain on derivative instruments	10,643	13,490	2,127
Change in unrealized (loss) gain on marketable securities	(2,237)	1,497	(3,657)
Other comprehensive income (loss)	8,406	14,987	(1,530)
Comprehensive income	554,269	166,270	208,170
Net income attributable to noncontrolling interests	(6,590)	(10,629)	(5,591)
Comprehensive income attributable to SL Green	$ 547,679	$ 155,641	$ 202,579

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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