Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues
Rental revenue, net	$ 264,349	$ 277,676	$ 804,104	$ 798,271
Escalation and reimbursement	45,091	42,194	125,018	124,273
Investment and preferred equity income	44,448	27,869	143,887	87,655
Other income	9,877	9,272	21,369	25,931
Total revenues	363,765	357,011	1,094,378	1,036,130
Expenses
Operating expenses, including approximately $4,876 and $13,345 (2013) and $4,670 and $12,914 (2012) paid to related parties	77,272	82,351	218,901	221,670
Real estate taxes	55,511	53,293	161,625	156,746
Ground rent	10,127	8,874	29,767	26,570
Interest expense, net of interest income	82,973	85,659	247,420	247,789
Amortization of deferred financing costs	4,331	4,493	13,034	11,626
Depreciation and amortization	87,473	81,827	248,587	233,566
Loan loss and other investment reserves, net of recoveries	0	0	0	564
Transaction related costs, net of recoveries	(2,349)	1,372	719	4,398
Marketing, general and administrative	20,869	20,551	63,450	61,469
Total expenses	336,207	338,420	983,503	964,398
Income from continuing operations before equity in net income from unconsolidated joint ventures, equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate, gain (loss) on sale of investment in marketable securities, purchase price fair value adjustment and loss on early extinguishment of debt	27,558	18,591	110,875	71,732
Equity in net income from unconsolidated joint ventures	2,939	11,658	4,251	80,988
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(354)	(4,807)	(3,937)	17,776
Gain (loss) on sale of investment in marketable securities	0	2,237	(65)	2,237
Purchase price fair value adjustment	0	0	(2,305)	0
Loss on early extinguishment of debt	0	0	(18,523)	0
Income from continuing operations	30,143	27,679	90,296	172,733
Net income from discontinued operations	1,406	951	1,725	2,883
Gain on sale of discontinued operations	13,787	0	14,900	6,627
Net income	45,336	28,630	106,921	182,243
Net income attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	(1,110)	(567)	(1,909)	(4,876)
Noncontrolling interests in other partnerships	(2,901)	(1,835)	(8,806)	(6,792)
Preferred unit distributions	(562)	(571)	(1,692)	(1,533)
Net income attributable to SL Green	40,763	25,657	94,514	169,042
Preferred stock redemption costs	0	(10,010)	(12,160)	(10,010)
Perpetual preferred stock dividends	(3,738)	(7,915)	(18,144)	(23,004)
Net income attributable to SL Green common stockholders	37,025	7,732	64,210	136,028
Amounts attributable to SL Green common stockholders:
Income from continuing operations	22,623	11,451	54,125	109,687
Purchase price fair value adjustment	0	0	(2,239)	0
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(344)	(4,636)	(3,825)	17,160
Net income from discontinued operations	1,365	917	1,676	2,783
Gain on sale of discontinued operations	13,381	0	14,473	6,398
Net income	37,025	7,732	64,210	136,028
Basic earnings per share:
Income from continuing operations before discontinued operations (in dollars per share)	$ 0.25	$ 0.13	$ 0.57	$ 1.24
Gain (Loss) on Sale of Unconsolidated Joint Ventures or Real Estate, Per Basic Share	$ 0.00	$ (0.05)	$ (0.04)	$ 0.19
Net (loss) income from discontinued operations (in dollars per share)	$ 0.00	$ 0.01	$ 0.01	$ 0.03
Gain (Loss) on Sale of Discontinued Operations, Net of Noncontrolling Interest, Per Basic Share	$ 0.15	$ 0.00	$ 0.16	$ 0.07
Net income attributable to SL Green common stockholders (in dollars per share)	$ 0.40	$ 0.09	$ 0.70	$ 1.53
Diluted earnings per share:
Net income from continuing operations before discontinued operations (in dollars per share)	$ 0.25	$ 0.13	$ 0.56	$ 1.23
Gain (Loss) on Sale of Unconsolidated Joint Ventures or Real Estate, Per Diluted Share	$ 0.00	$ (0.05)	$ (0.04)	$ 0.19
Net (loss) income from discontinued operations (in dollars per share)	$ 0.00	$ 0.01	$ 0.02	$ 0.03
Gain (Loss) on Sale of Discontinued Operations, Per Diluted Share	$ 0.15	$ 0.00	$ 0.16	$ 0.07
Income attributable to SL Green common stockholders (in dollars per share)	$ 0.40	$ 0.09	$ 0.70	$ 1.52
Dividends per share (in dollars per share)	$ 0.33	$ 0.25	$ 0.99	$ 0.75
Basic weighted average common shares outstanding (in shares)	91,988	90,241	91,684	88,929
Diluted weighted average common shares and common share equivalents outstanding (in shares)	95,016	93,891	94,631	92,485
Amounts attributable to SLGOP common unitholders:
Purchase price fair value adjustment			(2,305)	0
SL Green Operating Partnership
Revenues
Rental revenue, net	264,349	277,676	804,104	798,271
Escalation and reimbursement	45,091	42,194	125,018	124,273
Investment and preferred equity income	44,448	27,869	143,887	87,655
Other income	9,877	9,272	21,369	25,931
Total revenues	363,765	357,011	1,094,378	1,036,130
Expenses
Operating expenses, including approximately $4,876 and $13,345 (2013) and $4,670 and $12,914 (2012) paid to related parties	77,272	82,351	218,901	221,670
Real estate taxes	55,511	53,293	161,625	156,746
Ground rent	10,127	8,874	29,767	26,570
Interest expense, net of interest income	82,973	85,659	247,420	247,789
Amortization of deferred financing costs	4,331	4,493	13,034	11,626
Depreciation and amortization	87,473	81,827	248,587	233,566
Loan loss and other investment reserves, net of recoveries	0	0	0	564
Transaction related costs, net of recoveries	(2,349)	1,372	719	4,398
Marketing, general and administrative	20,869	20,551	63,450	61,469
Total expenses	336,207	338,420	983,503	964,398
Income from continuing operations before equity in net income from unconsolidated joint ventures, equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate, gain (loss) on sale of investment in marketable securities, purchase price fair value adjustment and loss on early extinguishment of debt	27,558	18,591	110,875	71,732
Equity in net income from unconsolidated joint ventures	2,939	11,658	4,251	80,988
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(354)	(4,807)	(3,937)	17,776
Gain (loss) on sale of investment in marketable securities	0	2,237	(65)	2,237
Purchase price fair value adjustment	0	0	(2,305)	0
Loss on early extinguishment of debt	0	0	(18,523)	0
Income from continuing operations	30,143	27,679	90,296	172,733
Net income from discontinued operations	1,406	951	1,725	2,883
Gain on sale of discontinued operations	13,787	0	14,900	6,627
Net income	45,336	28,630	106,921	182,243
Net income attributable to noncontrolling interests:
Noncontrolling interests in other partnerships	(2,901)	(1,835)	(8,806)	(6,792)
Net income attributable to SL Green	41,873	26,224	96,423	173,918
Amounts attributable to SL Green common stockholders:
Income from continuing operations	23,296	12,155	55,736	113,618
Gain on sale of discontinued operations	13,787	0	14,900	6,627
Basic earnings per share:
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate (in dollars per share)	0.00	(0.05)	(0.04)	0.19
Gain on sale of discontinued operations (in dollars per share)	0.15	0.00	0.16	0.07
Diluted earnings per share:
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate (in dollars per share)	0.00	(0.05)	(0.04)	0.19
Gain on sale of discontinued operations (in dollars per share)	0.15	0.00	0.16	0.07
Amounts attributable to SLGOP common unitholders:
Purchase price fair value adjustment	0	0	(2,305)	0
Preferred unit distributions	(562)	(571)	(1,692)	(1,533)
Preferred unit redemption costs	0	(10,010)	(12,160)	(10,010)
Perpetual preferred unit distributions	(3,738)	(7,915)	(18,144)	(23,004)
Net income attributable to SLGOP common unitholders	38,135	8,299	66,119	140,904
Net income from discontinued operations	$ 1,406	$ 951	$ 1,725	$ 2,883
Net income from continuing operations before discontinued operations (usd per share)	0.25	0.13	0.57	1.24
Net income from discontinued operations (usd per share)	0.00	0.01	0.01	0.03
Net Income attributable to SLGOP common unitholders (usd per share)	0.40	0.09	0.70	1.53
Net income from continuing operations before discontinued operations (usd per share)	0.25	0.13	0.56	1.23
Net income from discontinued operations (usd per share)	0.00	0.01	0.02	0.03
Net income attributable to SLGOP common unitholders (usd per share)	0.40	0.09	0.70	1.52
Dividends per unit (usd per share)	$ 0.33	$ 0.25	$ 0.99	$ 0.75
Basic weighted average common units outstanding (shares)	94,780	93,561	94,389	92,117
Diluted weighted average common units and common unit equivalents outstanding (shares)	95,016	93,891	94,631	92,485