Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Commercial real estate properties, at cost:
Land and land interests	$ 3,309,710	$ 4,779,159
Building and improvements	7,948,852	10,423,739
Building leasehold and improvements	1,437,325	1,431,259
Properties under capital lease	47,445	47,445
Total commercial real estate properties, at cost	12,743,332	16,681,602
Less: accumulated depreciation	(2,264,694)	(2,060,706)
Total commercial real estate properties, net	10,478,638	14,620,896
Assets held for sale	0	34,981
Cash and cash equivalents	279,443	255,399
Restricted cash	90,524	233,578
Investments in marketable securities	85,110	45,138
Tenant and other receivables, net of allowance of $16,592 and $17,618 in 2016 and 2015, respectively	53,772	63,491
Related party receivables	15,856	10,650
Deferred rents receivable, net of allowance of $25,203 and $21,730 in 2016 and 2015, respectively	442,179	498,776
Debt and preferred equity investments, net of discounts and deferred origination fees of $16,705 and $18,759 in 2016 and 2015, respectively	1,640,412	1,670,020
Investments in unconsolidated joint ventures	1,890,186	1,203,858
Deferred costs, net	267,600	239,920
Other assets	614,067	850,939
Total assets	15,857,787	19,727,646
Liabilities
Mortgages and other loans payable, net	4,073,830	6,881,920
Revolving credit facility, net	0	985,055
Unsecured term loan, net	1,179,521	929,514
Unsecured notes, net	1,128,315	1,378,964
Accrued interest payable	36,052	42,406
Other liabilities	206,238	168,477
Accounts payable and accrued expenses	190,583	196,213
Deferred revenue	217,955	399,102
Capital lease obligations	42,132	41,360
Deferred land leases payable	2,583	1,783
Dividend and distributions payable	87,271	79,790
Security deposits	66,504	68,023
Liabilities related to assets held for sale	0	29,000
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	7,330,984	11,301,607
Commitments and contingencies
Noncontrolling interests in Operating Partnership	473,882	424,206
Preferred units	302,010	282,516
Equity
Series I Preferred Stock, $0.01 par value, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2016 and 2015	221,932	221,932
Common stock, $0.01 par value, 160,000 shares authorized and 101,617 and 100,063 issued and outstanding at December 31, 2016 and 2015, respectively (including 1,055 and 87 shares held in treasury at December 31, 2016 and 2015, respectively)	1,017	1,001
Additional paid-in-capital	5,624,545	5,439,735
Treasury stock at cost	(124,049)	(10,000)
Accumulated other comprehensive income (loss)	22,137	(8,749)
Retained earnings	1,578,893	1,643,546
Total SL Green stockholders' equity	7,324,475	7,287,465
Noncontrolling interests in other partnerships	426,436	431,852
Total equity	7,750,911	7,719,317
SL Green stockholders equity:
Total liabilities and equity/capital	15,857,787	19,727,646
SL Green Operating Partnership
Commercial real estate properties, at cost:
Land and land interests	3,309,710	4,779,159
Building and improvements	7,948,852	10,423,739
Building leasehold and improvements	1,437,325	1,431,259
Properties under capital lease	47,445	47,445
Total commercial real estate properties, at cost	12,743,332	16,681,602
Less: accumulated depreciation	(2,264,694)	(2,060,706)
Total commercial real estate properties, net	10,478,638	14,620,896
Assets held for sale	0	34,981
Cash and cash equivalents	279,443	255,399
Restricted cash	90,524	233,578
Investments in marketable securities	85,110	45,138
Tenant and other receivables, net of allowance of $16,592 and $17,618 in 2016 and 2015, respectively	53,772	63,491
Related party receivables	15,856	10,650
Deferred rents receivable, net of allowance of $25,203 and $21,730 in 2016 and 2015, respectively	442,179	498,776
Debt and preferred equity investments, net of discounts and deferred origination fees of $16,705 and $18,759 in 2016 and 2015, respectively	1,640,412	1,670,020
Investments in unconsolidated joint ventures	1,890,186	1,203,858
Deferred costs, net	267,600	239,920
Other assets	614,067	850,939
Total assets	15,857,787	19,727,646
Liabilities
Mortgages and other loans payable, net	4,073,830	6,881,920
Revolving credit facility, net	0	985,055
Unsecured term loan, net	1,179,521	929,514
Unsecured notes, net	1,128,315	1,378,964
Accrued interest payable	36,052	42,406
Other liabilities	206,238	168,477
Accounts payable and accrued expenses	190,583	196,213
Deferred revenue	217,955	399,102
Capital lease obligations	42,132	41,360
Deferred land leases payable	2,583	1,783
Dividend and distributions payable	87,271	79,790
Security deposits	66,504	68,023
Liabilities related to assets held for sale	0	29,000
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	7,330,984	11,301,607
Commitments and contingencies
Preferred units	302,010	282,516
Equity
Accumulated other comprehensive income (loss)	22,137	(8,749)
SL Green stockholders equity:
Limited partner interests in SLGOP (4,364 and 3,746 limited partner common units outstanding at December 31, 2016 and 2015, respectively)	473,882	424,206
Series I Preferred Units, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2016 and 2015	221,932	221,932
SL Green partners' capital (1,049 and 1,035 general partner common units, and 99,513 and 98,941 limited partner common units outstanding at December 31, 2016 and 2015, respectively)	7,080,406	7,074,282
Total SLGOP partners' capital	7,324,475	7,287,465
Noncontrolling interests in other partnerships	426,436	431,852
Total capital	7,750,911	7,719,317
Total liabilities and equity/capital	$ 15,857,787	$ 19,727,646