Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Commercial real estate properties, at cost:
Land and land interests	$ 3,295,050	$ 3,309,710
Building and improvements	7,977,713	7,948,852
Building leasehold and improvements	1,439,083	1,437,325
Properties under capital lease	47,445	47,445
Total commercial real estate properties, at cost	12,759,291	12,743,332
Less: accumulated depreciation	(2,372,082)	(2,264,694)
Total commercial real estate properties, net	10,387,209	10,478,638
Assets held for sale	54,694	0
Cash and cash equivalents	468,035	279,443
Restricted cash	71,215	90,524
Investments in marketable securities	29,260	85,110
Tenant and other receivables, net of allowance of $16,634 and $16,592 in 2017 and 2016, respectively	52,197	53,772
Related party receivables	19,067	15,856
Deferred rents receivable, net of allowance of $24,079 and $25,203 in 2017 and 2016, respectively	453,747	442,179
Debt and preferred equity investments, net of discounts and deferred origination fees of $16,316 and $16,705 in 2017 and 2016, respectively	1,627,836	1,640,412
Investments in unconsolidated joint ventures	1,861,077	1,890,186
Deferred costs, net	267,948	267,600
Other assets	584,986	614,067
Total assets	15,877,271	15,857,787
Liabilities
Mortgages and other loans payable, net	4,167,270	4,073,830
Unsecured term loan, net	1,179,861	1,179,521
Unsecured Debt	1,132,354	1,128,315
Accrued interest payable	33,859	36,052
Other liabilities	162,964	206,238
Accounts payable and accrued expenses	169,244	190,583
Deferred revenue	235,208	217,955
Capital lease obligations	42,305	42,132
Deferred land leases payable	2,747	2,583
Dividend and distributions payable	87,617	87,271
Security deposits	66,807	66,504
Liabilities related to assets held for sale	43	0
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	7,380,279	7,330,984
Commitments and contingencies
Noncontrolling interests in Operating Partnership	491,298	473,882
Preferred units	302,010	302,010
Equity
Series I Preferred Stock, $0.01 par value, $25.00 liquidation preference, 9,200 issued and outstanding at both March 31, 2017 and December 31, 2016	221,932	221,932
Common stock, $0.01 par value, 160,000 shares authorized and 101,831 and 101,617 issued and outstanding at March 31, 2017 and December 31, 2016, respectively (including 1,055 shares held in treasury at March 31, 2017 and December 31, 2016)	1,019	1,017
Additional paid-in-capital	5,651,089	5,624,545
Treasury stock at cost	(124,049)	(124,049)
Accumulated other comprehensive income	16,511	22,137
Retained earnings	1,496,759	1,578,893
Total SL Green stockholders' equity	7,263,261	7,324,475
Noncontrolling interests in other partnerships	440,423	426,436
Total equity	7,703,684	7,750,911
SL Green stockholders equity:
Total liabilities and equity/capital	15,877,271	15,857,787
SL Green Operating Partnership
Commercial real estate properties, at cost:
Land and land interests	3,295,050	3,309,710
Building and improvements	7,977,713	7,948,852
Building leasehold and improvements	1,439,083	1,437,325
Properties under capital lease	47,445	47,445
Total commercial real estate properties, at cost	12,759,291	12,743,332
Less: accumulated depreciation	(2,372,082)	(2,264,694)
Total commercial real estate properties, net	10,387,209	10,478,638
Assets held for sale	54,694	0
Cash and cash equivalents	468,035	279,443
Restricted cash	71,215	90,524
Investments in marketable securities	29,260	85,110
Tenant and other receivables, net of allowance of $16,634 and $16,592 in 2017 and 2016, respectively	52,197	53,772
Related party receivables	19,067	15,856
Deferred rents receivable, net of allowance of $24,079 and $25,203 in 2017 and 2016, respectively	453,747	442,179
Debt and preferred equity investments, net of discounts and deferred origination fees of $16,316 and $16,705 in 2017 and 2016, respectively	1,627,836	1,640,412
Investments in unconsolidated joint ventures	1,861,077	1,890,186
Deferred costs, net	267,948	267,600
Other assets	584,986	614,067
Total assets	15,877,271	15,857,787
Liabilities
Mortgages and other loans payable, net	4,167,270	4,073,830
Unsecured term loan, net	1,179,861	1,179,521
Unsecured Debt	1,132,354	1,128,315
Accrued interest payable	33,859	36,052
Other liabilities	162,964	206,238
Accounts payable and accrued expenses	169,244	190,583
Deferred revenue	235,208	217,955
Capital lease obligations	42,305	42,132
Deferred land leases payable	2,747	2,583
Dividend and distributions payable	87,617	87,271
Security deposits	66,807	66,504
Liabilities related to assets held for sale	43	0
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	7,380,279	7,330,984
Commitments and contingencies
Noncontrolling interests in Operating Partnership	491,298	473,882
Limited partner interests in SLGOP (4,563 and 4,364 limited partner common units outstanding at March 31, 2017 and December 31, 2016, respectively)	491,298	473,882
Preferred units	302,010	302,010
Equity
Accumulated other comprehensive income	16,511	22,137
SL Green stockholders equity:
Series I Preferred Units, $25.00 liquidation preference, 9,200 issued and outstanding at both March 31, 2017 and December 31, 2016	221,932	221,932
SL Green partners' capital (1,053 and 1,049 general partner common units and 99,723 and 99,513 limited partner common units outstanding at March 31, 2017 and December 31, 2016, respectively)	7,024,818	7,080,406
Total SLGOP partners' capital	7,263,261	7,324,475
Noncontrolling interests in other partnerships	440,423	426,436
Total capital	7,703,684	7,750,911
Total liabilities and equity/capital	$ 15,877,271	$ 15,857,787