Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Tenant and other receivables, allowance	$ 12,369	$ 15,702
Deferred rents receivable, allowance	12,477	15,457
Debt and preferred equity investments, net of discounts and deferred origination fees	14,562	22,379
Allowance for loan and lease losses	$ 1,750	$ 5,750
Preferred stock, par (in dollars per share)	$ 0.01
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Common stock, shares issued (in shares)	80,258,000	84,739,000
Common stock, shares outstanding (in shares)	80,258,000	84,739,000
Treasury stock, shares (in shares)	1,055,000	1,055,000
Land	$ 1,751,544	$ 1,774,899
Building and improvements	5,154,990	5,268,484
Building leasehold and improvements	1,433,793	1,423,107
Right of use asset - financing leases	47,445	47,445
Accumulated depreciation	2,060,560	2,099,137
Other assets	332,801	295,679
Real estate debt	2,183,253	1,961,240
Accrued interest payable	22,148	23,154
Lease liabilities	44,448	43,616
Other liabilities	177,080	116,566
SL Green Operating Partnership
Tenant and other receivables, allowance	12,369	15,702
Deferred rents receivable, allowance	12,477	15,457
Debt and preferred equity investments, net of discounts and deferred origination fees	14,562	22,379
Allowance for loan and lease losses	$ 1,750	$ 5,750
Limited partner interests in Operating Partnership, limited partner common units outstanding (shares)	4,196,000	4,131,000
SL Green partner's capital, general partner common units outstanding (shares)	834,000	878,000
SL Green partners' capital, limited partner common units outstanding (shares)	78,368,000	82,806,000
Land	$ 1,751,544	$ 1,774,899
Building and improvements	5,154,990	5,268,484
Building leasehold and improvements	1,433,793	1,423,107
Right of use asset - financing leases	47,445	47,445
Accumulated depreciation	2,060,560	2,099,137
Other assets	332,801	295,679
Real estate debt	2,183,253	1,961,240
Accrued interest payable	22,148	23,154
Lease liabilities	44,448	43,616
Other liabilities	177,080	116,566
Consolidated VIEs | SL Green Operating Partnership
Land	205,200	110,000
Building and improvements	481,900	346,700
Building leasehold and improvements	2,000	2,000
Right of use asset - financing leases	61,700	47,400
Accumulated depreciation	17,600	42,200
Other assets	169,500	112,600
Real estate debt	457,100	140,800
Accrued interest payable	1,200	400
Lease liabilities	57,700	43,600
Other liabilities	$ 43,700	$ 18,300
Series I Preferred Stock
Preferred stock, par (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred stock, shares issued (in shares)	9,200,000	9,200,000
Preferred stock, shares outstanding (in shares)	9,200,000	9,200,000
Series I Preferred Stock | SL Green Operating Partnership
Preferred units, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred units, shares issued (in shares)	9,200,000	9,200,000
Preferred units, shares outstanding (in shares)	9,200,000	9,200,000