Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt and preferred equity investments, net of discounts and deferred origination fees	$ 11,232	$ 14,562
Allowance for loan and lease losses	$ 13,213	$ 1,750
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)	69,534,000	77,981,000
Common stock, shares outstanding (in shares)	69,534,000	77,981,000
Treasury stock, shares (in shares)	1,026,000	1,026,000
Land	$ 1,315,832	$ 1,751,544
Building and improvements	4,168,193	5,154,990
Building leasehold and improvements	1,448,134	1,433,793
Right of use asset - financing leases	55,711	47,445
Accumulated depreciation	1,956,077	2,060,560
Other assets	448,213	332,801
Real estate debt	1,979,972	2,183,253
Accrued interest payable	14,825	22,148
Lease liabilities	152,521	44,448
Other liabilities	302,798	177,080
SL Green Operating Partnership
Debt and preferred equity investments, net of discounts and deferred origination fees	11,232	14,562
Allowance for loan and lease losses	$ 13,213	$ 1,750
Limited partner interests in Operating Partnership, limited partner common units outstanding (shares)	3,939,000	4,196,000
SL Green partner's capital, general partner common units outstanding (shares)	724,000	812,000
SL Green partners' capital, limited partner common units outstanding (shares)	67,784,000	76,145,000
Land	$ 1,315,832	$ 1,751,544
Building and improvements	4,168,193	5,154,990
Building leasehold and improvements	1,448,134	1,433,793
Right of use asset - financing leases	55,711	47,445
Accumulated depreciation	1,956,077	2,060,560
Other assets	448,213	332,801
Real estate debt	1,979,972	2,183,253
Accrued interest payable	14,825	22,148
Lease liabilities	152,521	44,448
Other liabilities	$ 302,798	$ 177,080
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