Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS:
Investment properties, at cost	$ 36,393,464	$ 35,226,089
Less - accumulated depreciation	11,935,949	10,865,754
Investment properties at cost, net	24,457,515	24,360,335
Cash and cash equivalents	1,482,309	560,059
Tenant receivables and accrued revenue, net	742,672	664,619
Investment in unconsolidated entities, at equity	2,266,483	2,367,583
Investment in Klepierre, at equity	1,934,676	1,797,394
Deferred costs and other assets	1,373,983	1,353,588
Total assets	32,257,638	31,103,578
LIABILITIES:
Mortgages and unsecured indebtedness	24,632,463	22,977,104
Accounts payable, accrued expenses, intangibles, and deferred revenues	1,269,190	1,214,022
Cash distributions and losses in unconsolidated entities, at equity	1,406,378	1,359,738
Other liabilities	520,363	455,040
Total liabilities	27,828,394	26,005,904
Commitments and contingencies
Limited partners' preferred interest in the Operating Partnership and other noncontrolling redeemable interests in properties	190,480	137,762
Capital stock (850,000,000 total shares authorized, $ 0.0001 par value, 238,000,000 shares of excess common stock, 100,000,000 authorized shares of preferred stock):
Series J 8 3/8% cumulative redeemable preferred stock, 1,000,000 shares authorized, 796,948 issued and outstanding with a liquidation value of $39,847	43,077	43,405
Capital in excess of par value	9,614,748	9,523,086
Accumulated deficit	(4,782,173)	(4,459,387)
Accumulated other comprehensive loss	(110,453)	(114,126)
Common stock held in treasury, at cost, 9,163,920 and 6,756,748 shares, respectively	(1,079,063)	(682,562)
Total stockholders' equity	3,686,168	4,310,448
Noncontrolling interests	552,596	649,464
Total equity	4,238,764	4,959,912
Total liabilities and equity	32,257,638	31,103,578
Simon Property Group, L.P.
ASSETS:
Investment properties, at cost	36,393,464	35,226,089
Less - accumulated depreciation	11,935,949	10,865,754
Investment properties at cost, net	24,457,515	24,360,335
Cash and cash equivalents	1,482,309	560,059
Tenant receivables and accrued revenue, net	742,672	664,619
Investment in unconsolidated entities, at equity	2,266,483	2,367,583
Investment in Klepierre, at equity	1,934,676	1,797,394
Deferred costs and other assets	1,373,983	1,353,588
Total assets	32,257,638	31,103,578
LIABILITIES:
Mortgages and unsecured indebtedness	24,632,463	22,977,104
Accounts payable, accrued expenses, intangibles, and deferred revenues	1,269,190	1,214,022
Cash distributions and losses in unconsolidated entities, at equity	1,406,378	1,359,738
Other liabilities	520,363	455,040
Total liabilities	27,828,394	26,005,904
Commitments and contingencies
Limited partners' preferred interest in the Operating Partnership and other noncontrolling redeemable interests in properties	190,480	137,762
Capital stock (850,000,000 total shares authorized, $ 0.0001 par value, 238,000,000 shares of excess common stock, 100,000,000 authorized shares of preferred stock):
Preferred units, 796,948 units outstanding. Liquidation value of $39,847	43,077	43,405
General Partner, 311,166,854 and 313,074,574 units outstanding, respectively	3,643,091	4,267,043
Limited Partners, 46,879,625 and 47,276,095 units outstanding, respectively	548,858	644,348
Total partners' equity	4,235,026	4,954,796
Nonredeemable noncontrolling interests in properties, net	3,738	5,116
Total equity	4,238,764	4,959,912
Total liabilities and equity	32,257,638	31,103,578
Common stock
Capital stock (850,000,000 total shares authorized, $ 0.0001 par value, 238,000,000 shares of excess common stock, 100,000,000 authorized shares of preferred stock):
Common stock	32	32
Class B common stock
Capital stock (850,000,000 total shares authorized, $ 0.0001 par value, 238,000,000 shares of excess common stock, 100,000,000 authorized shares of preferred stock):
Common stock