CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Real estate:
Buildings and improvements	$ 11,149,249	$ 11,048,433
Development costs and construction in progress	642,879	613,182
Land	1,865,806	1,867,278
Accumulated depreciation and amortization	(2,508,986)	(2,409,135)
Net real estate	11,148,948	11,119,758
Net investment in direct financing leases	44,706	44,706
Loans receivable, net of reserves of $14,134 and $10,280	740,142	195,375
Investments in and advances to unconsolidated joint ventures	399,841	402,871
Accounts receivable, net of allowance of $3,884 and $3,994	38,879	42,269
Cash and cash equivalents	34,007	44,226
Restricted cash	68,033	67,206
Intangible assets, net	495,919	519,917
Assets held for sale and discontinued operations, net	1,374,507	2,626,306
Right-of-use asset, net	198,426	192,349
Other assets, net	650,518	665,106
Total assets	15,193,926	15,920,089
LIABILITIES AND EQUITY
Bank line of credit and commercial paper	1,038,150	129,590
Term loan	249,243	249,182
Senior unsecured notes	4,255,697	5,697,586
Mortgage debt	219,959	221,621
Intangible liabilities, net	138,617	144,199
Liabilities related to assets held for sale and discontinued operations, net	328,167	415,737
Lease liability	184,425	179,895
Accounts payable, accrued liabilities, and other liabilities	697,040	763,391
Deferred revenue	765,946	774,316
Total liabilities	7,877,244	8,575,517
Commitments and contingencies
Common stock, $1.00 par value: 750,000,000 shares authorized; 538,885,793 and 538,405,393 shares issued and outstanding	538,886	538,405
Additional paid-in capital	10,223,711	10,229,857
Cumulative dividends in excess of earnings	(3,994,562)	(3,976,232)
Accumulated other comprehensive income (loss)	(3,497)	(3,685)
Total stockholders’ equity	6,764,538	6,788,345
Joint venture partners	352,986	357,069
Non-managing member unitholders	199,158	199,158
Total noncontrolling interests	552,144	556,227
Total equity	7,316,682	7,344,572
Total liabilities and equity	$ 15,193,926	$ 15,920,089