CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Real estate:
Buildings and improvements	$ 12,720,111	$ 11,120,039
Development costs and construction in progress	588,343	692,336
Land	2,114,024	1,992,602
Accumulated depreciation and amortization	(2,840,632)	(2,771,922)
Net real estate	12,581,846	11,033,055
Net investment in direct financing leases	44,706	84,604
Loans receivable, net of reserves of $9,314 and $0	220,652	190,579
Investments in and advances to unconsolidated joint ventures	479,900	825,515
Accounts receivable, net of allowance of $8,594 and $4,565	85,037	59,417
Cash and cash equivalents	783,542	144,232
Restricted cash	106,557	40,425
Intangible assets, net	550,348	331,693
Assets held for sale, net	271,861	504,394
Right-of-use asset, net	171,843	172,486
Other assets, net	776,387	646,491
Total assets	16,072,679	14,032,891
LIABILITIES AND EQUITY
Bank line of credit and commercial paper	0	93,000
Term loan	249,002	248,942
Senior unsecured notes	5,650,053	5,647,993
Mortgage debt	490,049	276,907
Intangible liabilities, net	72,137	74,991
Liabilities of assets held for sale, net	31,724	36,369
Lease liability	156,808	156,611
Accounts payable, accrued liabilities, and other liabilities	856,031	540,924
Deferred revenue	753,432	289,680
Total liabilities	8,259,236	7,365,417
Commitments and contingencies
Common stock, $1.00 par value: 750,000,000 shares authorized; 538,135,188 and 505,221,643 shares issued and outstanding	538,135	505,222
Additional paid-in capital	10,213,011	9,183,892
Cumulative dividends in excess of earnings	(3,512,143)	(3,601,199)
Accumulated other comprehensive income (loss)	(2,495)	(2,857)
Total stockholders' equity	7,236,508	6,085,058
Joint venture partners	373,495	378,061
Non-managing member unitholders	203,440	204,355
Total noncontrolling interests	576,935	582,416
Total equity	7,813,443	6,667,474
Total liabilities and equity	$ 16,072,679	$ 14,032,891