CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Real estate:
Buildings and improvements	$ 11,543,657	$ 11,048,433
Development costs and construction in progress	711,772	613,182
Land	1,966,665	1,867,278
Accumulated depreciation and amortization	(2,618,101)	(2,409,135)
Net real estate	11,603,993	11,119,758
Net investment in direct financing leases	44,706	44,706
Loans receivable, net of reserves of $4,198 and $10,280	429,076	195,375
Investments in and advances to unconsolidated joint ventures	388,415	402,871
Accounts receivable, net of allowance of $3,429 and $3,994	41,814	42,269
Cash and cash equivalents	96,923	44,226
Restricted cash	129,052	67,206
Intangible assets, net	511,612	519,917
Assets held for sale and discontinued operations, net	246,807	2,626,306
Right-of-use asset, net	215,303	192,349
Other assets, net	624,669	665,106
Total assets	14,332,370	15,920,089
LIABILITIES AND EQUITY
Bank line of credit and commercial paper	720,000	129,590
Term loan	249,303	249,182
Senior unsecured notes	3,710,972	5,697,586
Mortgage debt	358,101	221,621
Intangible liabilities, net	139,116	144,199
Liabilities related to assets held for sale and discontinued operations, net	65,272	415,737
Lease liability	189,732	179,895
Accounts payable, accrued liabilities, and other liabilities	688,458	763,391
Deferred revenue	777,687	774,316
Total liabilities	6,898,641	8,575,517
Commitments and contingencies
Common stock, $1.00 par value: 750,000,000 shares authorized; 538,955,168 and 538,405,393 shares issued and outstanding	538,955	538,405
Additional paid-in capital	10,229,549	10,229,857
Cumulative dividends in excess of earnings	(3,880,253)	(3,976,232)
Accumulated other comprehensive income (loss)	(3,389)	(3,685)
Total stockholders’ equity	6,884,862	6,788,345
Joint venture partners	347,610	357,069
Non-managing member unitholders	201,257	199,158
Total noncontrolling interests	548,867	556,227
Total equity	7,433,729	7,344,572
Total liabilities and equity	$ 14,332,370	$ 15,920,089