CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Real estate:
Buildings and improvements	$ 11,220,557	$ 10,877,248
Development costs and construction in progress	605,165	537,643
Land	1,717,259	1,637,506
Accumulated depreciation and amortization	(2,915,798)	(2,842,947)
Net real estate	10,627,183	10,209,450
Net investment in direct financing leases	363,395	713,818
Loans receivable, net	86,139	62,998
Investments in and advances to unconsolidated joint ventures	531,966	540,088
Accounts receivable, net of allowance of $5,175 and $5,127, respectively	48,555	48,171
Cash and cash equivalents	120,117	110,790
Restricted cash	26,535	29,056
Intangible assets, net	275,565	305,079
Assets held for sale, net	10,842	108,086
Right-of-use asset, net	165,748	0
Other assets, net	643,456	591,017
Total assets	12,899,501	12,718,553
LIABILITIES AND EQUITY
Bank line of credit	276,500	80,103
Senior unsecured notes	5,260,622	5,258,550
Mortgage debt	137,525	138,470
Other debt	89,223	90,785
Intangible liabilities, net	49,488	54,663
Liabilities of assets held for sale, net	132	1,125
Lease liability	152,837	0
Accounts payable and accrued liabilities	352,642	391,583
Deferred revenue	181,467	190,683
Total liabilities	6,500,436	6,205,962
Commitments and contingencies
Common stock, $1.00 par value: 750,000,000 shares authorized; 477,928,816 and 477,496,499 shares issued and outstanding, respectively	477,929	477,496
Additional paid-in capital	8,405,258	8,398,847
Cumulative dividends in excess of earnings	(3,042,422)	(2,927,196)
Accumulated other comprehensive income (loss)	(3,883)	(4,708)
Total stockholders' equity	5,836,882	5,944,439
Joint venture partners	389,369	391,401
Non-managing member unitholders	172,814	176,751
Total noncontrolling interests	562,183	568,152
Total equity	6,399,065	6,512,591
Total liabilities and equity	$ 12,899,501	$ 12,718,553