CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Real estate:
Buildings and improvements	$ 12,501,511	$ 10,972,973
Development costs and construction in progress	390,584	275,233
Land	1,995,657	1,889,438
Accumulated depreciation and amortization	(2,605,036)	(2,250,757)
Net real estate	12,282,716	10,886,887
Carrying value of direct financing leases	5,905,009	7,280,334
Loans receivable, net	768,743	906,961
Investments in and advances to unconsolidated joint ventures	605,244	605,448
Accounts receivable, net of allowance of $3,683 and $3,785, respectively	48,929	36,339
Cash and cash equivalents	346,500	183,810
Restricted cash	60,616	48,976
Intangible assets, net	614,227	481,013
Other assets, net	817,865	901,668
Total assets	21,449,849	21,331,436
LIABILITIES AND EQUITY
Bank line of credit	397,432	838,516
Term loan	524,807	212,986
Senior unsecured notes	9,120,107	7,589,960
Mortgage debt	932,212	982,785
Other debt	94,445	97,022
Intangible liabilities, net	75,273	84,723
Accounts payable and accrued liabilities	436,239	432,934
Deferred revenue	123,017	95,411
Total liabilities	$ 11,703,532	$ 10,334,337
Commitments and contingencies
Common stock, $1.00 par value: 750,000,000 shares authorized; 465,488,492 and 459,746,267 shares issued and outstanding, respectively	$ 465,488	$ 459,746
Additional paid-in capital	11,647,039	11,431,987
Cumulative dividends in excess of earnings	(2,738,414)	(1,132,541)
Accumulated other comprehensive loss	(30,470)	(23,895)
Total stockholders' equity	9,343,643	10,735,297
Joint venture partners	217,066	73,214
Non-managing member unitholders	185,608	188,588
Total noncontrolling interests	402,674	261,802
Total equity	9,746,317	10,997,099
Total liabilities and equity	$ 21,449,849	$ 21,331,436