CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 292,474	$ 271,045
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amounts in discontinued operations)	458,348	496,660
Amortization of deferred revenue and lease intangibles, net	(10,090)	(13,630)
Other non-cash amortization	4,687	909
Stock-based compensation	10,037	11,192
Straight-lining of rental income, net	(15,426)	(16,761)
Loss (gain) on extinguishment of debt, net	2,782	(434)
Gain on real estate dispositions (including amounts in discontinued operations)	(31,923)	(14,432)
Gain on real estate loan investments	(33)	0
Gain on sale of marketable debt securities	0	(5,800)
Income tax benefit	(21,443)	(18,240)
(Income) loss from unconsolidated entities	(1,220)	242
Distributions from unconsolidated entities	3,873	14,973
Other	724	3,106
Changes in operating assets and liabilities:
Decrease (increase) in other assets	10,609	(9,711)
(Decrease) increase in accrued interest	(769)	16,108
Decrease in accounts payable and other liabilities	(46,155)	(17,503)
Net cash provided by operating activities	656,475	717,724
Cash flows from investing activities:
Net investment in real estate property	(34,453)	(1,253,910)
Investment in loans receivable and other	(152,450)	(55,659)
Proceeds from real estate disposals	63,561	273,191
Proceeds from loans receivable	7,644	93,275
Proceeds from sale or maturity of marketable securities	0	57,225
Funds held in escrow for future development expenditures	0	4,003
Development project expenditures	(69,679)	(62,630)
Capital expenditures	(46,925)	(43,429)
Other	(4,265)	(8,813)
Net cash used in investing activities	(236,567)	(996,747)
Cash flows from financing activities:
Net change in borrowings under credit facility	24,304	(321,334)
Proceeds from debt	416,217	1,107,971
Repayment of debt	(740,337)	(278,442)
Purchase of noncontrolling interest	(1,604)	(3,816)
Payment of deferred financing costs	(3,844)	(14,608)
Issuance of common stock, net	377,739	352,167
Cash distribution to common stockholders	(493,471)	(516,404)
Cash distribution to redeemable OP unitholders	(4,437)	(4,697)
Purchases of redeemable OP units	0	(33,188)
Contributions from noncontrolling interest	5,680	0
Distributions to noncontrolling interest	(3,582)	(9,467)
Other	7,883	5,928
Net cash (used in) provided by financing activities	(415,452)	284,110
Net increase in cash and cash equivalents	4,456	5,087
Effect of foreign currency translation on cash and cash equivalents	(157)	97
Cash and cash equivalents at beginning of period	53,023	55,348
Cash and cash equivalents at end of period	57,322	60,532
Assets and liabilities assumed from acquisitions:
Real estate investments	8,665	2,563,501
Utilization of funds held for an Internal Revenue Code Section 1031 exchange	(6,954)	(8,911)
Other assets acquired	861	16,505
Debt assumed	0	177,857
Other liabilities	2,638	49,788
Deferred income tax liability	(66)	51,620
Redeemable OP unitholder interests assumed	0	87,245
Equity issued	0	2,204,585
Equity issued for purchase of OP and Class C units	$ 20,770	$ 0