CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 206,650	$ 180,012
Adjustments to net income:
Depreciation and amortization	287,943	265,102
Amortization of share-based compensation	7,291	8,657
Non-cash revenue adjustments	(4,351)	(4,029)
Amortization of net premiums on mortgages payable	(708)	(813)
Amortization of deferred financing costs	3,960	3,469
Loss (gain) on interest rate swaps	1,364	(2,799)
Foreign currency and derivative gains, net	(136)	0
Gain on sales of real estate	(14,154)	(11,005)
Provisions for impairment on real estate	17,733	18,172
Change in assets and liabilities
Accounts receivable and other assets	(11,250)	2,785
Accounts payable, accrued expenses and other liabilities	(4,679)	17,718
Net cash provided by operating activities	489,663	477,269
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in real estate	(1,604,575)	(829,818)
Improvements to real estate, including leasing costs	(11,767)	(17,017)
Proceeds from sales of real estate	51,052	47,526
Insurance proceeds received	0	3,836
Collection of loans receivable	0	5,267
Non-refundable escrow deposits	(9,619)	0
Net cash used in investing activities	(1,574,909)	(790,206)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash distributions to common stockholders	(413,410)	(373,044)
Borrowings on line of credit	1,404,000	1,140,000
Payments on line of credit	(1,648,000)	(716,000)
Principal payment on term loan	(70,000)	(125,866)
Proceeds from notes and bonds payable issued	895,774	497,500
Principal payment on notes payable	0	(350,000)
Principal payments on mortgages payable	(2,492)	(13,447)
Proceeds from common stock offerings, net	845,061	0
Proceeds from dividend reinvestment and stock purchase plan	4,098	4,806
Proceeds from At-the-Market (ATM) program, net	122,155	297,983
Redemption of common units	(20,225)	0
Distributions to noncontrolling interests	(635)	(758)
Debt issuance costs	(7,331)	(4,436)
Other items, including shares withheld upon vesting	(4,195)	(11,143)
Net cash provided by financing activities	1,104,800	345,595
Effect of exchange rate changes on cash and cash equivalents	(733)	0
Net increase in cash, cash equivalents and restricted cash	18,821	32,658
Cash, cash equivalents and restricted cash, beginning of period	21,071	12,142
Cash, cash equivalents and restricted cash, end of period	$ 39,892	$ 44,800