Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities:
Net income	$ 37,118	$ 65,349
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Gain on sale of real estate	(220)	(6,328)
Deferred income tax benefit	(1,113)	(609)
Equity in loss (income) from joint ventures	(420)	489
Proceeds from Equity Method Investment, Distribution	0	112
Financing Receivable, Credit Loss, Expense (Reversal)	1,192	0
depreciation and amort cont and discops	43,810	39,743
Amortization of deferred financing costs	1,634	1,502
Amortization of above/below market leases and tenant allowances, net	(152)	(59)
Share-based compensation expense to management and trustees	3,509	3,280
Increase (Decrease) in Operating Lease Assets and Liabilities, Net	273	445
Mortgage notes accrued interest receivable	(512)	(135)
Accounts receivable	14,149	14,669
Increase in direct financing lease receivable	0	(58)
Other assets	(4,454)	(5,673)
Accounts payable and accrued liabilities	(13,517)	4,684
Increase (Decrease) in Deferred Revenue	6,907	5,951
Net cash provided by operating activities	89,044	122,384
Investing activities:
Acquisition of and investments in real estate and other assets	24,709	93,322
Proceeds from Sale of Real Estate	2,907	37,810
Investment in unconsolidated joint ventures	0	325
Investment in mortgage notes receivable	(2,002)	(10,998)
Proceeds from Sale and Collection of Mortgage Notes Receivable	94	973
Investment in promissory notes receivable	0	61
Proceeds from promissory note receivable paydown	69	0
Additions to properties under development	(16,118)	(61,910)
Net cash used by investing activities	(39,759)	(127,833)
Financing activities:
Proceeds from long-term debt facilities	750,000	100,000
Principal payments on long-term debt	0	(66,150)
Deferred financing fees paid	(43)	(40)
Net proceeds from issuance of common shares	352	74,323
Payment, Tax Withholding, Share-based Payment Arrangement	0	(732)
Purchase of common shares for treasury	(6,769)	(9,499)
Dividends paid to shareholders	(94,303)	(88,748)
Net cash provided by financing activities	649,237	9,154
Effect of exchange rate changes on cash	(257)	70
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	698,265	3,775
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,229,705	22,282
Cash and Cash Equivalents, at Carrying Value	1,225,122	11,116
Restricted Cash and Cash Equivalents	4,583	11,166
Supplemental schedule of non-cash activity:
Transfer of property under development to rental property	20,089	7,330
Issuance of nonvested shares and restricted share units at fair value, including nonvested shares issued for payment of bonuses	17,595	14,682
Financing Receivable, Allowance for Credit Loss	3,355	0
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	0	214,576
Operating Lease, Cost	0	238,614
Straight-Line Rent Receivable	63,268
Other Real Estate, Additions	0	14,000
Noncash or Part Noncash Acquisition, Debt Assumed	0	18,585
Supplemental disclosure of cash flow information:
Interest Paid, Excluding Capitalized Interest, Operating Activities	28,137	28,676
Cash paid during the period for income taxes	251	695
Interest cost capitalized	262	3,137
Change in accrued capital expenditures	$ (882)	$ (6,406)