Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Income (Loss) Available to Common Stockholders, Diluted	$ 48,228	$ 36,869
Operating activities:
Net income	54,180	42,821
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss from discontinued operations	0	10
Gain on sale of real estate	0	(23,924)
Deferred income tax expense (benefit)	(602)	6,888
Costs associated with loan refinancing or payoff	552	0
Equity in income from joint ventures	212	164
Distributions from joint ventures	511	0
Depreciation and amortization	25,955	19,355
Amortization of deferred financing costs	1,172	1,096
Amortization of above and below Market Leases	48	48
Share-based compensation expense to management and trustees	2,765	1,972
Share-based compensation expense included in retirement severance expense	0	6,377
Decrease (increase) in restricted cash	(2,221)	730
Decrease (increase) in mortgage notes accrued interest receivable	514	(599)
Increase in accounts receivable, net	(2,968)	(2,330)
Increase in direct financing lease receivable	(840)	(934)
Increase in other assets	(2,907)	(2,891)
Increase (decrease) in accounts payable and accrued liabilities	(6,878)	2,529
Increase in unearned rents and interest	8	6,079
Net operating cash provided by continuing operations	69,077	57,063
Net operating cash provided by discontinued operations	0	455
Net cash provided by operating activities	69,077	57,518
Investing activities:
Acquisition of rental properties and other assets	36,907	49,207
Proceeds from sale of real estate	1,920	43,790
Investment in mortgage notes receivable	(53,659)	(18,698)
Proceeds from mortgage note receivable paydown	19,496	148
Additions to properties under development	(61,765)	(69,195)
Net cash used by investing activities	(130,915)	(93,162)
Financing activities:
Proceeds from long-term debt facilities	162,000	453,914
Principal payments on long-term debt	(148,586)	(251,100)
Deferred financing fees paid	(36)	(2,878)
Proceeds from (Payments for) Other Financing Activities	(472)	0
Net proceeds from issuance of common shares	125,199	123
Impact of stock option exercises, net	(635)	(33)
Purchase of common shares for treasury	(4,208)	(8,222)
Dividends paid to shareholders	(64,823)	(56,796)
Net cash provided by financing activities	68,439	135,008
Effect of exchange rate changes on cash	96	(494)
Net increase in cash and cash equivalents	6,697	98,870
Cash and cash equivalents at beginning of the year	4,283	3,336
Cash and cash equivalents at end of the year	10,980	102,206
Supplemental schedule of non-cash activity:
Transfer of property under development to rental property	173,877	30,466
Issuance of nonvested shares and restricted share units at fair value, including nonvested shares issued for payment of bonuses	18,505	11,610
Supplemental disclosure of cash flow information:
Cash paid during the year for interest	34,257	34,871
Cash paid during the period for income taxes	418	397
Interest cost capitalized	2,291	4,348
Decrease in accrued capital expenditures	$ (7,320)	$ (5,009)