Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities:
Net income	$ 41,735	$ 43,838
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		700
Non-cash impairment charges	34,256
Loss (income) from discontinued operations	(18,926)	7,855
Costs associated with loan refinancing (non-cash portion)	1,759	3,067
Equity in income from joint ventures	(1,555)	(656)
Distributions from joint ventures	1,304	855
Depreciation and amortization	24,135	22,144
Amortization of deferred financing costs	1,787	2,224
Share-based compensation expense to management and trustees	2,841	2,334
Decrease in restricted cash	1,649	1,159
Increase in mortgage notes accrued interest receivable		(828)
Decrease (increase) in accounts receivable, net	1,396	(2,360)
Decrease (increase) in notes receivable accrued interest	48	(685)
Increase in direct financing lease receivable	(2,553)	(2,337)
Increase in other assets	(2,378)	(2,878)
Increase in accounts payable and accrued liabilities	2,927	897
Increase (decrease) in unearned rents and interest	138	(383)
Net operating cash provided by continuing operations	88,563	74,946
Net operating cash provided (used) by discontinued operations	3,767	(303)
Net cash provided by operating activities	92,330	74,643
Investing activities:
Acquisition of rental properties and other assets	(38,924)	(126,221)
Investment in unconsolidated joint ventures	(2,784)	(15,181)
Investment in mortgage notes receivable	(6,036)	(5,247)
Cash paid related to Cappelli settlement		(4,586)
Investment in direct financing lease, net	(2,113)	(44,232)
Additions to properties under development	(18,437)	(1,695)
Net cash used by investing activities of continuing operations	(68,294)	(197,162)
Net cash used by other investing activities of discontinued operations	(58)	(113,465)
Net proceeds from sale of real estate from discontinued operations	212,396	6,301
Net cash provided (used) by investing activities	144,044	(304,326)
Financing activities:
Proceeds from long-term debt facilities	195,000	711,225
Principal payments on long-term debt	(345,352)	(533,251)
Deferred financing fees paid	(934)	(10,726)
Net proceeds from issuance of common shares	145	141,055
Impact of stock option exercises, net	(499)	(336)
Purchase of common shares for treasury	(3,070)	(2,182)
Contribution paid from noncontrolling interests		12
Dividends paid to shareholders	(77,951)	(70,803)
Net cash provided (used) by financing activities of continuing operations	(232,661)	234,994
Net cash used by financing activities of discontinued operations		(6,240)
Net cash provided (used) by financing activities	(232,661)	228,754
Effect of exchange rate changes on cash	251	(2,065)
Net increase (decrease) in cash and cash equivalents	3,964	(2,994)
Cash and cash equivalents at beginning of the period	11,776	23,138
Cash and cash equivalents at end of the period	15,740	20,144
Supplemental schedule of non-cash activity:
Transfer of property under development to rental property	4,552	2,089
Acquisition of real estate in exchange for assumption of debt at fair value	4,109
Issuance of nonvested shares and restricted share units at fair value, including nonvested shares issued for payment of bonuses	6,785	4,718
Receipt of 86,056 common shares in payment of shareholder loans		3,261
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	36,025	35,228
Cash paid during the period for income taxes	$ 632	$ 520