Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Consolidated net income	$ 16,835	$ 16,737
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of deferred financing costs	57,318	51,266
Stock compensation expense	1,686	1,131
Redeemable stock issued	293	213
Amortization of debt premium	(180)	(180)
Loss from investments in real estate joint ventures	423	574
Loss on debt extinguishment	48
Derivative interest expense	222	300
Loss on sale of non-depreciable assets	6
Loss (gain) on sale of discontinued operations		2
Asset impairment		1,590
Net casualty loss (gains) and other settlement proceeds	406	(258)
Gain on properties contributed to joint ventures		(371)
Changes in assets and liabilities:
Restricted cash	(113)	(169)
Other assets	1,943	1,447
Accounts payable	1,012	(234)
Accrued expenses and other	3,714	(4,436)
Security deposits	(62)	(696)
Net cash provided by operating activities	83,551	66,916
Cash flows from investing activities:
Purchases of real estate and other assets	(185,901)	(69,718)
Improvements to existing real estate assets	(25,781)	(21,901)
Renovations to existing real estate assets	(6,005)	(3,552)
Development	(8,658)
Distributions from real estate joint ventures	828	1,481
Contributions to real estate joint ventures	(1,373)	(6,006)
Proceeds from disposition of real estate assets	320	48,074
Net cash used in investing activities	(226,570)	(51,622)
Cash flows from financing activities:
Net change in credit lines	(12,817)	(55,000)
Proceeds from notes payable	150,350	19,500
Principal payments on notes payable	(101,612)	(721)
Payment of deferred financing costs	(1,700)	(5,731)
Repurchase of common stock	(2,260)	(813)
Proceeds from issuances of common shares	125,737	161,999
Distributions to noncontrolling interests	(2,719)	(2,927)
Dividends paid on common shares	(45,064)	(36,198)
Dividends paid on preferred shares		(6,467)
Redemption of preferred stock		(77,510)
Net cash provided by (used in) financing activities	109,915	(3,868)
Net (decrease) increase in cash and cash equivalents	(33,104)	11,426
Cash and cash equivalents, beginning of period	45,942	13,819
Cash and cash equivalents, end of period	12,838	25,245
Supplemental disclosure of cash flow information:
Interest paid	28,034	28,458
Supplemental disclosure of noncash investing and financing activities:
Conversion of units to shares of common stock	2,878	1,190
Accrued construction in progress	6,775	2,139
Interest capitalized	459
Marked-to-market adjustment on derivative instruments	6,587	(10,063)
Reclassification of redeemable stock to liabilities	$ 151	$ 269