Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Consolidated net income	$ 109,825	$ 51,231	$ 30,875
Adjustments to reconcile net income to net cash provided by operating activities:
Retail revenue accretion	(31)	0	0
Depreciation and amortization	132,195	119,329	106,692
Stock compensation expense	2,233	5,519	3,013
Redeemable stock issued	546	494	387
Amortization of debt premium	(767)	(360)	(360)
Loss from investments in real estate joint ventures	223	593	1,149
Loss on debt extinguishment	1,012	755	0
Derivative interest expense	827	543	321
Gain on sale of non-depreciable assets	(45)	(910)	0
(Gain) loss on sale of discontinued operations	(41,635)	(12,799)	2
Asset impairment	0	0	1,914
Net casualty (gain) loss and other settlement proceeds	(42)	619	(330)
Gain on properties contributed to joint ventures	0	0	(752)	[1]
Changes in assets and liabilities:
Restricted cash	554	152	(953)
Other assets	(1,395)	(1,356)	(5,529)
Accounts payable	2,495	265	109
Accrued expenses and other	4,613	8,596	(649)
Security deposits	359	(383)	(2,095)
Net cash provided by operating activities	210,967	172,288	133,794
Cash flows from investing activities:
Purchases of real estate and other assets	(312,001)	(362,745)	(278,810)
Normal capital improvements	(47,222)	(46,947)	(26,505)
Construction capital and other improvements	(3,636)	(5,190)	(2,577)
Renovations to existing real estate assets	(14,420)	(12,680)	(9,925)
Development	(73,991)	(38,153)	(16,394)
Distributions from real estate joint ventures	12,164	1,402	1,735
Contributions to real estate joint ventures	(218)	(1,510)	(12,130)
Proceeds from disposition of real estate assets	110,101	23,663	90,335
Net cash used in investing activities	(329,223)	(442,160)	(254,271)
Cash flows from financing activities:
Net change in credit lines	(320,064)	(121,533)	(35,000)
Proceeds from notes payable	325,000	285,350	137,881
Principal payments on notes payable	(12,944)	(13,895)	(1,924)
Payment of deferred financing costs	(3,616)	(4,641)	(7,245)
Repurchase of common stock	(1,990)	(2,548)	(1,175)
Proceeds from issuances of common shares	196,325	235,741	305,526
Distributions to noncontrolling interests	(4,948)	(5,199)	(5,684)
Dividends paid on common shares	(107,749)	(92,028)	(77,135)
Dividends paid on preferred shares	0	0	(7,622)
Redemption of preferred stock	0	0	(155,022)
Net cash provided by financing activities	70,014	281,247	152,600
Net (decrease) increase in cash and cash equivalents	(48,242)	11,375	32,123
Cash and cash equivalents, beginning of period	57,317	45,942	13,819
Cash and cash equivalents, end of period	9,075	57,317	45,942
Supplemental disclosure of cash flow information:
Interest paid	60,950	59,655	56,596
Supplemental disclosure of noncash investing and financing activities:
Conversion of units to shares of common stock	3,459	3,069	1,266
Accrued construction in progress	3,449	8,599	3,139
Interest capitalized	2,318	1,156	66
Marked-to-market adjustment on derivative instruments	10,875	13,084	(1,839)
Reclassification of redeemable stock to liabilities	0	152	272
Fair value adjustment on debt assumed	2,578	0	0
Debt assumed	$ 30,290	$ 0	$ 0

[1] The 2010 column shows the segment break down based on the 2011 same store portfolios. A comparison using the 2012 same store portfolio would not be comparative due to the nature of the classifications.