CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 39,263	$ 35,999
Adjustments to net income:
Depreciation and amortization	35,250	26,608
Income from discontinued operations	(851)	(388)
Amortization of share-based compensation	2,956	2,180
Amortization of net premiums on mortgages payable	(97)	0
Cash provided by discontinued operations:
Real estate	292	704
Collection of notes receivable by Crest	22	36
Changes in assets and liabilities:
Accounts receivable and other assets	(166)	7,509
Accounts payable, accrued expenses and other liabilities	(26,343)	(31,122)
Net cash provided by operating activities	50,326	41,526
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of and improvements to investment properties	(8,913)	(150,643)
Proceeds from sales of real estate, discontinued operations	3,559	1,099
Loan receivable	(1,695)	0
Restricted escrow deposits	(2,239)	(6,148)
Net cash used in investing activities	(9,288)	(155,692)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash distributions to common stockholders	(58,192)	(51,123)
Cash dividends to preferred stockholders	(8,216)	(6,063)
Borrowings from line of credit	122,000	38,600
Payments under line of credit	(316,400)	(38,600)
Principal payments on mortgages	(10,806)	0
Proceeds from preferred stock offering, net	360,941	0
Redemption of preferred stock	(127,500)	0
Proceeds from common stock offerings, net	0	285,533
Proceeds from dividend reinvestment and stock purchase plan, net	743	0
Other items	(2,579)	(2,081)
Net cash provided by (used in) financing activities	(40,009)	226,266
Net increase in cash and cash equivalents	1,029	112,100
Cash and cash equivalents, beginning of period	4,165	17,607
Cash and cash equivalents, end of period	$ 5,194	$ 129,707