CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
REVENUE
Rental	$ 115,038	$ 101,361	$ 229,060	$ 197,934
Other	605	259	858	398
Total revenue	115,643	101,620	229,918	198,332
EXPENSES
Depreciation and amortization	35,475	28,673	70,560	55,104
Interest	28,806	25,647	57,758	50,769
General and administrative	9,273	7,987	18,441	15,857
Property	2,090	1,597	4,536	3,281
Income taxes	405	368	810	735
Total expenses	76,049	64,272	152,105	125,746
Income from continuing operations	39,594	37,348	77,813	72,586
Income from discontinued operations	3,813	1,900	4,858	2,661
Net income	43,407	39,248	82,671	75,247
Preferred stock dividends	(10,457)	(6,063)	(19,953)	(12,127)
Excess of redemption value over carrying value of preferred shares redeemed (see note 8)			(3,696)
Net income available to common stockholders	$ 32,950	$ 33,185	$ 59,022	$ 63,120
Income from continuing operations:
Basic (in dollars per share)	$ 0.22	$ 0.25	$ 0.41	$ 0.49
Diluted (in dollars per share)	$ 0.22	$ 0.25	$ 0.41	$ 0.49
Net income:
Basic (in dollars per share)	$ 0.25	$ 0.26	$ 0.44	$ 0.52
Diluted (in dollars per share)	$ 0.25	$ 0.26	$ 0.44	$ 0.51
Weighted average common shares outstanding:
Basic (in shares)	132,592,939	125,999,323	132,643,698	122,547,027
Diluted (in shares)	132,828,540	126,202,047	132,785,213	122,691,418