CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue:
Rental and other income	$ 386,321	$ 249,675	$ 694,415	$ 491,501
Management, development and other fees	2,913	2,770	5,185	5,319
Total revenue	389,234	252,445	699,600	496,820
Expenses:
Operating expenses, excluding property taxes	90,056	66,751	163,748	130,788
Property taxes	42,038	24,528	74,753	48,171
Interest expense, net	43,169	33,191	81,342	66,814
Loss on extinguishment of debt, net				1,179
Depreciation expense	196,106	63,224	305,280	124,137
General and administrative expense	11,345	8,316	21,384	18,026
Expensed acquisition, development, and other pursuit costs	3,768	901	43,827	1,141
Total expenses	386,482	196,911	690,334	390,256
Equity in income (loss) of unconsolidated entities	(940)	2,073	(19,503)	4,248
Gain on sale of land	240	280	240	280
Income (loss) from continuing operations	2,052	57,887	(9,997)	111,092
Discontinued operations:
Income from discontinued operations	363	3,885	3,394	8,289
Gain on sale of real estate assets	33,682	95,049	118,173	95,049
Total discontinued operations	34,045	98,934	121,567	103,338
Net income	36,097	156,821	111,570	214,430
Net loss attributable to noncontrolling interests	121	88	78	237
Net income attributable to common stockholders	36,218	156,909	111,648	214,667
Other comprehensive income:
Unrealized gain (loss) on cash flow hedges		(27,798)		(16,789)
Cash flow hedge losses reclassified to earnings	1,574		2,965
Comprehensive income	$ 37,792	$ 129,111	$ 114,613	$ 197,878
Earnings per common share - basic:
Income (loss) from continuing operations attributable to common stockholders (in dollars per share)	$ 0.02	$ 0.61	$ (0.08)	$ 1.17
Discontinued operations attributable to common stockholders (in dollars per share)	$ 0.26	$ 1.03	$ 0.98	$ 1.08
Net income attributable to common stockholders (in dollars per share)	$ 0.28	$ 1.64	$ 0.90	$ 2.25
Earnings per common share - diluted:
Income (loss) from continuing operations attributable to common stockholders (in dollars per share)	$ 0.02	$ 0.60	$ (0.08)	$ 1.16
Discontinued operations attributable to common stockholders (in dollars per share)	$ 0.26	$ 1.03	$ 0.97	$ 1.08
Net income attributable to common stockholders (in dollars per share)	$ 0.28	$ 1.63	$ 0.89	$ 2.24
Dividends per common share: (in dollars per share)	$ 1.07	$ 0.97	$ 2.14	$ 1.94