Real Property Acquisitions and Development (Tables)

6 Months Ended

Jun. 30, 2011

Real property acquisitions and development [Line Items]

Pro forma consolidated results of operations

	Six Months Ended June 30,
	2011		2010
Revenues	$	689,630	$	408,005
Income from continuing operations attributable to common stockholders	$	50,550	$	73,928
Income from continuing operations attributable to common stockholders per share:
Basic	$	0.29	$	0.49
Diluted	$	0.29	$	0.48

Summary of real property investment activity

	Six Months Ended
	June 30, 2011					June 30, 2010
	Properties		Amount			Properties		Amount
Real property acquisitions:
Senior housing operating		46	$	1,126,130			—	$	—
Senior housing triple-net		165		2,849,603			10		109,492
Medical facilities		6		65,599			19		246,582
Land parcels		1		6,770			—		—
Total acquisitions		218		4,048,102			29		356,074
Less: Assumed debt				(721,632	)				(117,892	)
Assumed other items, net(1)				(147,500	)				(31,690	)
Cash disbursed for acquisitions				3,178,970					206,492
Construction in progress additions:
Senior housing triple-net				75,999					50,726
Medical facilities				124,150					129,568
Total construction in progress additions				200,149					180,294
Less: Capitalized interest				(6,979	)				(11,983	)
Accruals(2)				(30,736	)				(5,775	)
Cash disbursed for construction in progress				162,434					162,536
Capital improvements to existing properties				29,193					20,845
Total cash invested in real property			$	3,370,597				$	389,873

(1)	Includes $75,144,000 of capital lease obligations.
(2)	Represents non-cash accruals for amounts to be paid in future periods relating to properties that converted in the period noted above.

Summary of construction projects placed into service and generating revenues

	Six Months Ended
	June 30, 2011		June 30, 2010
Development projects:
Senior housing triple-net	$	—	$	269,260
Medical facilities		325,563		110,481
Total development projects		325,563		379,741
Expansion projects		19,218		1,502
Total construction in progress conversions	$	344,781	$	381,243

Silverado Partnership [Member]

Real property acquisitions and development [Line Items]

Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities

Land and land improvements	$	11,170
Buildings and improvements		173,841
Acquired lease intangibles		19,305
Investment in unconsolidated subsidiary		14,960
Cash and cash equivalents		4,084
Total assets acquired		223,360
Secured debt		60,667
Total liabilities assumed		60,667
Capital in excess of par		6,017
Noncontrolling interests		7,836
Net assets acquired	$	148,840

Benchmark partnership [Member]

Real property acquisitions and development [Line Items]

Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities

Land and land improvements	$	60,440
Buildings and improvements		792,394
Acquired lease intangibles		68,980
Cash and cash equivalents		28,258
Restricted cash		5,451
Total assets acquired		955,523
Secured debt		524,989
Accrued expenses and other liabilities		17,412
Entrance fee liability		13,269
Total liabilities assumed		555,670
Noncontrolling interests		19,575
Net assets acquired	$	380,278