Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Stockholders' Equity [Abstract]

Issuance Of Common Stock Through "At-The-Market" Equity Offering Program

Period	Number of Shares Sold		Gross Proceeds		Net Proceeds		Average Sales Price
Fourth quarter 2009		871,600	$	39,830	$	38,916	$	45.70
First quarter 2010		1,285,700		60,092		58,856		46.74
Second quarter 2010		1,021,400		50,078		49,273		49.03
Total		3,178,700	$	150,000	$	147,045	$	47.19

Period	Number of Shares Sold		Gross Proceeds		Net Proceeds		Average Sales Price
First quarter 2011		841,000	$	47,524	$	46,572	$	56.51
Second quarter 2011		1,485,707		90,102		88,299		60.65
Third quarter 2011		877,400		56,542		55,273		64.44
Total		3,204,107	$	194,168	$	190,144	$	60.60

Taxable Composition Of Cash Distributions

							Distribution Type
Declaration Dates	Record Dates		Payable Dates		Distributions Per Share		Ordinary Taxable Dividend			Qualified Dividend			Return of Capital			Long- Term Capital Gain			Unrecaptured Sec. 1250 Gain
2/12/2011		2/28/2011		3/4/2011	$	0.62		62.8481	%		0.0000	%		37.1519	%		0.0000	%		0.0000	%
5/3/2011		5/17/2011		5/27/2011	$	0.62		62.8481	%		0.0000	%		37.1519	%		0.0000	%		0.0000	%
8/3/2011		8/16/2011		8/26/2011	$	0.62		62.8481	%		0.0000	%		37.1519	%		0.0000	%		0.0000	%
11/2/2011		11/14/2011		11/22/2011	$	0.62		62.8481	%		0.0000	%		37.1519	%		0.0000	%		0.0000	%
				Totals	$	2.48		62.8481	%		0.0000	%		37.1519	%		0.0000	%		0.0000	%

		Distribution Type
Year	Distributions Per Share		Ordinary Taxable Dividend			Qualified Dividend			Return of Capital			Long- Term Capital Gain			Unrecaptured Sec. 1250 Gain
2010	$2.32			53.73	%		0.00	%		46.27	%		0.00	%		0.00	%
2009	$2.68			39.44	%		0.00	%		44.02	%		2.75	%		13.79	%

Reconciliation Of Basic And Diluted Earnings Per Share

	2011			2010			2009
Numerator:
Income from continuing operations	$	47,664		$	26,738		$	27,069
Less: Income from continuing operations attributable to noncontrolling interest		(9,808	)		(6,344	)		(7,312	)
Income from continuing operations attributable to common stockholders	$	37,856		$	20,394		$	19,757
Discontinued operations	$	—		$	(420	)	$	20,009
Less: Discontinued operations attributable to noncontrolling interest		—			107			(5,347	)
Discontinued operations attributable to common stockholders	$	—		$	(313	)	$	14,662
Denominator:
Basic weighted average number of common shares outstanding		41,860,139			36,682,191			33,040,839
Effect of dilutive stock options		595,708			419,380			100,519
Effect of restricted shares		89,235			68,315			30,758
Diluted weighted average number of common shares outstanding		42,545,082			37,169,886			33,172,116
Earnings per common share:
Basic earnings per share:
Income from continuing operations	$	0.90		$	0.56		$	0.60
Discontinued operations		—			(0.01	)		0.44
Net income attributable to common stockholders	$	0.90		$	0.55		$	1.04
Diluted earnings per share:
Income from continuing operations	$	0.89		$	0.55		$	0.60
Discontinued operations		—			(0.01	)		0.44
Net income attributable to common stockholders	$	0.89		$	0.54		$	1.04