Income per Common Share of the Trust

12 Months Ended

Dec. 31, 2011

Income per Common Share of the Trust [Abstract]

Earnings Per Share [Text Block]

The following table sets forth the computation of basic and diluted income per common share of the Trust (in thousands except per share amounts):

	2011					2010
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Basic income from continuing operations
Income from continuing operations net of noncontrolling interest	$	115,469	114,755	$	1.00	$	105,172	112,924	$	0.93
Dilutive shares for long-term compensation plans	—		748			—		682
Diluted income from continuing operations
Income from continuing operations net of noncontrolling interest	115,469		115,503	$	1.00	105,172		113,606	$	0.92
Basic income from discontinued operations
Discontinued operations net of noncontrolling interest	68,530		114,755	$	0.60	22,590		112,924	$	0.20
Dilutive shares for long-term compensation plans	—		748			—		682
Diluted income from discontinued operations
Discontinued operations net of noncontrolling interest	68,530		115,503	$	0.59	22,590		113,606	$	0.20
Basic income per common share
Net income available to common shareholders	183,999		114,755	$	1.60	127,762		112,924	$	1.13
Dilutive shares for long-term compensation plans	—		748			—		682
Diluted income per common share
Net income available to common shareholders	$	183,999	115,503	$	1.59	$	127,762	113,606	$	1.12

	2009
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Basic income from continuing operations
Income from continuing operations net of noncontrolling interest	$	9,623	107,550	$	0.09
Dilutive shares for long-term compensation plans	—		452
Diluted income from continuing operations
Income from continuing operations net of noncontrolling interest	9,623		108,002	$	0.09
Basic income from discontinued operations
Discontinued operations net of noncontrolling interest	46,753		107,550	$	0.43
Dilutive shares for long-term compensation plans	—		452
Diluted income from discontinued operations
Discontinued operations net of noncontrolling interest	46,753		108,002	$	0.43
Basic income per common share
Net income available to common shareholders	56,376		107,550	$	0.52
Dilutive shares for long-term compensation plans	—		452
Diluted income per common share
Net income available to common shareholders	$	56,376	108,002	$	0.52

Dilutive shares for long-term compensation plans represent the unvested common shares outstanding during the year as well as the dilutive effect of outstanding options. The amounts of anti-dilutive options that were excluded from the computation of diluted income per common share as the exercise price was higher than the average share price of the Company in 2011, 2010 and 2009 were 1,685,000, 1,433,000 and 2,661,000, respectively.

During the years ended December 31, 2011, 2010 and 2009, 256,000, 315,000 and 187,000 common shares, respectively, were issued upon the exercise of options.

During the years ended December 31, 2011, 2010 and 2009, individuals acquired 119,987, 82,621 and 63,613 common shares, respectively, in exchange for the same number of common units. These individuals acquired these common units in connection with their contributions to the Operating Partnership of certain assets in prior years. The exchange of common shares for the common units is exempt from the registration requirement of the Securities Act of 1933, as amended, pursuant to Section 4(2) thereunder.