Income per Common Share of the Trust (Tables)

3 Months Ended

Mar. 31, 2013

Income per Common Share of the Trust [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	For the Three Months Ended					For the Three Months Ended
	March 31, 2013					March 31, 2012
	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	$	29,925	118,688	$	0.25	$	31,872	115,972	$	0.28
Dilutive shares for long-term compensation plans	—		844			—		771
Diluted income from continuing operations
Income from continuing operations net of noncontrolling interest	$	29,925	119,532	$	0.25	$	31,872	116,743	$	0.28
Basic income from discontinued operations
Discontinued operations net of noncontrolling interest	$	41,314	118,688	$	0.35	$	5,217	115,972	$	0.04
Dilutive shares for long-term compensation plans	—		844			—		771
Diluted income from discontinued operations
Discontinued operations net of noncontrolling interest	$	41,314	119,532	$	0.35	$	5,217	116,743	$	0.04
Basic income per common share
Net income available to common shareholders	$	71,239	118,688	$	0.60	$	37,089	115,972	$	0.32
Dilutive shares for long-term compensation plans	—		844			—		771
Diluted income per common share
Net income available to common shareholders	$	71,239	119,532	$	0.60	$	37,089	116,743	$	0.32