Income per Common Share of the Trust (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table 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):

	2014					2013
	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	$	170,471	147,216	$	1.16	$	91,274	130,180	$	0.70
Dilutive shares for long-term compensation plans	—		670			—		729
Diluted income from continuing operations
Income from continuing operations net of noncontrolling interest	170,471		147,886	$	1.15	91,274		130,909	$	0.70
Basic income from discontinued operations
Discontinued operations net of noncontrolling interest	47,439		147,216	$	0.32	118,464		130,180	$	0.91
Dilutive shares for long-term compensation plans	—		670			—		729
Diluted income from discontinued operations
Discontinued operations net of noncontrolling interest	47,439		147,886	$	0.32	118,464		130,909	$	0.90
Basic income per common share
Net income available to common shareholders	217,910		147,216	$	1.48	209,738		130,180	$	1.61
Dilutive shares for long-term compensation plans	—		670			—		729
Diluted income per common share
Net income available to common shareholders	$	217,910	147,886	$	1.47	$	209,738	130,909	$	1.60

	2012
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Basic income from continuing operations
Income from continuing operations net of noncontrolling interest	$	88,008	116,863	$	0.75
Dilutive shares for long-term compensation plans	—		831
Diluted income from continuing operations
Income from continuing operations net of noncontrolling interest	88,008		117,694	$	0.75
Basic income from discontinued operations
Discontinued operations net of noncontrolling interest	49,428		116,863	$	0.43
Dilutive shares for long-term compensation plans	—		831
Diluted income from discontinued operations
Discontinued operations net of noncontrolling interest	49,428		117,694	$	0.42
Basic income per common share
Net income available to common shareholders	137,436		116,863	$	1.18
Dilutive shares for long-term compensation plans	—		831
Diluted income per common share
Net income available to common shareholders	$	137,436	117,694	$	1.17