Income per Common Unit of the Operating Partnership (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Unit, Basic and Diluted [Line Items]

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

Liberty Property Limited Partnership [Member]

Earnings Per Unit, Basic and Diluted [Line Items]

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 unit of the Operating Partnership (in thousands, except per unit amounts):

	2014						2013
	Income (Numerator)			Weighted Average Units (Denominator)	Per Unit		Income (Numerator)			Weighted Average Units (Denominator)	Per Unit
Income from continuing operations net of noncontrolling interest - consolidated joint ventures	$	175,035					$	97,102
Less: Preferred unit distributions	(472		)				(2,119		)
Excess of preferred unit redemption over carrying amount	—						(1,236		)
Basic income from continuing operations
Income from continuing operations available to common unitholders	174,563			150,770	$	1.16	93,747			133,858	$	0.70
Dilutive units for long-term compensation plans	—			670			—			729
Diluted income from continuing operations
Income from continuing operations available to common unitholders	174,563			151,440	$	1.15	93,747			134,587	$	0.70
Basic income from discontinued operations
Discontinued operations	48,581			150,770	$	0.32	121,839			133,858	$	0.91
Dilutive units for long-term compensation plans	—			670			—			729
Diluted income from discontinued operations
Discontinued operations	48,581			151,440	$	0.32	121,839			134,587	$	0.90
Basic income per common unit
Income available to common unitholders	223,144			150,770	$	1.48	215,586			133,858	$	1.61
Dilutive units for long-term compensation plans	—			670			—			729
Diluted income per common unit
Income available to common unitholders	$	223,144		151,440	$	1.47	$	215,586		134,587	$	1.60

	2012
	Income (Numerator)			Weighted Average Units (Denominator)	Per Unit
Income from continuing operations net of noncontrolling interest - consolidated joint ventures	$	97,022
Less: Preferred unit distributions	(9,902		)
Excess of preferred unit carrying amount over redemption	3,689
Basic income from continuing operations
Income from continuing operations available to common unitholders	90,809			120,623	$	0.75
Dilutive units for long-term compensation plans	—			831
Diluted income from continuing operations
Income from continuing operations available to common unitholders	90,809			121,454	$	0.75
Basic income from discontinued operations
Discontinued operations	51,004			120,623	$	0.43
Dilutive units for long-term compensation plans	—			831
Diluted income from discontinued operations
Discontinued operations	51,004			121,454	$	0.42
Basic income per common unit
Income available to common unitholders	141,813			120,623	$	1.18
Dilutive units for long-term compensation plans	—			831
Diluted income per common unit
Income available to common unitholders	$	141,813		121,454	$	1.17