Income per Common Unit of the Operating Partnership (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Unit, Basic and Diluted [Line Items]

Schedule of Earnings Per Share, Basic and Diluted

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

	2017					2016
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share		Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	263,805	146,742	$	1.79	$	345,108	146,204	$	2.36
Dilutive shares for long-term compensation plans	—		799			—		685
Income from continuing operations net of noncontrolling interest - diluted	$	263,805	147,541	$	1.78	$	345,108	146,889	$	2.35
Discontinued operations net of noncontrolling interest - basic	$	18,535	146,742	$	0.13	$	11,709	146,204	$	0.08
Dilutive shares for long-term compensation plans	—		799			—		685
Discontinued operations net of noncontrolling interest - diluted	$	18,535	147,541	$	0.13	$	11,709	146,889	$	0.08
Net income available to common shareholders - basic	$	282,340	146,742	$	1.92	$	356,817	146,204	$	2.44
Dilutive shares for long-term compensation plans	—		799			—		685
Net income available to common shareholders - diluted	$	282,340	147,541	$	1.91	$	356,817	146,889	$	2.43

	2015
	Income (Numerator)		Weighted Average Shares (Denominator)	Per Share
Income from continuing operations net of noncontrolling interest - basic	$	229,164	148,243	$	1.55
Dilutive shares for long-term compensation plans	—		600
Income from continuing operations net of noncontrolling interest - diluted	$	229,164	148,843	$	1.54
Discontinued operations net of noncontrolling interest - basic	$	10,319	148,243	$	0.07
Dilutive shares for long-term compensation plans	—		600
Discontinued operations net of noncontrolling interest - diluted	$	10,319	148,843	$	0.07
Net income available to common shareholders - basic	$	239,483	148,243	$	1.62
Dilutive shares for long-term compensation plans	—		600
Net income available to common shareholders - diluted	$	239,483	148,843	$	1.61

Liberty Property Limited Partnership [Member]

Earnings Per Unit, Basic and Diluted [Line Items]

Schedule of Earnings Per Share, Basic and Diluted

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):

	2017						2016
	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	$	270,585					$	353,896
Less: Preferred unit distributions	(472		)				(472		)
Income from continuing operations available to common unitholders - basic	$	270,113		150,270	$	1.79	$	353,424		149,740	$	2.36
Dilutive units for long-term compensation plans	—			799			—			685
Income from continuing operations available to common unitholders - diluted	$	270,113		151,069	$	1.78	$	353,424		150,425	$	2.35
Income from discontinued operations - basic	$	18,979		150,270	$	0.13	$	11,991		149,740	$	0.08
Dilutive units for long-term compensation plans				799						685
Income from discontinued operations - diluted	$	18,979		151,069	$	0.13	$	11,991		150,425	$	0.08
Income available to common unitholders - basic	$	289,092		150,270	$	1.92	$	365,415		149,740	$	2.44
Dilutive units for long-term compensation plans				799						685
Income available to common unitholders - diluted	$	289,092		151,069	$	1.91	$	365,415		150,425	$	2.43

	2015
	Income (Numerator)			Weighted Average Units (Denominator)	Per Unit
Income from continuing operations net of noncontrolling interest - consolidated joint ventures	$	235,110
Less: Preferred unit distributions	(472		)
Income from continuing operations available to common unitholders - basic	$	234,638		151,783	$	1.55
Dilutive units for long-term compensation plans	—			600
Income from continuing operations available to common unitholders - diluted	$	234,638		152,383	$	1.54
Income from discontinued operations - basic	$	10,565		151,783	$	0.07
Dilutive units for long-term compensation plans	—			600
Income from discontinued operations - diluted	$	10,565		152,383	$	0.07
Income available to common unitholders - basic	$	245,203		151,783	$	1.62
Dilutive units for long-term compensation plans	—			600
Income available to common unitholders - diluted	$	245,203		152,383	$	1.61