Net Income (Loss) Per Common Share

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Net Income (Loss) Per Common Share

Net Income (Loss) Per Common Share or Common Unit

Basic net income (loss) per common share or Common Unit is computed by dividing net income (loss) attributable to common shareholders or common unitholders, less dividends or distributions on share-based awards expected to vest (referred to as "participating securities" and primarily composed of unvested restricted stock units), by the weighted average number of common shares or Common Units outstanding for the period.

Diluted net income (loss) per common share is computed by dividing the sum of basic net income (loss) attributable to common shareholders and the noncontrolling interest in earnings allocable to Limited Partner Units (to the extent the Limited Partner Units are dilutive) by the sum of the weighted average number of common shares outstanding and, to the extent they are dilutive, Units outstanding and any potential dilutive securities for the period. Diluted net income (loss) per Common Unit is computed by dividing the basic net income (loss) attributable to common unitholders by the sum of the weighted average number of Common Units outstanding and any potential dilutive securities for the period. The following table reconciles the components of basic and diluted net income per common share or Common Unit for the three months ended March 31,2014 and 2013, respectively (in thousands): 

	Three Months Ended March 31,
	2014			2013
General Partner
Net income attributable to common shareholders	$	18,683		$	28,043
Less: Dividends on participating securities	(645		)	(688		)
Basic net income attributable to common shareholders	18,038			27,355
Noncontrolling interest in earnings of common unitholders	250			392
Diluted net income attributable to common shareholders	$	18,288		$	27,747
Weighted average number of common shares outstanding	327,106			314,936
Weighted average Limited Partner Units outstanding	4,387			4,405
Other potential dilutive shares	223			230
Weighted average number of common shares and potential dilutive securities	331,716			319,571
Partnership
Net income attributable to common unitholders	$	18,933		$	28,435
Less: Distributions on participating securities	(645		)	(688		)
Basic and diluted net income attributable to common unitholders	$	18,288		$	27,747
Weighted average number of Common Units outstanding	331,493			319,341
Other potential dilutive units	223			230
Weighted average number of Common Units and potential dilutive securities	331,716			319,571

Substantially all potential shares related to our stock-based compensation plans are anti-dilutive for all periods presented. The following table summarizes the data that is excluded from the computation of net income per common share or Common Unit as a result of being anti-dilutive (in thousands):

	Three Months Ended March 31,
	2014	2013
General Partner and Partnership
Potential dilutive shares or units:
Anti-dilutive outstanding potential shares or units under fixed stock option and other stock-based compensation plans	1,215	1,378
Outstanding participating securities	3,841	4,078