Net Income (Loss) Per Common Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Reconciling the Components of Basic and Diluted Net Income (Loss) per Common Share

	Three Months Ended March 31,
	2012			2011
Net income (loss) attributable to common shareholders	$	(36,390	)	$	47,569
Less: Dividends on participating securities	(852		)	(799		)
Basic net income (loss) attributable to common shareholders	(37,242		)	46,770
Noncontrolling interest in earnings of common unitholders	—			1,205
Diluted net income (loss) attributable to common shareholders	$	(37,242	)	$	47,975
Weighted average number of common shares outstanding	258,365			252,406
Weighted average partnership Units outstanding	—			6,384
Other potential dilutive shares	—			47
Weighted average number of common shares and potential dilutive securities	258,365			258,837

Computation of Anti-Dilutive Common Share

	Three Months Ended March 31,
	2012			2011
Noncontrolling interest in earnings of common unitholders	$	(811	)	$	—
Weighted average partnership Units outstanding	5,749			—
Other potential dilutive shares:
Anti-dilutive outstanding potential shares under fixed stock option and other stock-based compensation plans	1,733			1,711
Anti-dilutive potential shares under the Exchangeable Notes	—			3,432
Outstanding participating securities	5,051			4,752