Net Income (Loss) Per Common Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Net income (loss) attributable to common shareholders	$	(32,076	)	$	34,064		$	(13,549	)	$	(23,591	)
Less: Dividends on participating securities	(811		)	(694		)	(2,416		)	(1,699		)
Basic net income (loss) attributable to common shareholders	(32,887		)	33,370			(15,965		)	(25,290		)
Noncontrolling interest in earnings of common unitholders	—			1,041			—			—
Diluted net income (loss) attributable to common shareholders	$	(32,887	)	$	34,411		$	(15,965	)	$	(25,290	)
Weighted average number of common shares outstanding	252,802			251,866			252,618			234,468
Weighted average partnership Units outstanding	—			5,517			—			—
Other potential dilutive shares	—			—			—			—
Weighted average number of common shares and potential dilutive securities	252,802			257,383			252,618			234,468

Computation of Anti-Dilutive Common Share

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011			2010
Noncontrolling interest in earnings of common unitholders	$	(868	)	$	—	$	(369	)	$	(620	)
Weighted average partnership Units outstanding	7,064			—		6,887			6,172
Other potential dilutive shares:
Anti-dilutive outstanding potential shares under fixed stock option plans	1,677			1,779		1,677			1,779
Anti-dilutive potential shares under the Exchangeable Notes	3,432			4,045		3,432			4,045
Outstanding participating securities	4,840			4,137		4,840			4,137