Earnings Per Share

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Earnings Per Share

15. Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011		2010			2011		2010
Numerator for basic and diluted earnings per share — net income (loss) attributable to common stockholders	$	36,607	$	(4,563	)	$	129,826	$	66,893
Denominator for basic earnings per share — weighted average shares		177,272		125,298			169,636		124,132
Effect of dilutive securities:
Employee stock options		172		—			180		112
Non-vested restricted shares		258		—			241		416
Convertible senior unsecured notes		147		—			244		—
Dilutive potential common shares		577		—			665		528
Denominator for diluted earnings per share — adjusted weighted average shares		177,849		125,298			170,301		124,660
Basic earnings per share	$	0.21	$	(0.04	)	$	0.77	$	0.54
Diluted earnings per share	$	0.21	$	(0.04	)	$	0.76	$	0.54

The diluted earnings per share calculations exclude the dilutive effect of 0 and 381,000 stock options for the three and nine months ended September 30, 2011 and 2010, respectively, because the exercise prices were more than the average market price. The Series H Cumulative Convertible and Redeemable Preferred Stock and Series I Cumulative Convertible Perpetual Preferred Stock were not included in the 2011 calculation as the effect of conversions into common stock was anti-dilutive for that period.