Earnings (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of antidilutive securities excluded from computation of earnings per share

Securities convertible into shares of common stock that were not considered in calculating earnings (loss) per common share, as inclusion would be anti-dilutive, are as follows (in thousands):



	December 31,
	2012	2011	2010
Stock options under long-term incentive plans	—	—	1,605
Stock warrants related to sale of preferred stock	—	—	5,853
Convertible senior notes (if converted)	—	4,681	4,879
Convertible preferred stock (if converted)	—	—	4,872
	—	4,681	17,209

Components of basic and diluted earnings per common share

Basic and diluted earnings (loss) per common share are as follows (in thousands, except per share data):



	Year ended December 31,
	2012		2011		2010
Net income (loss) attributable to common stockholders - Basic	$	49,791	$	26,540	$	(50,008	)
Impact of assumed conversions:
Interest on convertible notes	1,959		—		—
Dividends on preferred stock	—		141		—
Net income (loss) attributable to common stockholders - Diluted	$	51,750	$	26,681	$	(50,008	)

Weighted average common shares outstanding - Basic	48,185		44,229		25,731
Assumed conversions:
Incremental common shares from warrants	1,560		2,222		—
Incremental common shares from stock options	992		747		—
Incremental common shares from convertible preferred stock before conversion	—		440		—
Incremental common shares from restricted stock units	116		—		—
Incremental common shares from convertible senior notes	2,701		—		—
Weighted average common shares outstanding - Diluted	53,554		47,638		25,731

Basic earnings (loss) per common share	$	1.03	$	0.60	$	(1.94	)
Diluted earnings (loss) per common share	$	0.97	$	0.56	$	(1.94	)