Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share (Tables) [Abstract]

Computation of basic and diluted earnings per share

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
Numerator for basic and diluted earnings
	per share - net income (loss) attributable
	to common stockholders	$	20,691	$	37,269	$	67,245	$	131,308
Denominator for basic earnings per
	share - weighted average shares		286,020		224,391		273,148		212,592
Effect of dilutive securities:
	Employee stock options		196		238		235		240
	Non-vested restricted shares		567		301		417		293
	Convertible senior unsecured notes		1,246		1,328		1,447		950
Dilutive potential common shares			2,009		1,867		2,099		1,483
Denominator for diluted earnings per
	share - adjusted weighted average shares		288,029		226,258		275,247		214,075
Basic earnings per share		$	0.07	$	0.17	$	0.25	$	0.62
Diluted earnings per share		$	0.07	$	0.16	$	0.24	$	0.61