Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share (Tables) [Abstract]

Computation of basic and diluted earnings per share

		Three Months Ended
		March 31,
		2013		2012
Numerator for basic and diluted earnings
	per share - net income (loss) attributable
	to common stockholders	$	55,058	$	39,307
Denominator for basic earnings per
	share - weighted average shares		260,036		199,661
Effect of dilutive securities:
	Employee stock options		-		223
	Non-vested restricted shares		-		280
	Convertible senior unsecured notes		-		1,494
Dilutive potential common shares			0		1,997
Denominator for diluted earnings per
	share - adjusted weighted average shares		260,036		201,658
Basic earnings per share		$	0.21	$	0.20
Diluted earnings per share		$	0.21	$	0.19