Net Income (Loss) Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Net Income (Loss) Per Share [Abstract]

Reconciliation Of Earnings Attributable To Common Stockholders, Basic And Diluted

	Three Months Ended March 31, 2012
	Continuing Operations			Discontinued Operations			Total
	(in thousands)
Net income attributable to common stockholders	$	203,924		$	10,695		$	214,619
Participating basic earnings		(2,326	)		(122	)		(2,448	)
Basic income attributable to common stockholders		201,598			10,573			212,171
Reallocation of participating earnings		68			3			71
Diluted income attributable to common stockholders	$	201,666		$	10,576		$	212,242

	Three Months Ended March 31, 2011
	Continuing Operations			Discontinued Operations			Total
	(in thousands)
Net income (loss) attributable to common stockholders	$	(71,288	)	$	419,882		$	348,594
Participating basic earnings		—			(6,140	)		(6,140	)
Basic net income (loss) attributable to common stockholders		(71,288	)		413,742			342,454
Reallocation of participating earnings		—			—			—
Diluted income (loss) attributable to common stockholders	$	(71,288	)	$	413,742		$	342,454

Reconciliation Of Basic To Diluted Weighted Average Common Shares Outstanding

	Three Months Ended March 31,
	2012		2011
	(in thousands)
Weighted average common shares outstanding:
Basic		122,480		115,869
Dilutive common stock options (a)		150		—
Convertible senior notes dilution		3,460		—
Contingently issuable performance unit shares		157		—
Diluted		126,247		115,869

(a) Options to purchase 98,819 shares of the Company's common stock at $113.77 were excluded from the diluted income per share calculations for the three months ended March 31, 2012 because they would have been anti-dilutive to the calculation.