Debt (Tables)

12 Months Ended

Dec. 31, 2011

Debt (Tables) [Abstract]

Debt and capital lease obligations related to continuing operations

	2011			2010
$925 Million Credit Facility	$	600,000		$	—
$1.0 Billion Credit Facility		—			700,000
3.75% Convertible Senior Notes, net of unamortized discount of $40,754 and $53,449		319,246			306,551
6.75% Senior Notes		152,180			152,180
Capital lease obligations		2,399			484
Total debt		1,073,825			1,159,215
Less amounts due within one year		(755	)		(58,574	)
Total long-term debt	$	1,073,070		$	1,100,641

Annual maturities of long-term debt, excluding capital lease obligations

	$925 Million Credit  Facility		3.75% Convertible Senior Notes		6.75% Senior Notes		Total
2012	$	—	$	—	$	—	$	—
2013		—		—		—		—
2014		—		360,000		152,180		512,180
2015		600,000		—		—		600,000
2016		—		—		—		—
Years thereafter		—		—		—		—
Total	$	600,000	$	360,000	$	152,180	$	1,112,180