Convertible Notes (Tables)

12 Months Ended

Dec. 31, 2011

Convertible Notes [Abstract]

Principal amount Unamortized debt discount and Net Carrying amount of liability Component

	2011			2010
	(In thousands)
Principal amount	$	350,000		$	350,000
Unamortized debt discount		(55,939	)		(69,604	)
Net liability	$	294,061		$	280,396

Effective Interest Rate and components of interest expense of 2015 notes

	2011		2010
	(In thousands, except percentages)
Effective interest rate		8.1%		8.1%
Contractual interest expense	$	9,157	$	5,005
Amortization of debt discount	$	13,665	$	7,035

Remaining consideration remitted allocated to debt component of notes

	2011 Notes			2013 Notes			Total
	(In thousands)
Principal amount repurchased	$	100,000		$	105,539		$	205,539
Amount allocated to:
Extinguishment of liability component	$	95,865		$	90,881		$	186,746
Extinguishment of equity component		2,285			3,333			5,618
Total cash paid for repurchase	$	98,150		$	94,214		$	192,364
Principal amount repurchased	$	100,000		$	105,539		$	205,539
Unamortized debt discount		(6,958	)		(15,780	)		(22,738	)
Extinguishment of liability component		(95,865	)		(90,881	)		(186,746	)
Related debt issuance costs		(676	)		(1,084	)		(1,760	)
Loss on early extinguishment of debt	$	(3,499	)	$	(2,206	)	$	(5,705	)

Balance and significant terms of 2011 Notes and 2013 Notes

	2011			2010
	(In thousands)
Equity component – included in common stock	$	63,027		$	111,375
Principal amount	$	144,461		$	294,461
Unamortized debt discount		(12,719	)		(25,373	)
Liability component	$	131,742		$	269,088

Effective interest rate and components of interest expense of 2011 and 2013 notes

	2011		2010		2009
	(In thousands, except percentages)
Effective interest rate		6.3%		6.3%		6.3%
Contractual interest expense	$	4,119	$	5,579	$	7,159
Amortization of debt discount	$	12,654	$	16,055	$	19,440