Debt And Interest Expense Debt And Interest Expense (Proceeds Upon Issuance Of Convertible Debt) (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Aug. 31, 2007
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,250,000
Payments of Debt Issuance Costs	(25,777)
Proceeds from Convertible Debt	1,224,223
Convertible Debt [Member]
Debt Instrument [Line Items]
Proceeds from Convertible Debt	558,243
Additional Paid-in Capital [Member]
Debt Instrument [Line Items]
Proceeds from Convertible Debt	418,996
Long-term deferred tax liability [member]
Debt Instrument [Line Items]
Proceeds from Convertible Debt	267,225
Other long-term assets [Member]
Debt Instrument [Line Items]
Proceeds from Convertible Debt	(11,328)
Other Expense [Member]
Debt Instrument [Line Items]
Proceeds from Convertible Debt	$ (8,913)