Debt And Other Long-Term Liabilities (Schedule Of Interest Expense Related To Convertible Debt) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Debt Instrument [Line Items]
Amortization of debt discount	$ 549	$ 1,789	$ 3,323	$ 5,270
Convertible Debt [Member]
Debt Instrument [Line Items]
Contractual interest expense	537	2,000	3,353	6,000
Amortization of debt discount	549	1,789	3,323	5,270
Total interest expense related to convertible debt	$ 1,086	$ 3,789	$ 6,676	$ 11,270