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Debt And Other Long-Term Liabilities (Schedule Of Interest Expense Related To Convertible Debt) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Debt Instrument [Line Items]
Amortization of Debt Discount (Premium)	$ 1,663	$ 1,717
Convertible Debt [Member]
Debt Instrument [Line Items]
Contractual interest expense	1,701	2,000
Amortization of Debt Discount (Premium)	1,663	1,717
Total interest expense related to convertible debt	$ 3,364	$ 3,717

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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