Debt And Other Long-Term Liabilities (Schedule Of Additional Information Of Convertible Debt) (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Convertible Debt [Member]
Debt Instrument [Line Items]
Ourstanding December 31, 2012 - Principal			$ 184,983
Early extinguishments - Principal			(44,607)
Oustanding March 31, 2013 - Principal			140,376
Outstanding December 31, 2012 -Debt instrument, unamortized discount			(12,173)
Early extinguishments - Discount			2,237
Amortization of debt discount			1,663
Outstanding March 31, 2013 -Debt instrument, unamortized discount			(8,273)
Outstanding December 31, 2012 - Net	132,103	172,810	172,810
Early extinguishments - Net			(42,370)
Amortization of debt discount - Net			1,663
Outstanding March 31, 2013 - Net	$ 132,103	$ 172,810	$ 132,103