Debt And Other Long-Term Liabilities (Schedule Of Additional Information Of 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
Convertible Debt [Roll Forward]
Amortization of discount	$ 549	$ 1,789	$ 3,323	$ 5,270
Outstanding December 31, 2012 - Net			172,810
Outstanding September 30, 2013 - Net	51,625		51,625
Convertible Debt [Member]
Convertible Debt [Roll Forward]
Outstanding December 31, 2012 - Principal			184,983
Early extinguishments - Principal			(131,278)
Outstanding September 30, 2013 - Principal	53,705		53,705
Outstanding December 31, 2012 -Debt instrument, unamortized discount			(12,173)
Early extinguishments - Discount			6,770
Amortization of discount	549	1,789	3,323	5,270
Outstanding September 30, 2013 -Debt instrument, unamortized discount	(2,080)		(2,080)
Outstanding December 31, 2012 - Net			172,810
Early extinguishments - Net			(124,508)
Amortization of debt discount			3,323
Outstanding September 30, 2013 - Net	$ 51,625		$ 51,625