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Convertible Notes (Tables)

9 Months Ended

Sep. 30, 2011

Convertible Notes

Schedule of convertible notes

(in thousands)		As of September 30, 2011			As of December 31, 2010
5% Convertible Senior Notes due 2014 (the “2014 Notes”)		$	172,500		$	172,500
Unamortized discount		(42,146		)	(51,000		)
Total convertible notes		$	130,354		$	121,500
Less current portion		—			—
Total long-term convertible notes		$	130,354		$	121,500

Schedule of interest expense on notes

		Three Months Ended September 30,						Nine Months Ended September 30,
		2011			2010			2011			2010
		(In thousands)
2014 Notes coupon interest at a rate of 5%		$	2,156		$	2,156		$	6,468		$	6,468
2014 Notes amortization of discount at an additional effective interest rate of 11.7%		3,254			2,797			9,326			7,283
Zero Coupon Convertible Senior Notes due 2010 amortization of discount at an effective interest rate of 8.4%		—			—			—			958
Total interest expense on convertible notes		$	5,410		$	4,953		$	15,794		$	14,709

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