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Convertible Notes (Tables)

6 Months Ended

Jun. 30, 2011

Convertible Notes

Schedule of convertible notes

(in thousands)		As of June 30,  2011			As of December 31,  2010
5% Convertible Senior Notes due 2014 (the “2014 Notes”)		$	172,500		$	172,500
Unamortized discount		(45,242		)	(51,000		)
Total convertible notes		$	127,258		$	121,500
Less current portion		—			—
Total long-term convertible notes		$	127,258		$	121,500

Schedule of interest expense on notes

		Three Months Ended  June 30,						Six Months Ended  June 30,
		2011			2010			2011			2010
		(In thousands)
2014 Notes coupon interest at a rate of 5%		$	2,156		$	2,156		$	4,312		$	4,312
2014 Notes amortization of discount at an additional effective interest rate of 11.7%		3,056			1,584			6,072			4,486
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		$	5,212		$	3,740		$	10,384		$	9,756

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