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Convertible Notes (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Schedule of convertible notes

The Company’s convertible notes are shown in the following table:



(In thousands)		As of September 30, 2013				As of December 31, 2012
5% Convertible Senior Notes due 2014		$	172,500			$	172,500
1.125% Convertible Senior Notes due 2018		138,000				—
Total principal amount of convertible notes		$	310,500			$	172,500

Unamortized discount - 2014 Notes		$	(12,769	)		$	(24,944	)
Unamortized discount - 2018 Notes		(29,684		)		—
Total unamortized discount		$	(42,453	)		$	(24,944	)

Total convertible notes		$	268,047			$	147,556
Less current portion		159,731				—
Total long-term convertible notes		$	108,316			$	147,556

Schedule of interest expense on notes

Interest expense related to the notes for the three and nine months ended September 30, 2013 and 2012 was as follows:



	Three Months Ended								Nine Months Ended
	September 30,								September 30,
	2013				2012				2013				2012
	(In thousands)
2014 Notes coupon interest at a rate of 5%	$	2,156			$	2,156			$	6,469			$	6,469
2014 Notes amortization of discount and debt issuance costs at an additional effective interest rate of 11.7%	4,416				3,789				12,650				10,856
2018 Notes coupon interest at a rate of 1.125%	$	194			$	—			$	194			$	—
2018 Notes amortization of discount and debt issuance costs at an additional effective interest rate of 5.5%	$	719			$	—			$	719			$	—
Total interest expense on convertible notes	$	7,485			$	5,945			$	20,032			$	17,325