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Convertible Notes (Tables)

3 Months Ended

Mar. 31, 2012

Convertible Notes

Schedule of convertible notes

(Dollars in thousands)		As of March 31, 2012			As of December 31, 2011
5% Convertible Senior Notes due 2014 (the “2014 Notes”)		$	172,500		$	172,500
Unamortized discount		(35,655		)	(39,007		)
Total convertible notes		$	136,845		$	133,493
Less current portion		—			—
Total long-term convertible notes		$	136,845		$	133,493

Schedule of interest expense on notes

		Three Months Ended March 31,
		2012			2011
		(in thousands)
2014 Notes coupon interest at a rate of 5%		$	2,157		$	2,156
2014 Notes amortization of discount at an additional effective interest rate of 11.7%		3,510			3,016
Total interest expense on convertible notes		$	5,667		$	5,172

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Tabular disclosure of the amounts of interest expense related to convertible notes during the reporting period.

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Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.

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