Debt and Other Financing Arrangements (Tables)

12 Months Ended

Dec. 31, 2013

The net carrying amount of the liability component of the Notes as of December 31, 2013 consists of the following (in thousands):



Principal amount	$	253,000
Unamortized debt discount	(35,035		)
Net carrying value	$	217,965

Maturities of Outstanding Borrowings

Maturities of outstanding borrowings under the other debt arrangements as of December 31, 2013 were as follows for each year ending December (in thousands):



2014	$	519
2015	382
2016	10
Total long-term debt	$	911

Schedule of Debt Cost and Interest Expense Recognized

The following table presents the interest expense recognized related to the Notes for year ended December 31, 2013 (in thousands):



	Year Ended December 31,
	2013
Contractual interest expense at 1.5% per annum	$	2,045
Amortization of debt issuance costs	591
Accretion of debt discount	3,681
Total	$	6,317