Debt (Tables)

3 Months Ended

Mar. 31, 2014

Debt

Schedule of outstanding convertible note balances

	March 31, 2014
Liability component:
Principal	$	200,000
Less: debt discount, net	(37,439		)
Net carrying amount	$	162,561
Equity component	$	38,188

Schedule of total interest expense recognized related to the Convertible Notes

The following table sets forth total interest expense recognized related to the Convertible Notes during the three months ended March 31, 2014 (in thousands):

	March 31, 2014
Contractual interest expense	$	625
Amortization of debt issuance costs	102
Amortization of debt discount	749
Total interest expense	$	1,476