Debt (Tables)

6 Months Ended

Jun. 30, 2014

Debt

Schedule of outstanding convertible note balances

Our outstanding convertible note balances as June 30, 2014 consisted of the following (in thousands):

	June 30, 2014
Liability component:
Principal	$	200,000
Less: debt discount, net	(35,867		)
Net carrying amount	$	164,133
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 and six months ended June 30, 2014 (in thousands):

	Three Months Ended June 30, 2014		Six Months Ended June 30, 2014
Contractual interest expense	$	1,250	$	1,875
Amortization of debt issuance costs	228		330
Amortization of debt discount	1,573		2,322
Total interest expense	$	3,051	$	4,527