Debt (Tables)

3 Months Ended

Mar. 31, 2015

Debt

Schedule of outstanding convertible note balances

	March 31, 2015
Liability component:
Principal	$	200,000
Less: debt discount, net	(30,910		)
Net carrying amount	$	169,090
Equity component	$	38,188

Schedule of total interest expense recognized related to the Convertible Notes

	Three Months Ended March 31, 2015
Contractual interest expense	$	1,250
Amortization of debt issuance costs	234
Amortization of debt discount	1,649
Total interest expense	$	3,133