Debt (Tables)

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Convertible Debt

The Convertible Notes consisted of the following at September 30, 2015 (in thousands):

Liability component:
Principal	$	120,000
Less: unamortized debt discount and debt issuance costs	(39,650		)
Net carrying amount	$	80,350
Equity component	$	38,305

Interest Income and Interest Expense Disclosure

The following table sets forth total interest expense recognized related to the Convertible Notes during the three and nine months ended September 30, 2015 (in thousands):

	Three Months Ended September 30, 2015		Nine Months Ended September 30, 2015
Contractual interest expense	$	1,649	$	2,016
Amortization of debt discount	1,980		2,420
Amortization of debt issuance costs	132		161
Total interest expense	$	3,761	$	4,597