Long-term Debt (Tables)

9 Months Ended

Sep. 30, 2015

Long-Term Debt

Our long-term debt consisted of the following at September 30, 2015 and December 31, 2014:

In thousands	2015			2014
Convertible notes, net	$	162,293		$	156,154
Royalty financing, net		46,483			—
Facility lease obligation		220,612			196,027
		429,388			352,181
Less current portion		(9,666	)		(6,707	)
	$	419,722		$	345,474

Outstanding Convertible Note Balances

The outstanding convertible note balances as of September 30, 2015 and December 31, 2014 consisted of the following:

In thousands	2015			2014
Principal	$	200,000		$	200,000
Less: debt discount, net		(37,707	)		(43,846	)
Net carrying amount	$	162,293		$	156,154

Interest Expense Related to Convertible Notes

Interest expense related to the convertible notes during for the three-month and nine-month periods ended September 30, 2015 consisted of the following:

	Three Months Ended September 30,				Nine Months Ended September 30,
In thousands	2015		2014		2015		2014
Contractual interest expense	$	1,813	$	1,812	$	5,438	$	2,074
Amortization of debt discount		2,058		1,872		6,032		2,141
Amortization of debt issuance costs		36		33		105		38
	$	3,907	$	3,717	$	11,575	$	4,253