Convertible Senior Notes (Tables)

9 Months Ended

Sep. 30, 2018

Carrying Value of Convertible Senior Notes

The carrying value of the Notes is as follows (amounts in thousands):

	September 30, 2018			December 31, 2017
2.125% Convertible Senior Notes due 2021:
Principal amount	$	114,989		$	115,000
Unamortized debt discount		(10,706	)		(13,395	)
Unamortized debt issuance costs		(1,883	)		(2,355	)
Total Convertible Senior Notes	$	102,400		$	99,250
Less: Current portion		(102,400	)		—
Total Convertible Senior Notes, long-term	$	—		$	99,250