Convertible Senior Notes (Tables)

3 Months Ended

Mar. 31, 2018

Carrying Value of Convertible Senior Notes

The carrying value of the Company’s convertible senior notes is as follows:

	March 31, 2018			December 31, 2017
2.125% Convertible Senior Notes due 2021:
Principal amount	$	114,989		$	115,000
Unamortized debt discount		(12,513	)		(13,395	)
Unamortized debt issuance costs		(2,200	)		(2,355	)
Total convertible senior notes	$	100,276		$	99,250