• Filing Date: 2019-03-08
  • Form Type: 10-K
  • Description: Annual report
v3.10.0.1
Long-Term Debt - Summary of Equity and Liability Components of the Convertible Senior Notes (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Principal amount $ 264,995 $ 260,061
Convertible Senior Notes [Member]    
Debt Instrument [Line Items]    
Principal amount 233,740 233,740
Unamortized discount (11,316) (17,354)
Liability component - net carrying value before issuance costs 222,424 216,386
Equity component - conversion, net of offering costs $ 31,051 $ 31,051