• Filing Date: 2019-03-08
  • Form Type: 10-K
  • Description: Annual report
v3.10.0.1
Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2016
Dec. 31, 2013
Debt Instrument [Line Items]        
Total principal amount $ 264,995 $ 260,061    
Less: unamortized discount and issuance costs (14,845) (22,226)    
Total long-term debt 250,150 237,835    
3.875% Convertible Senior Notes [Member]        
Debt Instrument [Line Items]        
Total principal amount 89,990 89,990 $ 89,990 $ 103,000
4.25% Convertible Senior Notes [Member]        
Debt Instrument [Line Items]        
Total principal amount 143,750 143,750    
3.95% Promissory Note [Member]        
Debt Instrument [Line Items]        
Total principal amount 9,125 9,360    
4% Promissory Note [Member]        
Debt Instrument [Line Items]        
Total principal amount 7,857 8,348    
3.75% Promissory Note [Member]        
Debt Instrument [Line Items]        
Total principal amount 8,290 $ 8,613    
4.55% Promissory note [Member]        
Debt Instrument [Line Items]        
Total principal amount 5,928      
Capital Lease Obligations [Member]        
Debt Instrument [Line Items]        
Total principal amount $ 55