Quarterly report pursuant to Section 13 or 15(d)

Debt - Schedule of Notes (Details)

v3.19.1
Debt - Schedule of Notes (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
2025 Senior Notes    
Issuance of 4.50% convertible notes $ 200,293 $ 55,000
Debt Issuance Cost    
Amortization of debt discount and debt issuance costs 405 $ 43
Total    
Equity component 50,852  
Senior Notes    
2025 Senior Notes    
Beginning balance 0  
Issuance of 4.50% convertible notes 200,000  
Ending balance 200,000  
Discount    
Beginning balance 0  
Issuance of 4.50% convertible notes (52,600)  
Amortization of debt discount and debt issuance costs 897  
Ending balance (51,703)  
Debt Issuance Cost    
Beginning balance 0  
Issuance of 4.50% convertible notes (5,720)  
Amortization of debt discount and debt issuance costs 97  
Ending balance (5,623)  
Total    
Beginning balance 0  
Issuance of 4.50% convertible notes 141,680  
Amortization of debt discount and debt issuance costs 994  
Ending balance $ 142,674