Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Narrative (Details)

v3.20.1
Fair Value Measurements - Narrative (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Fair Value Measurements    
Convertible Notes due 2023 $ 308,262 $ 305,513
Revolving credit facility balance 290,000 260,000
2023 Convertible Notes    
Fair Value Measurements    
Debt instrument, fair value disclosure 369,074 414,852
2023 Convertible Notes | Carrying Value    
Fair Value Measurements    
Convertible Notes due 2023 308,262 305,513
Second Amended and Restated Credit Agreement    
Fair Value Measurements    
Revolving credit facility balance $ 290,000 $ 260,000