Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Fair Value of Convertible Debt (Details)

v3.7.0.1
Fair Value Measurements - Fair Value of Convertible Debt (Details)
$ in Thousands
Jun. 30, 2017
USD ($)
Fair Value | Recurring | Level 2  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Convertible debt fair value $ 375,612
Carrying Value  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Convertible debt fair value $ 275,673