Quarterly report pursuant to Section 13 or 15(d)

Convertible Senior Notes (Details)

v3.7.0.1
Convertible Senior Notes (Details)
$ / shares in Units, $ in Thousands
2 Months Ended 3 Months Ended
Mar. 31, 2017
USD ($)
Mar. 28, 2017
Mar. 31, 2017
USD ($)
Jan. 19, 2017
$ / shares
Dec. 31, 2016
USD ($)
Debt Instrument, Redemption [Line Items]          
Debt Instrument, Maturity Date     Jan. 15, 2022    
Debt Instrument, Convertible, Conversion Ratio 100.1049 100      
Debt Instrument, Convertible, Principal Amount For Conversion Ratio $ 1   $ 1    
Proceeds from convertible senior notes     282,185    
Debt Instrument, Convertible, Conversion Price | $ / shares       $ 10.00  
Convertible senior notes 282,263   282,263   $ 0
Convertible Debt [Member]          
Debt Instrument, Redemption [Line Items]          
Debt Instrument, Face Amount $ 287,500   $ 287,500    
Debt Instrument, Interest Rate, Stated Percentage 6.25%   6.25%    
Over-Allotment Option [Member] | Convertible Debt [Member]          
Debt Instrument, Redemption [Line Items]          
Debt Instrument, Face Amount $ 37,500   $ 37,500