XML 68 R56.htm IDEA: XBRL DOCUMENT v3.19.2
LONG-TERM DEBT, DERIVATIVES AND LETTERS OF CREDIT - Convertible Debt (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
May 17, 2018
USD ($)
Jun. 30, 2019
USD ($)
$ / shares
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
shares
days
$ / shares
Jun. 30, 2018
USD ($)
Jul. 31, 2017
USD ($)
Debt Instrument [Line Items]            
Percentage of the maximum number of shares authorized for issuance   40.00%   40.00%    
Percentage of maximum number of shares that would require cash settlement   60.00%   60.00%    
Debt instrument, convertible, threshold percentage of stock price trigger for redemption       130.00%    
Debt instrument, convertible, threshold trading days for redemption | days       20    
Debt Instrument, Convertible, Threshold Consecutive Trading Days for redemption       30 days    
Remaining amortization period of convertible debt       49 months    
Tax impact of convertible debt embedded derivative liability reclassification to equity | $ $ 7,800          
Loss on convertible debt embedded derivative | $   $ 0 $ 29,330 $ 0 $ 24,783  
Convertible debt            
Debt Instrument [Line Items]            
Principal amount, long-term debt issued | $           $ 230,000
Interest rate on convertible debt   5.00%   5.00%   5.00%
Initial conversion rate, convertible debt       46.0829    
Initial conversion price, convertible debt | $ / shares   $ 21.70   $ 21.70    
Debt Instrument, Convertible, Threshold Trading Days | days       20    
Debt Instrument, Convertible, Threshold Consecutive Trading Days | days       30    
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger       130.00%    
Number of business days after the specified trading price criteria met that notes may be converted | days       5    
Consecutive trading days, trading price criteria       5 days    
Convertible debt, threshold percentage, product of common stock price and conversion price       98.00%    
Shares outstanding, percentage threshold       19.99%    
Convertible debt, threshold shares, approval of shareholders | shares       5,964,858    
Number of shares into which debt is convertible | shares       10,599,067    
Debt Instrument, Redemption Price, Percentage       100.00%    
Term Loan Facility            
Debt Instrument [Line Items]            
Debt term       5 years    
Revolving Credit Facility            
Debt Instrument [Line Items]            
Debt term       5 years    
Maximum | Convertible debt            
Debt Instrument [Line Items]            
Number of shares into which debt is convertible | shares       14,838,703    
Number of shares that would require cash settlement | shares       8,873,845    
Not Designated as Hedging Instrument | Embedded derivative in convertible debt            
Debt Instrument [Line Items]            
Embedded derivative liability | $ $ 45,400