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Long-term Debt - Narrative (Details)
3 Months Ended 6 Months Ended 8 Months Ended 30 Months Ended
Mar. 19, 2021
USD ($)
day
$ / shares
Feb. 10, 2021
USD ($)
Jan. 30, 2018
USD ($)
$ / shares
Jan. 12, 2018
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 16, 2020
USD ($)
Feb. 10, 2021
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]                        
Letters of credit outstanding         $ 17,300,000   $ 17,300,000       $ 17,300,000  
Repayments of convertible debt             125,952,000 $ 10,595,000        
Conversion price (in dollars per share) | $ / shares $ 10.49                      
Debt instrument carried value         160,354,000   160,354,000       160,354,000 $ 165,759,000
2026 Notes                        
Debt Instrument [Line Items]                        
Debt instrument, face amount $ 135,000,000                      
Proceeds from debt, net $ 130,600,000                      
Stated interest rate 4.75%                      
Conversion ratio 0.0953516                      
Percentage of conversion price 130.00%                      
Threshold trading days | day 20                      
Threshold consecutive trading days | day 30                      
Threshold consecutive trading days, sale price per share | day 5                      
Measurement period | day 5                      
Percentage of sales price per share 98.00%                      
Amount of indebtedness in event of default $ 40,000,000.0                      
2023 Notes                        
Debt Instrument [Line Items]                        
Debt instrument, face amount     $ 200,000,000                  
Repayments of convertible debt 120,000,000.0       $ 5,952,000 $ 5,858,000 $ 125,952,000 10,595,000     $ 152,800,000  
Debt instrument, repurchased face amount $ 125,000,000.0                      
Stated interest rate         1.50%   1.50%       1.50%  
Conversion ratio     0.0222748                  
Conversion price (in dollars per share) | $ / shares     $ 44.89                  
Effective interest rate percentage     6.00%                  
Debt Instrument, principal amount repurchased         $ 6,400,000 $ 11,981,000 $ 131,400,000 $ 17,681,000     $ 174,000,000.0  
Debt instrument carried value         25,728,000   25,728,000       25,728,000 $ 143,242,000
Promissory Note                        
Debt Instrument [Line Items]                        
Debt instrument, face amount       $ 25,000,000.0                
Stated interest rate       2.50%                
Settlement costs and expenses       $ 7,500,000                
Debt instrument carried value         17,500,000   17,500,000       17,500,000  
Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity   $ 200,000,000             $ 350,000,000 $ 200,000,000    
Long-term line of credit         0   0       0  
Remaining borrowing capacity         $ 50,300,000   $ 50,300,000       $ 50,300,000  
Revolving Credit Facility | Minimum                        
Debt Instrument [Line Items]                        
Commitment fee percentage                 0.25% 0.375%    
Revolving Credit Facility | Minimum | London Interbank Offered Rate (LIBOR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate                 1.75% 2.50%    
Revolving Credit Facility | Minimum | Base Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate                 0.75% 1.50%    
Revolving Credit Facility | Maximum                        
Debt Instrument [Line Items]                        
Commitment fee percentage                 0.50% 0.50%    
Revolving Credit Facility | Maximum | London Interbank Offered Rate (LIBOR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate                 3.00% 3.75%    
Revolving Credit Facility | Maximum | Base Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate                 2.00% 2.75%    
Asset-based Revolving Credit Facility | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity   $ 125,000,000.0               $ 125,000,000.0    
Debt instrument, springing maturity, term   91 days                    
Debt instrument, amount of indebtedness subject to springing maturity   $ 17,500,000                    
Debt instrument, covenant, minimum fixed charge coverage ratio   1.0                    
Debt instrument, percentage of borrowing base outstanding subject to covenant   15.00%                    
Debt instrument, amount of borrowing base outstanding subject to covenant   $ 14,100,000                    
Asset-based Revolving Credit Facility | Revolving Credit Facility | Base Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   0.50%                    
Asset-based Revolving Credit Facility | Revolving Credit Facility | Minimum                        
Debt Instrument [Line Items]                        
Commitment fee percentage   0.375%                    
Asset-based Revolving Credit Facility | Revolving Credit Facility | Minimum | London Interbank Offered Rate (LIBOR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   2.75%                    
Asset-based Revolving Credit Facility | Revolving Credit Facility | Minimum | Base Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   1.75%                    
Asset-based Revolving Credit Facility | Revolving Credit Facility | Maximum                        
Debt Instrument [Line Items]                        
Commitment fee percentage   0.50%                    
Asset-based Revolving Credit Facility | Revolving Credit Facility | Maximum | London Interbank Offered Rate (LIBOR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   3.25%                    
Asset-based Revolving Credit Facility | Revolving Credit Facility | Maximum | Base Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   2.25%                    
Asset-based Revolving Credit Facility | Letter of Credit                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity   $ 50,000,000.0               $ 50,000,000.0