XML 59 R49.htm IDEA: XBRL DOCUMENT v3.21.1
Debt - Narrative (Details)
1 Months Ended 3 Months Ended
Aug. 24, 2020
USD ($)
financial_ratio
Apr. 30, 2018
USD ($)
day
shares
$ / shares
May 02, 2021
USD ($)
$ / shares
Jan. 31, 2021
May 03, 2020
USD ($)
Sep. 30, 2020
USD ($)
Apr. 04, 2018
Debt Instrument [Line Items]              
Proceeds from borrowing     $ 0   $ 4,950,000    
Debt issuance costs, net of amortization   $ 12,900,000          
Closing price of stock (in dollars per share) | $ / shares     $ 20.22        
Revolving Credit Facility              
Debt Instrument [Line Items]              
Term of credit facility 5 years            
Senior secured revolving credit facility maximum capacity $ 300,000,000.0            
Credit facility maturity period prior to stated maturity if out of compliance with liquidity threshold 91 days            
Credit facility, daily minimum sum of cash and cash equivalents and aggregate unused commitments to prevent maturity prior to stated maturity $ 625,000,000.0            
Credit facility, amount borrowed           $ 250,000,000.0  
Interest during the period (percent)     1.61%        
Interest expense     $ 1,000,000.0        
Number of financial ratios | financial_ratio 2            
Consolidated leverage ratio, maximum       4.5      
Interest coverage ratio, minimum       3      
Revolving Credit Facility | Minimum              
Debt Instrument [Line Items]              
Commitment Fee (percent) 0.25%            
Revolving Credit Facility | Maximum              
Debt Instrument [Line Items]              
Commitment Fee (percent) 0.40%            
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Interest Rate Floor              
Debt Instrument [Line Items]              
Effective interest rate (percent) 0.00%            
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum              
Debt Instrument [Line Items]              
Margin rate (percent) 1.50%            
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum              
Debt Instrument [Line Items]              
Margin rate (percent) 2.25%            
Revolving Credit Facility | Base Rate | Minimum              
Debt Instrument [Line Items]              
Margin rate (percent) 0.50%            
Revolving Credit Facility | Base Rate | Maximum              
Debt Instrument [Line Items]              
Margin rate (percent) 1.25%            
Capped Call              
Debt Instrument [Line Items]              
Payment for purchase of capped calls   64,600,000          
Convertible Senior Notes              
Debt Instrument [Line Items]              
Debt issuance costs, net of amortization   9,800,000 $ 4,181,000   4,671,000    
Additional Paid-in Capital              
Debt Instrument [Line Items]              
Debt issuance costs, net of amortization   $ 3,068,000          
Class A              
Debt Instrument [Line Items]              
Conversion price (in dollars per share) | $ / shares   $ 26.27          
Closing price of stock (in dollars per share) | $ / shares     $ 20.22        
Class A | Capped Call              
Debt Instrument [Line Items]              
Exercise price (in dollars per share) | $ / shares   $ 39.66          
Exercise price premium percentage over last reported sales price             100.00%
Convertible Senior Notes              
Debt Instrument [Line Items]              
Principal amount   $ 575,000,000.0          
Interest rate (as a percent)   0.125%          
Proceeds from borrowing   $ 562,100,000          
Conversion percentage of principal amount plus accrued and unpaid contingent interest   100.00%          
Convertible debt, fair value based on the closing trading price per $100 of the Notes     $ 612,400,000        
If-converted value     $ 442,500,000        
Remaining term of the notes     23 months        
Interest expense     $ 7,425,000   $ 7,113,000    
Convertible Senior Notes | Class A              
Debt Instrument [Line Items]              
Number of convertible shares at initial conversion rate (in shares) | shares   21,884,155          
Conversion ratio (in shares)   38.0594          
Conversion price (in dollars per share) | $ / shares   $ 26.27          
Redemption percentage of principal amount of Notes to be redeemed   100.00%          
Convertible Senior Notes | Class A | Any Fiscal Quarter Commencing After the Fiscal Quarter Ending on July 31, 2018              
Debt Instrument [Line Items]              
Threshold trading days | day   20          
Threshold consecutive trading days | day   30          
Threshold percentage of stock price trigger   130.00%          
Convertible Senior Notes | Class A | Five Business Day Period After any Five Consecutive Trading Day Period              
Debt Instrument [Line Items]              
Threshold consecutive trading days | day   5          
Threshold percentage of stock price trigger   98.00%          
Threshold business days | day   5          
Convertible Senior Notes | Class A | Immediately Preceding the Date on Which We Provide Notice of Redemption              
Debt Instrument [Line Items]              
Threshold trading days | day   2