Quarterly report pursuant to Section 13 or 15(d)

Debt - Narrative (Details)

v3.21.1
Debt - Narrative (Details) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
May 31, 2018
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Debt Instrument [Line Items]        
Interest on dilutive Convertible Notes due 2025, net of tax   $ 4,215,000 $ 7,134,000  
Interest Expense, Debt, Excluding Amortization   2,479,000 1,501,000  
Convertible Notes Payable        
Debt Instrument [Line Items]        
Interest on dilutive Convertible Notes due 2025, net of tax   3,700,000 4,300,000  
Amortization of debt discount and issuance costs   1,200,000 $ 2,800,000  
Line of Credit | Revolving Credit Facility        
Debt Instrument [Line Items]        
Current borrowing capacity   500,000,000.0    
Convertible Notes due 2023        
Debt Instrument [Line Items]        
Face amount   345,000,000.0   $ 345,000,000
Unamortized issuance costs on convertible notes   $ 4,503,000   4,306,000
Issuance costs $ 10,000,000.0      
Debt issuance cost 8,600,000      
Convertible debt, carrying amount of equity component, offering costs $ 1,400,000      
Effective interest rate   2.40% 6.00%  
Convertible Notes due 2025        
Debt Instrument [Line Items]        
Face amount   $ 517,500,000   517,500,000
Unamortized issuance costs on convertible notes   $ 12,802,000   11,731,000
Issuance costs       14,500,000
Debt issuance cost       12,600,000
Convertible debt, carrying amount of equity component, offering costs       $ 1,900,000
Effective interest rate   1.30%