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Cash and Cash Equivalents and Fair Value of Financial Instruments (Details) - USD ($)
Sep. 30, 2020
Sep. 25, 2020
Dec. 31, 2019
Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash and cash equivalents $ 629,171,000   $ 127,210,000  
Interest Rate Swap        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Notional amount       $ 100,000,000.0
Fixed interest rate       0.80%
Interest Rate Swap | LIBOR        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Variable rate floor       0.00%
Convertible Senior Notes | Convertible Debt        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair value of long-term debt 592,200,000      
Carrying value of debt $ 462,115,000 $ 461,800,000