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Convertible Senior Notes - Capped Call Transactions (Details)
$ / shares in Units, $ in Thousands, shares in Millions
1 Months Ended 12 Months Ended
Jun. 08, 2020
$ / instrument
Jun. 30, 2020
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
Long-Term Debt      
Payment for capped call options     $ 35,679
Capped Call Transactions      
Long-Term Debt      
Payment for capped call options   $ 35,700  
Initial strike price (in dollars per share) | $ / shares   $ 56.10  
Number of shares of common stock initially underlying the Convertible Notes | shares   5.1  
Reduction in additional paid-in capital   $ (35,700)  
Capped Call Transactions | Common Stock      
Long-Term Debt      
Cap price (in dollars per share) | $ / instrument 86.30    
Percentage of premium on share price 100.00%