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Convertible Senior Notes - Capped Call Transactions (Details)
$ / shares in Units, $ in Thousands, shares in Millions
6 Months Ended
Jun. 08, 2020
$ / instrument
Jun. 30, 2020
USD ($)
$ / shares
shares
Debt Instrument [Line Items]    
Payment for capped call options   $ 35,679
Capped Call Transactions    
Debt Instrument [Line Items]    
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    
Debt Instrument [Line Items]    
Cap price (in dollars per share) | $ / instrument 86.30  
Percentage of premium on share price 100.00%