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Subsequent Events (Details)		12 Months Ended
	Jan. 26, 2021 USD ($) share_rate day $ / shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 25, 2021 USD ($)
Subsequent Event [Line Items]
Payment of capped call transaction costs		$ 1,373,000	$ 0	$ 0
Payments of debt issuance costs		$ 432,000	$ 0	$ 0
Subsequent Event
Subsequent Event [Line Items]
Capped call transaction, cap price (USD per share) | $ / shares	$ 72.9795
Capped call, premium above share price, percentage	65.00%
Subsequent Event | 2026 Notes | Convertible Debt
Subsequent Event [Line Items]
Debt instrument, face amount	$ 690,000,000
Debt instrument, interest rate, stated percentage	0.125%
Payment of capped call transaction costs	$ 25,530,000
Repayment of credit facility	250,500,000
Payments of debt issuance costs	$ 18,030,000
Debt instrument, convertible, threshold percentage of stock price trigger	130.00%
Debt instrument, convertible, threshold trading days | day	20
Debt instrument, convertible, threshold consecutive trading days | day	30
Debt instrument, redemption price, percentage	98.00%
Debt instrument, convertible, number of equity instruments, conversion rate | share_rate	15.5925
Debt instrument, convertible, conversion price (USD per share) | $ / shares	$ 64.13
Number of trading days after maturity date, debt redeemable	40 days
Subsequent Event | 2026 Notes | Convertible Debt | Debt Conversion Terms One
Subsequent Event [Line Items]
Debt instrument, convertible, threshold trading days | day	20
Debt instrument, convertible, threshold consecutive trading days | day	30
Subsequent Event | 2026 Notes | Convertible Debt | Debt Conversion Terms Two
Subsequent Event [Line Items]
Debt instrument, convertible, threshold consecutive business days | day	5
Debt instrument, convertible, threshold consecutive trading days, after threshold consecutive business days | day	10
Subsequent Event | Revolving Credit Facility | New Credit Facility | Line of Credit
Subsequent Event [Line Items]
Maximum borrowing capacity					$ 850,000,000

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