Debt - Narrative (Details) $ / shares in Units, shares in Millions			3 Months Ended	9 Months Ended
	Sep. 17, 2021 USD ($) d $ / shares shares	Jul. 01, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)		Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jul. 27, 2020 USD ($)	Jul. 26, 2020 USD ($)
Debt Instrument [Line Items]
Payment for purchase of capped calls	$ 36,000,000			$ 36,030,000	$ 0	[1]
Debt issuance costs				12,636,000	1,264,000	[1]
Payment of debt extinguishment costs				$ 0	2,050,000	[1]
Call Option
Debt Instrument [Line Items]
Strike price (in dollars per share) | $ / shares	$ 49.99
Initial cap price (in dollars per share) | $ / shares	$ 71.42
Shares covered (in shares) | shares	7.5
Payment for capped calls	$ 36,000,000
Convertible Debt | Convertible Senior Notes Due 2026
Debt Instrument [Line Items]
Principal amount	$ 373,800,000
Interest rate	0.125%
Proceeds from offering	$ 361,400,000
Number of trading days | d	20
Number of consecutive trading days | d	30
Threshold percentage of stock price	130.00%
Conversion ratio	0.0200024
Conversion price (in dollars per share) | $ / shares	$ 49.99
Premium percentage of stock price	40.00%
Redemption price percentage	100.00%
Redemption threshold amount	$ 50,000,000
Fundamental change, threshold percentage	100.00%
Debt issuance costs			$ 12,400,000
Effective interest rate			0.81%	0.81%
Debt issuances costs capitalized			$ 12,300,000	$ 12,300,000
Debt outstanding			361,500,000	361,500,000
Convertible Debt | Convertible Senior Notes Due 2026 | Circumstance One
Debt Instrument [Line Items]
Number of trading days | d	20
Number of consecutive trading days | d	30
Threshold percentage of stock price	130.00%
Convertible Debt | Convertible Senior Notes Due 2026 | Circumstance Two
Debt Instrument [Line Items]
Number of trading days | d	5
Number of consecutive trading days | d	10
Threshold percentage of stock price	98.00%
Convertible Debt | Convertible Senior Notes Due 2026 | Level 2
Debt Instrument [Line Items]
Fair value of debt			389,000,000	389,000,000
Line of Credit
Debt Instrument [Line Items]
Debt issuance costs in other assets			1,000,000	1,000,000				$ 1,100,000
Revolving Credit Facility | 364-Day Facility | Line of Credit
Debt Instrument [Line Items]
Proceeds to repay debt	$ 250,000,000
Debt term		364 days
Principal amount		$ 250,000,000
Payment of debt extinguishment costs		$ 400,000
Debt issuance costs							$ 700,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity									$ 150,000,000	$ 15,000,000
Debt issuance costs					$ 1,300,000
Letter of Credit | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity									25,000,000
Debt outstanding			$ 1,000,000	$ 1,000,000				$ 1,000,000
Foreign Line of Credit | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity									50,000,000
Term Loan | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity										$ 205,000,000
Minimum | Term Loan | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity per incremental loan									$ 5,000,000

[1] Certain prior period amounts have been revised to correct immaterial errors. See Note 1 for more information.