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Debt - Narrative (Details)		1 Months Ended			6 Months Ended	18 Months Ended
	Jan. 01, 2021 USD ($)	Apr. 30, 2022 USD ($)	Sep. 30, 2019 USD ($) D $ / shares	Aug. 31, 2015 USD ($) D $ / shares	Jun. 30, 2022 USD ($)	Mar. 14, 2022	Dec. 31, 2021 USD ($)
Long-term debt
Long-term debt					$ 282,460,000		$ 281,894,000
Current portion of long-term debt					149,908,000		149,540,000
Additional paid-in capital					2,184,230,000		2,123,606,000
1.50% Convertible senior notes due 2026
Long-term debt
Term of the convertible notes	7 years
Debt discount to be amortized	$ 0
Incremental interest rate per annum						0.50%
Additional interest paid		$ 2,100,000
3.00% Convertible senior notes due 2022
Long-term debt
Term of the convertible notes	7 years
Debt discount to be amortized	$ 0
Convertible debt | 1.50% Convertible senior notes due 2026
Long-term debt
Net carrying amount					282,460,000		281,894,000
Debt principal amount			$ 287,500,000		$ 287,500,000		287,500,000
Debt instrument additional amount available for repurchase			$ 37,500,000
Interest rate ( as a percent )			1.50%		1.50%
Net proceeds from issuance of convertible notes			$ 279,300,000
Trading days, number | D			20
Consecutive trading days, period | D			30
Stock price trigger			130.00%
Business days, period			5 days
Consecutive trading-day period			5 days
Maximum product of the closing sale price of shares of the Company's common stock and the applicable conversion rate for such trading day			98.00%
Conversion ratio			19.0404
Conversion price per share (in dollars per share) | $ / shares			$ 52.52
Convertible instruments principal and unpaid interest payable upon events of default			100.00%
Minimum percentage of principal held by convertible debt instrument holders required to issue notice for declaration of principal and unpaid interest payable upon events of default			25.00%
Term of the convertible notes			7 years	7 years	4 years 2 months 12 days
Equity component of convertible notes, net			$ 123,000,000.0
Net deferred tax liability in connection with convertible notes			$ 25,300,000
Convertible debt | 1.50% Convertible senior notes due 2026 | Redemption on or after September 20, 2023
Long-term debt
Trading days, number | D			19
Consecutive trading days, period | D			30
Stock price trigger			130.00%
Redemption price as percent of principal amount			100.00%
Sinking fund			$ 0
Convertible debt | 3.00% Convertible senior notes due 2022
Long-term debt
Net carrying amount					$ 149,908,000		149,540,000
Debt principal amount				$ 150,000,000.0	$ 150,000,000		$ 150,000,000
Interest rate ( as a percent )				3.00%
Net proceeds from issuance of convertible notes				$ 145,400,000
Conversion ratio				17.7487
Conversion price per share (in dollars per share) | $ / shares				$ 56.34
Convertible instruments principal and unpaid interest payable upon events of default				100.00%
Minimum percentage of principal held by convertible debt instrument holders required to issue notice for declaration of principal and unpaid interest payable upon events of default				25.00%
Term of the convertible notes				7 years
Equity component of convertible notes, net				$ 57,500,000
Net deferred tax liability in connection with convertible notes				$ 22,300,000
Remaining contractual life of the convertible notes					1 month 6 days
Convertible debt | 3.00% Convertible senior notes due 2022 | Redemption on or after August 20, 2018
Long-term debt
Trading days, number | D				19
Consecutive trading days, period | D				30
Stock price trigger				130.00%
Redemption price as percent of principal amount				100.00%
Redemptions of convertible notes					$ 0
Sinking fund				$ 0
Cumulative Effect Adjustment | 1.50% Convertible senior notes due 2026
Long-term debt
Additional paid-in capital	(123,000,000.0)
Amortization of debt discount	16,100,000
Cumulative Effect Adjustment | 3.00% Convertible senior notes due 2022
Long-term debt
Additional paid-in capital	(57,500,000)
Amortization of debt discount	$ 38,700,000

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