Cash payments for convertible debt settlement of conversions.

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Class of warrant or rights expiry month and year.

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Debt instrument convertible outstanding amount for which conversion notices received.

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Debt instrument convertible percentage of conversion notices from notes holders.

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Base principal amount per note.

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Line of credit facility expiration month and year.

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Number of common stock to be purchased.

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Number of securities received in settlement of convertible note hedge transaction.

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Repayments of convertible debt principal amount outstanding.

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Amount of excess of issue price over par or stated value of stock and from other transaction involving stock or stockholder. Includes, but is not limited to, additional paid-in capital (APIC) for common and preferred stock.

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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Amount of the total principal payments made during the annual reporting period.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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The amount of the liability for the conversion option reclassified to stockholders' equity when the embedded option no longer required separation from the host instrument.

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Indebtedness (Details Textual)			1 Months Ended			12 Months Ended
Indebtedness (Details Textual)	Mar. 15, 2021 USD ($) shares	Jun. 01, 2020 USD ($) d $ / shares shares	Mar. 31, 2020 USD ($) d $ / shares shares	Feb. 29, 2020 USD ($)	Mar. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) d shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($)	Dec. 31, 2016 USD ($)	Jan. 02, 2021 USD ($)	Jan. 01, 2021 USD ($)	Sep. 11, 2020 shares	Sep. 10, 2020 shares	Sep. 09, 2020 shares	Mar. 18, 2016 shares
Debt Instrument [Line Items]
Proceeds from issuance of convertible debt, net of issuance costs							$ 873,848,000
Retained earnings						$ 45,708,000	45,322,000
Reclassification into temporary equity							4,697,000
Carrying value						$ 884,984,000	$ 1,411,529,000
Stock price \| $ / shares							$ 56.33
Cash proceeds from the sale of warrants							$ 93,915,000
Aggregate cash payments for settlement of convertible notes							$ 147,825,000
Common stock, shares authorized \| shares						150,000,000	150,000,000						150,000,000	120,000,000
Revolving Senior Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity				$ 550,000,000.0
Credit facility, expiration date				2025-02
Loan outstanding							$ 0	$ 0
Revolving Senior Credit Facility [Member] \| Federal Funds Effective Rate [Member]
Debt Instrument [Line Items]
Credit facility bear interest rate				0.50%
Revolving Senior Credit Facility [Member] \| Eurocurrency Rate [Member]
Debt Instrument [Line Items]
Credit facility bear interest rate				1.00%
Multicurrency Borrowings [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity				$ 250,000,000.0
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity				50,000,000.0
Swing Line Loans [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity				$ 5,000,000.0
2021 Warrants [Member]
Debt Instrument [Line Items]
Cash proceeds from the sale of warrants					$ 44,900,000
Warrant strike price \| $ / shares					$ 80.00
2023 Warrants [Member]
Debt Instrument [Line Items]
Cash proceeds from the sale of warrants		$ 46,800,000
Warrant strike price \| $ / shares		$ 104.84
2025 Warrants [Member]
Debt Instrument [Line Items]
Cash proceeds from the sale of warrants			$ 47,100,000
Warrant strike price \| $ / shares			$ 127.84
2021 Hedge [Member]
Debt Instrument [Line Items]
Number of common stock to be purchased \| shares					10,865,270
Stock price \| $ / shares					$ 59.82
Derivative, maturity date					Mar. 15, 2021
Number of common shares received in settlement of convertible note hedge transaction \| shares	842
2023 Hedge [Member]
Debt Instrument [Line Items]
Amount reclassified to stockholders' equity							37,300,000
Number of common stock to be purchased \| shares		5,345,010
Stock price \| $ / shares		$ 84.19
Cost of hedge transaction		$ 69,500,000
Derivative, maturity date		Jun. 01, 2023
2025 Hedge [Member]
Debt Instrument [Line Items]
Number of common stock to be purchased \| shares			4,823,910
Stock price \| $ / shares			$ 93.29
Derivative, maturity date			Mar. 15, 2025
Minimum [Member] \| Revolving Senior Credit Facility [Member]
Debt Instrument [Line Items]
Unused line fee				0.35%
Minimum [Member] \| Revolving Senior Credit Facility [Member] \| Eurocurrency Rate [Member]
Debt Instrument [Line Items]
Credit facility bear interest rate				1.50%
Minimum [Member] \| Revolving Senior Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Credit facility bear interest rate				0.50%
Minimum [Member] \| 2021 Warrants [Member]
Debt Instrument [Line Items]
Class of warrant or rights expiry month and year					2021-06
Minimum [Member] \| 2023 Warrants [Member]
Debt Instrument [Line Items]
Class of warrant or rights expiry month and year		2023-09
Minimum [Member] \| 2025 Warrants [Member]
Debt Instrument [Line Items]
Class of warrant or rights expiry month and year			2025-06
Maximum [Member] \| Revolving Senior Credit Facility [Member]
Debt Instrument [Line Items]
Unused line fee				0.50%
Maximum [Member] \| Revolving Senior Credit Facility [Member] \| Eurocurrency Rate [Member]
Debt Instrument [Line Items]
Credit facility bear interest rate				2.25%
Maximum [Member] \| Revolving Senior Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Credit facility bear interest rate				1.25%
Maximum [Member] \| 2021 Warrants [Member]
Debt Instrument [Line Items]
Class of warrant or rights expiry month and year					2021-12
Maximum [Member] \| 2023 Warrants [Member]
Debt Instrument [Line Items]
Class of warrant or rights expiry month and year		2023-11
Maximum [Member] \| 2025 Warrants [Member]
Debt Instrument [Line Items]
Class of warrant or rights expiry month and year			2025-10
Cumulative Effect, Period of Adoption, Adjustment [Member] \| ASU 2020-06 [Member]
Debt Instrument [Line Items]
Convertible debt liabilities										$ 115,400,000
Retained earnings										64,500,000
Deferred tax liabilities										(28,000,000.0)
Additional Paid In Capital										$ (147,200,000)
Additional Paid-in Capital [Member] \| 2021 Hedge [Member]
Debt Instrument [Line Items]
Cost of hedge transaction									$ 111,200,000
Additional Paid-in Capital [Member] \| 2025 Hedge [Member]
Debt Instrument [Line Items]
Cost of hedge transaction							$ 78,300,000
Common Stock [Member]
Debt Instrument [Line Items]
Common stock, shares authorized \| shares													150,000,000	120,000,000
Common Stock [Member] \| 2023 Warrants [Member]
Debt Instrument [Line Items]
Number of preferred or common stock into which the warrants is converted \| shares		3,093,500
Common Stock [Member] \| 2023 Warrants [Member] \| 2023 Counterparties [Member]
Debt Instrument [Line Items]
Number of preferred or common stock into which the warrants is converted \| shares												6,948,512
Common Stock [Member] \| Maximum [Member] \| 2021 Warrants [Member]
Debt Instrument [Line Items]
Number of preferred or common stock into which the warrants is converted \| shares															10,865,270
Common Stock [Member] \| Maximum [Member] \| 2023 Warrants [Member]
Debt Instrument [Line Items]
Number of preferred or common stock into which the warrants is converted \| shares							5,345,010
Common Stock [Member] \| Maximum [Member] \| 2025 Warrants [Member]
Debt Instrument [Line Items]
Number of preferred or common stock into which the warrants is converted \| shares			4,823,910
Convertible Notes due 2023 [Member]
Debt Instrument [Line Items]
Convertible note hedge transactions purchase of common stock \| shares						5,345,010
2.25% Senior Convertible Notes [Member] \| Convertible Notes due 2021 [Member]
Debt Instrument [Line Items]
Principal amount					$ 650,000,000.0	$ 650,000,000.0	$ 650,000,000
Interest rate on convertible notes					2.25%	2.25%	2.25%
Debt instrument, maturity date					Mar. 15, 2021
Proceeds from issuance of convertible debt, net of issuance costs					$ 634,100,000
Initial conversion rate adjustment, shares					16.7158
Principal amount of debt considered for conversion rate					$ 1,000
Initial conversion price of convertible notes \| $ / shares					$ 59.82
Contractual coupon interest expense						$ 3,000,000.0	$ 14,600,000	14,600,000
Amortization of debt discount (premium)							18,600,000	17,600,000
Amortization of debt issuance costs						$ 800,000	$ 3,400,000	$ 3,200,000
Effective interest rate						2.90%	5.80%
Principal payments due						$ 0
Reclassification into temporary equity						4,700,000
Carrying value						$ 645,300,000	$ 645,303,000
Percentage of conversion notices from notes holders	1.40%
Outstanding amount for which conversion notices received	$ 9,100,000
Aggregate cash payments for settlement of convertible notes	649,400,000
Cash payments for outstanding principal amount	640,900,000
Cash payments for settlement of conversions	$ 8,500,000
2.25% Senior Convertible Notes [Member] \| Convertible Notes due 2021 [Member] \| Scenario Two [Member]
Debt Instrument [Line Items]
Consecutive trading days considered for debt conversion \| d						5
2.25% Senior Convertible Notes [Member] \| Convertible Notes due 2021 [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Percentage of conversion price						130.00%
2.25% Senior Convertible Notes [Member] \| Convertible Notes due 2021 [Member] \| Minimum [Member] \| Scenario One [Member]
Debt Instrument [Line Items]
Consecutive trading days considered for debt conversion \| d						20
2.25% Senior Convertible Notes [Member] \| Convertible Notes due 2021 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Percentage of conversion price						98.00%
2.25% Senior Convertible Notes [Member] \| Convertible Notes due 2021 [Member] \| Maximum [Member] \| Scenario One [Member]
Debt Instrument [Line Items]
Consecutive trading days considered for debt conversion \| d						30
2.25% Senior Convertible Notes [Member] \| Convertible Notes due 2021 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member] \| ASU 2020-06 [Member]
Debt Instrument [Line Items]
Convertible debt liabilities											$ 3,900,000
Retained earnings											47,800,000
Deferred tax liabilities											(900,000)
Additional Paid In Capital											(46,100,000)
2.25% Senior Convertible Notes [Member] \| Convertible Notes due 2021 [Member] \| Additional Paid-in Capital [Member]
Debt Instrument [Line Items]
Amount reclassified to stockholders' equity									$ 84,800,000
2.25% Senior Convertible Notes [Member] \| Convertible Notes due 2021 [Member] \| Common Stock [Member]
Debt Instrument [Line Items]
Convertible note hedge transactions purchase of common stock \| shares	837
1.00% Senior Convertible Notes [Member] \| Convertible Notes due 2023 [Member]
Debt Instrument [Line Items]
Principal amount		$ 450,000,000.0
Interest rate on convertible notes		1.00%
Debt instrument, maturity date		Jun. 01, 2023
Proceeds from issuance of convertible debt, net of issuance costs		$ 436,700,000
Initial conversion rate adjustment, shares		11.8778
Principal amount of debt considered for conversion rate		$ 1,000
Initial conversion price of convertible notes \| $ / shares		$ 84.19
Contractual coupon interest expense						$ 4,500,000	2,600,000
Amortization of debt discount (premium)						4,500,000	10,400,000
Amortization of debt issuance costs						$ 4,500,000	$ 2,200,000
Effective interest rate						2.00%	6.80%
Principal payments due		$ 0
Fair value of embedded conversion derivative		57,200,000
1.00% Senior Convertible Notes [Member] \| Convertible Notes due 2023 [Member] \| Scenario Two [Member]
Debt Instrument [Line Items]
Principal amount of debt considered for conversion rate		$ 1,000
Consecutive trading days considered for debt conversion \| d		5
1.00% Senior Convertible Notes [Member] \| Convertible Notes due 2023 [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Percentage of conversion price		130.00%
1.00% Senior Convertible Notes [Member] \| Convertible Notes due 2023 [Member] \| Minimum [Member] \| Scenario One [Member]
Debt Instrument [Line Items]
Consecutive trading days considered for debt conversion \| d		20
1.00% Senior Convertible Notes [Member] \| Convertible Notes due 2023 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Percentage of conversion price		98.00%
1.00% Senior Convertible Notes [Member] \| Convertible Notes due 2023 [Member] \| Maximum [Member] \| Scenario One [Member]
Debt Instrument [Line Items]
Consecutive trading days considered for debt conversion \| d		30
1.00% Senior Convertible Notes [Member] \| Convertible Notes due 2023 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member] \| ASU 2020-06 [Member]
Debt Instrument [Line Items]
Convertible debt liabilities											46,800,000
Retained earnings											7,900,000
Deferred tax liabilities											(11,200,000)
Additional Paid In Capital											$ (43,500,000)
1.00% Senior Convertible Notes [Member] \| Convertible Notes due 2023 [Member] \| Additional Paid-in Capital [Member]
Debt Instrument [Line Items]
Amount reclassified to stockholders' equity						$ 37,300,000
0.375% Senior Convertible Notes [Member] \| Convertible Notes due 2025 [Member]
Debt Instrument [Line Items]
Principal amount			$ 450,000,000.0			$ 450,000,000	$ 450,000,000
Interest rate on convertible notes			0.375%			0.375%	0.375%
Debt instrument, maturity date			Mar. 15, 2025
Proceeds from issuance of convertible debt, net of issuance costs			$ 437,000,000.0
Initial conversion rate adjustment, shares			10.7198
Principal amount of debt considered for conversion rate			$ 1,000
Initial conversion price of convertible notes \| $ / shares			$ 93.29
Contractual coupon interest expense						$ 1,700,000	$ 1,400,000
Amortization of debt discount (premium)						2,700,000	11,900,000
Amortization of debt issuance costs						$ 2,700,000	$ 1,500,000
Effective interest rate						1.00%	4.90%
Percentage of conversion price			130.00%
Debt redemption price percentage			100.00%
Principal payments due			$ 0
Carrying value						$ 441,527,000	$ 374,112,000
0.375% Senior Convertible Notes [Member] \| Convertible Notes due 2025 [Member] \| Scenario Two [Member]
Debt Instrument [Line Items]
Principal amount of debt considered for conversion rate			$ 1,000
Consecutive trading days considered for debt conversion \| d			5
0.375% Senior Convertible Notes [Member] \| Convertible Notes due 2025 [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Consecutive trading days considered for debt conversion \| d			20
Percentage of conversion price			130.00%
0.375% Senior Convertible Notes [Member] \| Convertible Notes due 2025 [Member] \| Minimum [Member] \| Scenario One [Member]
Debt Instrument [Line Items]
Consecutive trading days considered for debt conversion \| d			20
0.375% Senior Convertible Notes [Member] \| Convertible Notes due 2025 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Consecutive trading days considered for debt conversion \| d			30
Percentage of conversion price			98.00%
0.375% Senior Convertible Notes [Member] \| Convertible Notes due 2025 [Member] \| Maximum [Member] \| Scenario One [Member]
Debt Instrument [Line Items]
Consecutive trading days considered for debt conversion \| d			30
0.375% Senior Convertible Notes [Member] \| Convertible Notes due 2025 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member] \| ASU 2020-06 [Member]
Debt Instrument [Line Items]
Convertible debt liabilities						64,700
Retained earnings						8,800
Deferred tax liabilities						15,900
Additional Paid In Capital						57,600
0.375% Senior Convertible Notes [Member] \| Convertible Notes due 2025 [Member] \| Additional Paid-in Capital [Member]
Debt Instrument [Line Items]
Amount reclassified to stockholders' equity						$ 78,300,000