Applicable Conversion Price, Percentage

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- Definition

Applicable Conversion Price Threshold, Percentage

+ References

No definition available.

+ Details

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- Definition

Debt Conversion, If Converted Value of Security Above Principal Amount of Underlying Debt, Amount

+ References

No definition available.

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- Definition

Maximum Days After Any Five Trading Day Period In Which Trading Price Was Less Than 97 Percent Of Last Reported Sale Price of Common Stock Times Conversion Rate

+ References

No definition available.

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- Definition

Net Cost Of Convertible Note Hedge And Warrants

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No definition available.

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- Definition

Payments For Call Options Related to Convertible Debt

+ References

No definition available.

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- Definition

Percentage Above Sales Price

+ References

No definition available.

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- Definition

Premium Percentage On Shares Issued from Conversion of Convertible Debt

+ References

No definition available.

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- Definition

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

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-Topic 235
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- Definition

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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- Definition

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

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- Definition

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

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- Definition

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.

+ References

No definition available.

+ Details

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- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

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- Definition

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

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- Definition

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

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- Definition

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

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- Definition

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.

+ References

No definition available.

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- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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Debt and Credit Arrangements - 2024 Notes (Details) $ / shares in Units, shares in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) day $ / shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($)	Nov. 06, 2017 USD ($)	Oct. 31, 2017 $ / shares
Debt Instrument
Share price (usd per share) \| $ / shares	$ 65.03
Non cash payment for derivative instrument	$ 0	$ 59,500,000	$ 0
Proceeds from issuance of warrants	$ 0	46,000,000	$ 0
Convertible Debt \| Convertible Notes, due 2024
Debt Instrument
Debt instrument stated interest rate (percent)	1.00%			1.00%
Principal amount	$ 258,800,000	258,800,000		$ 258,750,000
Share conversion rate	0.0170285
Debt instrument, conversion price (usd per share) \| $ / shares	$ 58.725
Debt instrument, conversion premium (percentage)	35.00%
Share price (usd per share) \| $ / shares					$ 43.50
Value of securities above principal amount of debt if converted	$ 27,800,000
Debt instrument, threshold for trading days \| day	20
Debt instrument, threshold for consecutive trading days \| day	30
Applicable conversion price threshold (as percentage)	130.00%
Maximum days after five trading days	5 days
Applicable conversion price, less than (as percentage)	97.00%
Debt instrument effective interest rate	4.80%
Non cash payment for derivative instrument		$ 59,500,000
Number of shares underlying warrant (shares) \| shares		4,410
Proceeds from issuance of warrants		$ 46,000,000
Warrant exercise price (usd per share) \| $ / shares					$ 71.775
Percentage above previous sales price					65.00%
Net cost of convertible note hedge and warrant		$ 13,500,000
Convertible Debt \| Convertible Notes, due 2024 \| Liability Component
Debt Instrument
Principal amount	$ 200,100,000
Debt issuance costs				5,300,000
Convertible Debt \| Convertible Notes, due 2024 \| Equity Component
Debt Instrument
Principal amount	$ 58,700,000
Debt issuance costs				$ 1,500,000