Debt Instrument, Convertible Trading Days Following Effective Date Of Mergers

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- Definition

Debt Instrument, Event Of Default Minimum Percentage Of Principal Amount

+ References

No definition available.

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- Definition

Debt Instrument, Percentage Of Repurchase Price To Principal Amount If Company Defaults

+ References

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- Definition

Debt Instrument, Percentage Of Repurchase Price To Principal Amount If Company Undergoes Fundamental Change

+ References

No definition available.

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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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

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

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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.

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Debt - Convertible Senior Notes Narrative (Details)			6 Months Ended
Debt - Convertible Senior Notes Narrative (Details)	Jun. 30, 2018 USD ($) $ / shares	Nov. 16, 2017	Jun. 30, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($)	Jan. 31, 2017 USD ($)	Jul. 31, 2014 USD ($)
Debt Instrument [Line Items]
Convertible senior notes	$ 574,993,000		$ 574,993,000	$ 575,000,000
Debt instrument, percentage of repurchase price to principal amount if company undergoes fundamental change	100.00%		100.00%
Debt instrument, event of default minimum percentage of principal amount	25.00%		25.00%
Debt instrument, percentage of repurchase price to principal amount if company defaults	100.00%		100.00%
3.00% Convertible Senior Note \| 2019 Convertible Notes
Debt Instrument [Line Items]
Convertible senior notes	$ 229,993,000		$ 229,993,000	230,000,000		$ 230,000,000
Stated interest rate	3.00%		3.00%			3.00%
Debt instrument, convertible, conversion ratio	0.0530969		53.0969
Debt instrument, convertible conversion price (in dollars per share) \| $ / shares	$ 18.83		$ 18.83
Debt instrument, convertible trading days following effective date of mergers		35 days
3.50% Convertible Senior Note \| 2022 Convertible Notes
Debt Instrument [Line Items]
Convertible senior notes	$ 345,000,000		$ 345,000,000	$ 345,000,000	$ 345,000,000
Stated interest rate	3.50%		3.50%		3.50%
Debt instrument, convertible, conversion ratio	0.0437694		43.7694
Debt instrument, convertible conversion price (in dollars per share) \| $ / shares	$ 22.85		$ 22.85
Debt instrument, convertible trading days following effective date of mergers		35 days