Debt Instrument, Convertible, Carrying Amount Of Equity Component, Gross

No definition available.

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- Definition

Debt Instrument, Convertible, Threshold Business Days

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Interest Rate, Semi-Annual Stated Percentage

+ References

No definition available.

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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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-Name Accounting Standards Codification
-Topic 470
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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

Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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

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

+ 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.

+ Details

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- Definition

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

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- Definition

The average effective interest rate during the reporting period.

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+ Details

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- Definition

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

+ References

+ Details

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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.

+ Details

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- Definition

Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt.

+ References

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- Definition

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

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- Definition

Amount, after accumulated amortization, of debt discount.

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

+ Details

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- Definition

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

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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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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Long-Term Debt - Convertible Senior Notes Due 2025 (Details)		12 Months Ended
	May 14, 2018 USD ($) day	Sep. 30, 2018 USD ($) $ / shares	Oct. 01, 2017 $ / shares	Sep. 30, 2017 USD ($)
Debt Instrument [Line Items]
Principal amount		$ 512,554,000
Share price (usd per share) \| $ / shares			$ 9.50
Carrying value		416,883,000		$ 284,807,000
Debt discount and issuance costs		(98,223,000)		(60,534,000)
Senior Notes \| 2025 Convertible Notes
Debt Instrument [Line Items]
Stated interest rate	2.375%
Principal amount	$ 172,500,000.0	$ 172,500,000
Semi-annual interest rate	2.375%
Conversion rate per $1,000 principal amount (shares)	62.8931
Conversion price, per share (usd per share) \| $ / shares		$ 15.90
Share price (usd per share) \| $ / shares		$ 15.90
Remaining unamortized issuance discount period		7 years
Carrying value	$ 121,300,000	$ 119,736,000		0
Unamortized discount	$ 51,200,000
Equity component of debt, gross		49,600,000
Conversion feature accounted for as an equity-classified instrument		39,100,000
Debt transaction costs		$ 5,500,000
Effective interest rate		9.00%
Debt discount and issuance costs		$ (52,764,000)		$ 0
Senior Notes \| 2025 Convertible Notes \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Threshold consecutive trading days \| day	30
Threshold percentage of stock price trigger	130.00%
Repurchase price, percent of principal amount	100.00%
Debt Conversion, Condition One \| Senior Notes \| 2025 Convertible Notes
Debt Instrument [Line Items]
Threshold trading days (whether or not consecutive) \| day	20
Threshold consecutive trading days \| day	30
Threshold percentage of stock price trigger	130.00%
Debt Conversion, Condition Two \| Senior Notes \| 2025 Convertible Notes
Debt Instrument [Line Items]
Threshold consecutive trading days \| day	5
Threshold percentage of stock price trigger	98.00%
Business day threshold \| day	5
Measurement Input, Discount Rate \| Valuation Technique, Discounted Cash Flow \| Senior Notes \| 2025 Convertible Notes
Debt Instrument [Line Items]
Debt instrument, expected term input		0.08