Debt Instrument, Accordion Feature, Increase Limit

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- Definition

Debt Instrument, Convertible, Conversion Price Percentage

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Convertible, Conversion Price, Percentage Premium Of Trading Price

+ References

No definition available.

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- Definition

Debt Instrument, Convertible, Maximum Percentage Exchangeable For Common Stock

+ References

No definition available.

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- Definition

Debt Instrument, Covenant Terms, Minimum Cash Balance

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- Definition

Debt Instrument, Right Offering, Additional Borrowing Option

+ References

No definition available.

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- Definition

Debt Instrument, Third Party Backstop Commitment

+ References

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- Definition

Debt Instrument, Third Party Backstop Commitment, Option Notes Purchased

+ References

No definition available.

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- Definition

Debt Instrument, Unamortized Discount At Inception

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No definition available.

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- Definition

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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- Definition

Amount of amortization expense attributable to debt issuance costs.

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- Definition

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

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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

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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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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- Definition

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

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- Definition

The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

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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.

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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

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount, after accumulated amortization, of debt discount.

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- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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- Definition

The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

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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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- Definition

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

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Long-term Debt (Narrative) (Details)			3 Months Ended		12 Months Ended
Long-term Debt (Narrative) (Details)	May 17, 2018 USD ($) shares $ / shares	Jan. 16, 2018 USD ($) day shares $ / shares	Mar. 31, 2019 USD ($) shares	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) shares	Apr. 03, 2019 shares	Apr. 01, 2019 shares	Jan. 31, 2019	Nov. 13, 2018 USD ($)	Aug. 08, 2018 USD ($)
Schedule of Capitalization, Long-term Debt [Line Items]
Proceeds from borrowings on senior secured convertible notes (related party)			$ 0	$ 85,000,000
Issuance of PIK Interest Shares (in shares) \| shares			66,722,683		66,154,626
Debt issuance costs			$ 0	4,315,000
Amortization of deferred issuance costs			252,000	207,000
Accretion of debt discount			1,319,000	752,000
Wells Fargo Bank, N.A. \| Letter of credit
Schedule of Capitalization, Long-term Debt [Line Items]
Letters of credit outstanding			3,500,000
Convertible senior notes
Schedule of Capitalization, Long-term Debt [Line Items]
Face value of senior secured convertible notes			204,000,000		$ 204,000,000
Debt issuance discount			21,403,000		22,723,000
Amortization of deferred issuance costs			300,000	200,000
Accretion of debt discount			1,300,000	$ 800,000
Convertible senior notes \| Level 3
Schedule of Capitalization, Long-term Debt [Line Items]
Fair value of notes			207,200,000
Convertible senior notes \| Initial Notes, due January 16, 2022
Schedule of Capitalization, Long-term Debt [Line Items]
Face value of senior secured convertible notes			$ 153,500,000		$ 153,500,000
Stated interest rate			12.00%		6.00%
Debt issuance discount			$ 18,297,000		$ 19,627,000
Convertible senior notes \| Option Notes, due January 16, 2022
Schedule of Capitalization, Long-term Debt [Line Items]
Face value of senior secured convertible notes			$ 50,500,000		$ 50,500,000
Stated interest rate			12.00%		6.00%
Debt issuance discount			$ 3,106,000		$ 3,096,000
Convertible senior notes \| Starboard Value LP \| Initial Notes, due January 16, 2022
Schedule of Capitalization, Long-term Debt [Line Items]
Face value of senior secured convertible notes		$ 150,000,000.0							$ 2,000,000.0
Proceeds from borrowings on senior secured convertible notes (related party)		$ 85,000,000
Converted shares issued (in shares) \| shares		2,600,000
Value of amount of shares of common stock		$ 65,000,000
Share price (in dollars per share) \| $ / shares		$ 24.45
Debt issuance discount at inception of notes		$ 1,400,000
Right to increase borrowing		$ 50,000,000
Number of shares callable by warrants (in shares) \| shares		250,000
Conversion price, percentage premium of trading price		30.00%
Conversion threshold, consecutive trading days \| day		10
Conversion price (in dollars per share) \| $ / shares		$ 31.29
Stated interest rate		6.00%
Accrued interest liability			5,100,000
Price of warrants (in dollars per share) \| $ / shares		$ 0.01
Debt issuance discount		$ 20,100,000
Debt issuance costs		$ 4,600,000
Convertible senior notes \| Starboard Value LP \| Initial Notes, due January 16, 2022 \| Subsequent event
Schedule of Capitalization, Long-term Debt [Line Items]
Number of shares callable by warrants (in shares) \| shares						323,448
Issuance of PIK Interest Shares (in shares) \| shares							243,261
Convertible senior notes \| Starboard Value LP \| Initial Notes, due January 16, 2022 \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Conversion price (in dollars per share) \| $ / shares		$ 28.00
Stated interest rate								4.00%
Convertible senior notes \| Starboard Value LP \| Initial Notes, due January 16, 2022 \| Maximum
Schedule of Capitalization, Long-term Debt [Line Items]
Stated interest rate								12.00%
Convertible senior notes \| Starboard Value LP \| Additional Senior Secured Convertible Notes
Schedule of Capitalization, Long-term Debt [Line Items]
Face value of senior secured convertible notes										$ 2,000,000.0
Convertible senior notes \| Starboard Value LP \| Additional Initial Notes
Schedule of Capitalization, Long-term Debt [Line Items]
Face value of senior secured convertible notes										1,500,000.0
Convertible senior notes \| Starboard Value LP \| Initial Notes
Schedule of Capitalization, Long-term Debt [Line Items]
Face value of senior secured convertible notes					204,000,000.0
Proceeds from borrowings on senior secured convertible notes (related party)					100,000,000
Debt instrument, debt covenant, minimum cash balance									$ 20,000,000.0
Convertible senior notes \| Starboard Value LP \| Option Notes, due January 16, 2022
Schedule of Capitalization, Long-term Debt [Line Items]
Face value of senior secured convertible notes	$ 50,000,000
Proceeds from borrowings on senior secured convertible notes (related party)	$ 15,000,000
Converted shares issued (in shares) \| shares	1,400,000
Value of amount of shares of common stock	$ 35,000,000
Share price (in dollars per share) \| $ / shares	$ 21.75
Debt issuance discount at inception of notes	$ 4,600,000
Debt issuance discount	3,100,000
Debt issuance costs	$ 200,000
Convertible senior notes \| Starboard Value LP \| Additional Option Notes
Schedule of Capitalization, Long-term Debt [Line Items]
Face value of senior secured convertible notes										$ 500,000.0
Convertible senior notes \| Starboard Value LP \| Right Offering Notes
Schedule of Capitalization, Long-term Debt [Line Items]
Maximum percentage exchangeable for common stock		30.00%
Debt term		4 years
Conversion price percentage		130.00%
Backstop commitment by third party		$ 100,000,000
Backstop reduced by the amount of option notes purchased		50,000,000.0
Convertible senior notes \| Starboard Value LP \| Right Offering Notes \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Right to increase borrowing		$ 35,000,000.0
Conversion price (in dollars per share) \| $ / shares		$ 28.00
Convertible senior notes \| Starboard Value LP \| Right Offering Notes \| Maximum
Schedule of Capitalization, Long-term Debt [Line Items]
Additional borrowing option		$ 150,000,000.0
Debt convenant, period one \| Convertible senior notes \| Starboard Value LP \| Initial Notes
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, debt covenant, minimum cash balance			20,000,000		20,000,000.0
Debt convenant, period two \| Convertible senior notes \| Starboard Value LP \| Initial Notes
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, debt covenant, minimum cash balance			$ 40,000,000.0		$ 40,000,000.0