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.

+ References

No definition available.

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- Definition

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

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Borrowings - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Oct. 23, 2017
Debt Instrument [Line Items]
Principal amount	$ 101,700
2021 Notes
Debt Instrument [Line Items]
Principal amount	$ 18,690	$ 23,690	$ 23,700
Senior notes, effective interest rate	5.75%		5.75%
Maturity date	Oct. 23, 2021
Facility Financing Obligation
Debt Instrument [Line Items]
Principal amount	$ 11,495	54,407
2019 notes
Debt Instrument [Line Items]
Principal amount	$ 9,000	39,400
Senior notes, effective interest rate	9.75%
Tranche B notes
Debt Instrument [Line Items]
Principal amount	$ 2,500	$ 15,000
Senior notes, effective interest rate	8.75%