Income Tax Examination, Number of Examinations

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

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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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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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Income Taxes - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) examination	Sep. 30, 2016 USD ($)	Apr. 12, 2017	Dec. 31, 2016 USD ($)
Income Tax Contingency [Line Items]
Tax examinations in process \| examination			1
Unrecognized tax benefits	$ 500		$ 500			$ 600
Accrued unrecognized tax benefits interest and penalties	200		200			$ 200
Tax reserves released			200
Income tax benefit	$ (2,437)	$ 1,480	$ (2,498)	$ (461)
7.875% senior secured notes due April 15, 2019 \| Senior Notes
Income Tax Contingency [Line Items]
Interest on Senior Secured Notes (as a percent)	7.875%	7.875%	7.875%	7.875%	7.875%