Debt - Summary of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Apr. 12, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Current portion of long term debt	$ 3,191		$ 0
Debt instrument discount	600
Long-term debt	163,758		233,154
7.875% senior secured notes due April 15, 2019 \| Senior Notes
Debt Instrument [Line Items]
Carrying Amount	$ 0		233,154
Interest on Senior Secured Notes (as a percent)	7.875%	7.875%
Term Loan Facility \| Secured Debt
Debt Instrument [Line Items]
Carrying Amount	$ 166,949		$ 0
Current portion of long term debt	3,200
Deferred financing cost, current	600
Debt instrument discount	3,000
Long-term debt	163,800
Deferred financing cost, noncurrent	2,200
Debt discount, noncurrent	$ 2,400

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

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Amount, after accumulated amortization, of debt discount.

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Amount of debt discount to be amortized after one year or the normal operating cycle, if longer.

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

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

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

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