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Debt (Details Narrative) - USD ($) $ in Thousands		9 Months Ended
	Jan. 23, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Debt face amount		$ 235,533		$ 224,041
Senior unsecured notes	$ 210,000	210,000		210,000
Debt instrument, term	5 years
Unsecured notes coupon rate	8.20%
Proceeds to repay outstanding indebtedness	$ 179,000
Repayment of debt	$ 59,444	5,288	$ 205,615
Capital lease obligations minimum lease payments		$ 417
Loan maturity period		Few weeks to 11 years
Debt, weighted average interest rate		7.60%
Property, Plant and Equipment [Member]
Debt instrument, collateral amount		$ 5,118		$ 4,758

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Proceeds to repay outstanding indebtedness.

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- Definition

Unsecured notes coupon rate.

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- Definition

Amount of minimum lease payments for capital leases.

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Amount of assets pledged to secure a debt instrument.

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

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- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

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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.

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Weighted average interest rate of debt outstanding.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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