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Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (17,887)us-gaap_NetIncomeLoss	$ (923)us-gaap_NetIncomeLoss	$ 16,244us-gaap_NetIncomeLoss
Other comprehensive income (loss):
Pension liability adjustment, net of tax	(587)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	913us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	138us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
Deferred gain (loss) on cash flow derivatives, net of tax	15us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	99us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	(99)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
Other comprehensive income (loss)	(572)us-gaap_OtherComprehensiveIncomeLossNetOfTax	1,012us-gaap_OtherComprehensiveIncomeLossNetOfTax	39us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive income (loss)	$ (18,459)us-gaap_ComprehensiveIncomeNetOfTax	$ 89us-gaap_ComprehensiveIncomeNetOfTax	$ 16,283us-gaap_ComprehensiveIncomeNetOfTax

X

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.

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