Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jun. 30, 2017
Accounting Policies [Abstract]
Deferred Taxes – Valuation Allowance	Deferred Taxes – Valuation Allowance Accounting Standards Codification (“ASC”) Topic 740, Income Taxes, provides the carrying value of deferred tax assets should be reduced by the amount not expected to be realized. A company should reduce deferred tax assets by a valuation allowance if, based on the weight of all available evidence, it is not more likely than not that some portion or all of the deferred tax assets will be realized. The valuation allowance should be sufficient to reduce the deferred tax asset to the amount that is more likely than not to be realized. ASC 740 requires all available evidence, both positive and negative, be considered to determine whether a valuation allowance for deferred tax assets is needed in the financial statements. Additionally there can be statutory limitations and losses also assessed on the deferred tax assets should certain conditions arise. As a result of the significant decline in oil and gas activities and net losses incurred over the several quarters prior to the first quarter of 2017, we determined during the three months ended March 31, 2017 that it was more likely than not that a portion of our deferred tax assets will not be realized in the future. Our valuation allowance against a portion of our deferred taxes as of June 30, 2017 was $19,703. Our assessment of the realizability of our deferred tax assets is based on the weight of all available evidence, both positive and negative, including future reversals of deferred tax liabilities.
Restricted Cash	Restricted Cash As a result of the repayment of the Wells Fargo term loan, combined with the continued use of letters of credit and corporate cards with Wells Fargo (see Note 7), a portion of the Company’s cash balance is now restricted to its use in order to provide collateral to Wells Fargo. As of June 30, 2017 and December 31, 2016, restricted cash was $11,266 and $0, respectively.
Lower of Cost or Market Adjustments	Lower of Cost or Market Adjustments As of June 30, 2017 and 2016, the Company reviewed the carrying values of all inventories and concluded that no adjustments were warranted for finished goods and raw materials intended for use in the Company’s manufacturing process.
Manufacturing Production Levels Below Normal Capacity	Manufacturing Production Levels Below Normal Capacity As a result of the Company substantially reducing manufacturing production levels, including by idling certain facilities, certain production costs have been expensed instead of being capitalized into inventory. The Company expenses fixed production overhead amounts in excess of amounts that would have been allocated to each unit of production at normal production levels. For the three months ended June 30, 2017 and 2016, the Company expensed $10,797 and $13,515, respectively, in production costs. For the six months ended June 30, 2017 and 2016, the Company expensed $22,009 and $23,222, respectively, in production costs.
Long-lived and other noncurrent assets impairment considerations	Long-lived and other noncurrent assets impairment considerations As noted, the Company has temporarily idled production at various manufacturing facilities, including throughout 2017 and 2016. The Company does not assess temporarily idled assets for impairment unless events or circumstances indicate that the carrying amounts of those assets may not be recoverable. Short-term stoppages of production for less than one year do not generally significantly impact the long-term expected cash flows of the idled facility. As of March 31, 2016, as a result of changes in the planned usage of certain long-term bauxite raw materials, the Company evaluated the carrying value of those bauxite raw materials. Based upon this evaluation, during the three months ended March 31, 2016, the Company recognized an impairment charge of $1,065 on these bauxite raw material inventories. At December 31, 2016, as a result of the continued and severity of the market downturn, the Company identified indicators of impairments related to each of its domestic manufacturing plant asset groups. The Company completed undiscounted cash flow analyses on that date and determined no impairment charge was necessary at that time. As of June 30, 2017, the Company concluded that there were no events or circumstances that would indicate that carrying amounts of long-lived and other noncurrent assets might be impaired given that results for the first six months of 2017 met our expectations from our analysis as of December 31, 2016 and given that our future outlook has not significantly changed since that date. However, the Company continues to monitor market conditions closely. Further deterioration of market conditions could result in impairment charges being taken on the Company’s long-lived and other noncurrent assets, including the Company’s manufacturing plants, goodwill and intangible assets. The Company will evaluate long-lived and other noncurrent assets for impairment at such time that events or circumstances indicate that carrying amounts might be impaired.