Statement of Financial Position [Abstract] Assets Assets [Abstract] Cash and cash equivalents Accounts receivable, net of allowances of $0 and $0 at June 30, 2014 and December 31, 2013, respectively Accounts receivable – related parties Inventory Income tax receivable Prepaid expenses Marketable securities Other current assets Total current assets Property, plant and equipment, net Other assets Total noncurrent assets Total Assets Liabilities and Stockholders’ Equity Liabilities and Stockholders’ Equity [Abstract] Accounts payable Accounts payable – related parties Current deferred income tax liability Deferred revenue – short-term Contingent liability – short-term Accrued expenses and other current liabilities Carrying value as of the balance sheet date of obligations incurred and payable to related parties, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued expenses and other current liabilities – related parties Total current liabilities Deferred revenue – long-term Other noncurrent liabilities Noncurrent deferred income tax liability Total noncurrent liabilities Total liabilities Commitments and contingencies Preferred stock, $0.0001 par value, 5,000,000 shares authorized, none issued and outstanding Common stock, $0.0001 par value, 75,000,000 shares authorized, 43,606,118 and 43,342,830 issued and outstanding as of June 30, 2014 and December 31, 2013, respectively Accumulated other comprehensive income Additional paid in capital Retained earnings Total stockholders’ equity Total Liabilities and Stockholders’ Equity Accounts receivable net allowances (in Dollars) Preferred stock par value (in Dollars per share) Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Common stock par value (in Dollars per share) Common stock shares authorized Common stock shares issued Common stock shares outstanding Income Statement [Abstract] Revenues Revenues – related parties Cost of goods sold Total costs incurred from related parties related to goods produced and sold during the reporting period. Cost of goods sold – related parties Distribution Cost incurred from related parties during the reporting period in transporting goods and services to customers. Includes freight-out costs. Distribution – related parties Gross profit Selling, general, and administrative expenses Selling, general, and administrative expenses [Abstract] Compensation expense (inclusive of $204 of stock based compensation for the three months ended June 30, 2014) Other expense Related party expense Research and development expenses Income from operations Interest and dividend income Interest expense Gain on marketable securities Other income Income before income taxes Provision for income taxes Net income Earnings per common share Earnings per common share [Abstract] Basic (in Dollars per share) Diluted (in Dollars per share) Weighted average shares outstanding Weighted average shares outstanding [Abstract] Basic (in Shares) Diluted (in Shares) Comprehensive Income Comprehensive Income [Abstract] Other comprehensive income/(loss) from unrealized net gains/(losses) on available-for-sale securities, net of tax of $1,597 in 2014 and of ($1,143) in 2013 Comprehensive income Other comprehensive income/(loss) – unrealized gains/(losses) on available-for-sale securities, tax Statement of Cash Flows [Abstract] Cash flows provided by operating activities Cash flows provided by operating activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to reconcile net income to net cash provided by operating activities: [Abstract] Depreciation Benefit for deferred income taxes The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments in marketable securities and derivative instruments held at each balance sheet date and included in earnings for the period. Change in fair value of derivative instruments Impairment of fixed assets Gain on the sale of investments Losses on disposals of fixed assets Stock based compensation Noncash interest expense Changes in operating assets and liabilities: Changes in operating assets and liabilities: [Abstract] Accounts receivable Accounts receivable – related parties Inventory Income tax receivable Prepaid expenses Accrued interest on marketable securities Other assets Accounts payable Accounts payable – related parties Income taxes payable Accrued expenses and other current liabilities Accrued expenses and other current liabilities – related parties Deferred revenue Net cash provided by operating activities Cash flows from/(used in) investing activities Cash flows from/(used in) investing activities [Abstract] Collateralization of derivative instruments Purchase of marketable securities Proceeds from the sale of marketable securities Capital expenditures Net cash provided by/(used in) investing activities Cash flows from/(used in) financing activities Cash flows from/(used in) financing activities [Abstract] Proceeds from the issuance of stock Minimum tax withholding on stock options exercised Excess tax benefits associated with stock options Payment of dividends Net cash (used in)/provided by financing activities Net change in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash paid for income taxes Disclosure Text Block [Abstract] Nature of Operations [Text Block] Inventory Disclosure [Abstract] Inventory Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Disclosure Text Block Supplement [Abstract] Cash, Cash Equivalents, and Marketable Securities [Text Block] Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Text Block] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Comprehensive Income (Loss) Note [Text Block] Legal Matters and Contingencies [Text Block] Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Schedule of Inventory, Current [Table Text Block] Schedule of Derivative Instruments [Table Text Block] Marketable Securities [Table Text Block] Schedule of Accrued Liabilities [Table Text Block] Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Carrying Values of Inventory Carrying Values of Inventory [Abstract] At average cost (approximates current cost) At average cost (approximates current cost) [Abstract] Finished goods Work in process Raw materials and supplies LIFO reserve Total inventory Carrying Value of Derivative Instruments Carrying Value of Derivative Instruments [Abstract] Derivative, Name [Domain] Derivative [Table] Derivative [Line Items] Quantity (Contracts) Long/(Short) Fair Value (in Dollars) Marketable Securities Marketable Securities [Abstract] Major Types of Debt and Equity Securities [Domain] Note 4 - Marketable Securities (Details) - Marketable Securities [Table] Note 4 - Marketable Securities (Details) - Marketable Securities [Line Items] Adjusted cost Unrealized Gains Unrealized Losses Fair Value Accrued Expenses and Other Current Liabilities Accrued Expenses and Other Current Liabilities [Abstract] Accrued employee liabilities Accrued property, use, and franchise taxes Other Total Leverage Ratio Leverage Ratio [Abstract] Credit Facility [Domain] Variable Rate [Domain] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Line Items] Variable Rate Margin Summary of Provisions for Income Taxes Summary of Provisions for Income Taxes [Abstract] Effective tax rate Computation of Basic and Diluted Earnings Per Common Share Computation of Basic and Diluted Earnings Per Common Share [Abstract] Net income available to common stockholders (in Dollars) Weighted average number of common shares outstanding Effect of stock options and other awards Weighted average diluted number of common shares outstanding Basic earnings per share (in Dollars per share) Diluted earnings per share (in Dollars per share) Revenues by Geographical Areas Revenues by Geographical Areas [Abstract] Consolidation Items [Domain] Geographical [Domain] Note 9 - Segment Information (Details) - Revenues by Geographical Areas [Table] Note 9 - Segment Information (Details) - Revenues by Geographical Areas [Line Items] Revenues Summary of Business by Segment Summary of Business by Segment [Abstract] Segments [Domain] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Revenues Revenues [Abstract] Total Revenues Segment gross profit Segment gross profit [Abstract] Segment gross margins Corporate expenses Income before interest and taxes Interest and other income Interest and other expense Provision for income taxes Assets and Liiabilities Measured at Fair Value on Recurring Basis Assets and Liiabilities Measured at Fair Value on Recurring Basis [Abstract] Fair Value Hierarchy [Domain] Note 10 - Fair Value Measurements (Details) - Assets and Liiabilities Measured at Fair Value on Recurring Basis [Table] Note 10 - Fair Value Measurements (Details) - Assets and Liiabilities Measured at Fair Value on Recurring Basis [Line Items] Derivative instruments Preferred stock, trust preferred securities, and other equity instruments Changes in Accumulated Other Comprehensive Income Changes in Accumulated Other Comprehensive Income [Abstract] Balance at Beginning of Period Other comprehensive loss before reclassifications Amounts reclassified from accumulated other comprehensive loss Net current-period other comprehensive loss Balance at End of Period Reclassifications from Accumulated Other Comprehensive Income Reclassifications from Accumulated Other Comprehensive Income [Abstract] Unrealized gains on available-for-sale securities Total before tax Tax expense Total reclassifications Note 1 - Nature of Operations and Basis of Presentation (Details) [Table] Note 1 - Nature of Operations and Basis of Presentation (Details) [Line Items] Area of Land Number of Operating Segments Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Restricted Cash and Cash Equivalents Investments, Fair Value Disclosure Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Line of Credit Facility, Maximum Borrowing Capacity (in Dollars) Line of Credit Facility, Borrowing Capacity, Description Line of Credit Facility, Borrowing Base, Percentage of Eligible Accounts Receivable Line of Credit Facility, Borrowing Base, Percentage of Eligible Direct Inventory Line of Credit Facility, Borrowing Base, Percentage of Eligible Indirect Inventory Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Ratio of EBITDA to Fixed Charges The percentage of accounts receivable used to calculate the borrowing base for the revolving line credit. The percentage of eligible direct inventory used to calculate the borrowing base for the revolving line credit. The percentage of eligible indirect inventory used to calculate the borrowing base for the revolving line credit. The ratio of EBITDA to fixed charges. Unrecognized Tax Benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Concentration Risk Benchmark [Domain] Concentration Risk Type [Domain] Note 9 - Segment Information (Details) [Table] Note 9 - Segment Information (Details) [Line Items] Number of Reportable Segments Concentration Risk, Percentage Derivative, by Nature [Axis] Fair Value, Inputs, Level 2 [Member] Debt Securities [Member] Fair Value, Inputs, Level 1 [Member] MEXICO Scenario, Unspecified [Domain] UNITED STATES Base Rate [Member] Major Types of Debt and Equity Securities [Axis] Future [Member] Operating Segments [Member] Fair Value, Inputs, Level 3 [Member] London Interbank Offered Rate (LIBOR) [Member] Concentration Risk Benchmark [Axis] Variable Rate [Axis] Commodity Option [Member] Geographic Concentration Risk [Member] Preferred Stock [Member] Corporate, Non-Segment [Member] Reportable Geographical Components [Member] Segments [Axis] Scenario [Axis] Fair Value, Hierarchy [Axis] Sales Revenue, Goods, Net [Member] Geographical [Axis] ARKANSAS Equity Securities [Member] Consolidation Items [Axis] Credit Facility [Axis] Concentration Risk Type [Axis] All Foreign Countries [Member] All Foreign Countries [Member] Biofuels [Member] Biofuels [Member] Chemicals [Member] Chemicals [Member] Leverage Ratio 1 [Member] Leverage Ratio 1 [Member] Leverage Ratio 2 [Member] Leverage Ratio 2 [Member] Leverage Ratio 3 [Member] Leverage Ratio 3 [Member] Leverage Ratio 4 [Member] Leverage Ratio 4 [Member] Other Countries [Member] Other Countries [Member] Trust Preferred Securities [Member] Trust Preferred Securities [Member] Document and Entity Information [Abstract] LineOfCreditFacilityBorrowingBasePercentageOfEligibleIndirectInventory LineOfCreditFacilityBorrowingBasePercentageOfEligibleDirectInventory ChangeInFairValueOfDerivativeInstrumentsAndMarketableSecurities RatioOfEBITDAToFixedCharges LineOfCreditFacilityBorrowingBasePercentageOfEligibleAccountsReceivable Segment Reporting Disclosure [Text Block] Cash and Cash Equivalents, Period Increase (Decrease) Payments to Acquire Marketable Securities Payments Related to Tax Withholding for Share-based Compensation Assets, Current Marketable Securities [Table Text Block] Gain (Loss) on Investments Increase (Decrease) in Accounts Receivable, Related Parties Payments to Acquire Property, Plant, and Equipment Operating Expenses Liabilities, Current Derivative Instruments and Hedging Activities Disclosure [Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Net Cash Provided by (Used in) Operating Activities Comprehensive Income (Loss), Net of Tax, Attributable to Parent Number of Operating Segments Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Restricted Cash and Cash Equivalents Entity Common Stock, Shares Outstanding Other Comprehensive Income (Loss), Available-for-sale Securities, before Reclassification Adjustments, Tax Schedule of Accrued Liabilities [Table Text Block] Income Tax Disclosure [Text Block] Assets Increase (Decrease) in Other Operating Assets Entity Well-known Seasoned Issuer Gain (Loss) on Disposition of Property Plant Equipment Increase (Decrease) in Accounts Payable, Related Parties Schedule of Long-term Debt Instruments [Table Text Block] Entity Registrant Name Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Entity Voluntary Filers Inventory, LIFO Reserve Entity Filer Category Entity Public Float Gross Profit Document Fiscal Period Focus Current Fiscal Year End Date Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Investment Income, Net Unrealized Loss on Securities Liabilities Interest Expense Legal Matters and Contingencies [Text Block] Fair Value Disclosures [Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Increase (Decrease) in Inventories Line of Credit Facility, Borrowing Capacity, Description Cash, Cash Equivalents, and Marketable Securities [Text Block] Number of Reportable Segments Amendment Flag Increase (Decrease) in Deferred Revenue Increase (Decrease) in Accounts Receivable Inventory Disclosure [Text Block] Increase (Decrease) in Other Accrued Liabilities Document Period End Date Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Increase (Decrease) in Prepaid Expense Assets, Noncurrent Revenues Schedule of Derivative Instruments [Table Text Block] Net Cash Provided by (Used in) Investing Activities Area of Land Nature of Operations [Text Block] Payments of Dividends Increase (Decrease) in Accounts Payable Investments, Fair Value Disclosure Shipping, Handling and Transportation Costs Increase (Decrease) in Income Taxes Receivable Sales Revenue, Goods, Net Unrecognized Tax Benefits Entity Central Index Key Net Cash Provided by (Used in) Financing Activities Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Inventory, Gross Comprehensive Income (Loss) Note [Text Block] Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Increase (Decrease) of Restricted Investments Earnings Per Share [Text Block] Increase (Decrease) in Other Noncurrent Liabilities Entity Current Reporting Status Nonoperating Income (Expense) Document Fiscal Year Focus Debt Disclosure [Text Block] Related Party Transactions Disclosure [Text Block] Liabilities and Equity Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Liabilities, Noncurrent Concentration Risk, Percentage Increase (Decrease) in Income Taxes Payable Amendment Description Increase (Decrease) in Accrued Interest Receivable, Net Schedule of Inventory, Current [Table Text Block] Document Type Stockholders' Equity Attributable to Parent Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of Credit Facility, Maximum Borrowing Capacity Statement [Table] Statement [Line Items]