Consolidated Balance Sheets Consolidated Balance Sheets [Abstract] Assets Assets [Abstract] Cash and cash equivalents Accounts receivable, net of allowances of $0 and $10 at June 30, 2012 and December 31, 2011, respectively Accounts receivable – related parties Inventory 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 Income taxes payable Current deferred income tax liability Deferred revenue – 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 Contingent liability – 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, 41,319,057 and 41,308,446 issued and outstanding as of June 30, 2012 and December 31, 2011, 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 Consolidated Statements of Operations and Comprehensive Income (Unaudited) Consolidated Statements of Operations and Comprehensive Income (Unaudited) [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 excluding stock-based compensation Stock-based compensation Other expense Related party expense Research and development expenses Income from operations Interest income Interest expense Loss on marketable securities Other (expense) 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 loss from unrealized losses on available-for-sale securities, net of tax of $(730) in 2012 and of $(346) in 2011 Comprehensive income Other comprehensive loss from unrealized losses on available-for-sale securities, tax Consolidated Statements of Cash Flows (Unaudited) Consolidated Statements of Cash Flows (Unaudited) [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 Provision for (benefit from) deferred income taxes This item represents the total unrealized gain (loss) included in earnings for the period as a result of holding derivative instruments and marketable securities categorized as trading, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Change in fair value of derivative instruments and marketable securities (Gain)/Loss 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 taxes 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 investing activities Cash flows from investing activities [Abstract] Restricted cash Collateralization of derivative instruments Purchase of marketable securities Proceeds from the sale of marketable securities Proceeds from the sale of fixed assets Capital expenditures Net cash used in investing activities Cash flows from financing activities Cash flows from financing activities [Abstract] Proceeds from the issuance of stock 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 interest Cash paid for income taxes The cash outflow associated with the acquisition of long-lived, physical assets in such instances where the amounts expended are managed and paid directly by other parties. Such assets are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Non-cash capital expenditures Note 1 - Nature of operations and basis of presentation Nature of Operations [Text Block] Note 2 - Inventories Inventory Disclosure [Text Block] Note 3 - Derivative instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Note 4 - Marketable securities Cash, Cash Equivalents, and Marketable Securities [Text Block] Note 5 - Accrued expenses and other current liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Note 6 - Borrowings Debt Disclosure [Text Block] Note 7 - Provision for income taxes Income Tax Disclosure [Text Block] Note 8 - Earnings per share Earnings Per Share [Text Block] Note 9 - Segment information Segment Reporting Disclosure [Text Block] Note 10 - Fair value measurements Fair Value Disclosures [Text Block] Note 11 - Legal matters Legal Matters and Contingencies [Text Block] Note 12 - Related party transactions 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] The carrying values of inventory The 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 inventories Schedule of Derivative Instruments Schedule of Derivative Instruments [Abstract] Major Types of Debt and Equity Securities [Domain] Derivative, Name [Domain] Balance Sheet Location [Domain] Fair Value, Option, Eligible Item or Group [Domain] Other current assets/liabilities - Quantity Other current assets/liabilities - Fair Value (in Dollars) Schedule of Marketable Securities Schedule of Marketable Securities [Abstract] Adjusted Cost Unrealized Gains Unrealized Losses Fair Value Schedule of Accrued Liabilities Schedule of Accrued Liabilities [Abstract] Accrued employee liabilities Accrued property, use, and franchise taxes Other Total Leverage Ratio of Interest Rate Leverage Ratio of Interest Rate [Abstract] Range [Domain] Credit Facility [Domain] Leverage Ratio Base Rate Margin LIBOR Margin Summary of Provision for Income Taxes Summary of Provision for Income Taxes [Abstract] Provision for income taxes (in Dollars) Effective tax rate Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Abstract] Net income available to common stockholders (in Dollars) Weighted average number of common shares outstanding Effect of stock options Weighted average diluted number of common shares outstanding Basic earnings per share (in Dollars per share) Diluted earnings per share (in Dollars per share) Revenue Attributable to the United States and Foreign Countries Revenue Attributable to the United States and Foreign Countries [Abstract] Segment, Geographical [Domain] Revenues Summary of Business by Segment Summary of Business by Segment [Abstract] Segment [Domain] Revenues Revenues [Abstract] Segment gross profit Segment gross profit [Abstract] Gross Profit Corporate expenses Income before interest and taxes Interest and other income Interest and other expense Provision for income taxes Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Abstract] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Level 1 Fair Value Level 1 Derivative Instruments, Gain Recognized in Income Derivative Instruments, Loss Recognized in Income Restricted Cash and Cash Equivalents Component of Other Income, Nonoperating, Name [Domain] Investments, Fair Value Disclosure Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Borrowing Capacity, Description Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of Credit Facility, Amount Outstanding Deferred Tax Assets, Valuation Allowance Unrecognized Tax Benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of Reportable Segments Business Segments [Axis] Scenario [Axis] Preferred Stock [Member] Commodity Option [Member] Balance Sheet Location [Axis] Geographical [Axis] Estimate of Fair Value, Fair Value Disclosure [Member] Unrealized Gain (Loss or Write-down) [Member] Fair Value, Hierarchy [Axis] Equity Securities [Member] Credit Facility [Axis] Fair Value, Inputs, Level 2 [Member] Derivative, by Nature [Axis] Segment, Geographical, Groups of Countries, Group One [Member] US States and Political Subdivisions Debt Securities [Member] Scenario, Unspecified [Domain] Range [Axis] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 3 [Member] Accrued Liabilities [Member] Component of Other Income, Nonoperating [Axis] Future [Member] Maximum [Member] Major Types of Debt and Equity Securities [Axis] Minimum [Member] Preferred Non-Convertible Stock [Member] Eligible Item or Group for Fair Value Option [Axis] Other Current Assets [Member] United States [Member] United States [Member] Chemicals [Member] Chemicals [Member] Leverage Ratio 1 [Member] Leverage Ratio 1 [Member] Leverage Ratio >3 Leverage Ratio 4 [Member] Leverage Ratio 4 [Member] Leverage Ratio <1 Biofuels [Member] Biofuels [Member] Leverage Ratio 3 [Member] Leverage Ratio 3 [Member] Leverage Ratio >1 <2 Leverage Ratio 2 [Member] Leverage Ratio 2 [Member] Leverage Ratio >2 <3 Document and Entity Information [Abstract] Increase (Decrease) in Other Accrued Liabilities Increase (Decrease) in Prepaid Expense Assets, Noncurrent Revenue, Net Net Cash Provided by (Used in) Investing Activities Document Period End Date Increase (Decrease) in Deferred Revenue Amendment Flag Increase (Decrease) in Income Taxes Receivable Entity Central Index Key Investments, Fair Value Disclosure Unrecognized Tax Benefits Net Cash Provided by (Used in) Financing Activities Deferred Tax Assets, Valuation Allowance Inventory, Gross Unrealized Gain on Securities Increase (Decrease) in Accounts Payable Payments of Dividends Document Fiscal Year Focus Liabilities and Equity Entity Current Reporting Status Accrued Liabilities Increase (Decrease) of Restricted Investments Selling, General and Administrative Expense Nonoperating Income (Expense) Increase (Decrease) in Accrued Interest Receivable, Net Increase (Decrease) in Income Taxes Payable Stockholders' Equity Attributable to Parent Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Amendment Description Document Type Line of Credit Facility, Maximum Borrowing Capacity Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Liabilities, Noncurrent Liabilities, Current Derivative Instruments, Gain Recognized in Income Net Cash Provided by (Used in) Operating Activities Cash and Cash Equivalents, Period Increase (Decrease) Payments to Acquire Marketable Securities Assets, Current Payments to Acquire Property, Plant, and Equipment Increase (Decrease) in Accounts Receivable, Related Parties Restricted Cash and Cash Equivalents Entity Common Stock, Shares Outstanding Derivative Instruments, Loss Recognized in Income Entity Filer Category Entity Public Float Entity Voluntary Filers Inventory, LIFO Reserve Assets Entity Registrant Name Increase (Decrease) in Other Operating Assets Increase (Decrease) in Accounts Payable, Related Parties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Line of Credit Facility, Amount Outstanding Entity Well-known Seasoned Issuer Increase (Decrease) in Inventories Number of Reportable Segments Increase (Decrease) in Accrued Liabilities Line of Credit Facility, Borrowing Capacity, Description Interest Paid Gross Profit Increase (Decrease) in Restricted Cash Income Taxes Paid Unrealized Loss on Securities Liabilities Current Fiscal Year End Date Document Fiscal Period Focus Interest Expense Statement [Table] Statement [Line Items]