Accounting Changes And Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Accounting Changes [Text Block] Change in Accounting Estimate Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable Current Accounts payable Total gross receivable due from customer, clients, other third parties or from transactions not separately disclosed, within one year of the balance sheet date (or the normal operating cycle, whichever is longer). Accounts Receivable Current Accounts receivable, gross Accounts Receivable Gross Current Trade receivables Accounts Receivable Net Current Accounts receivable, net Accounts receivable, net Accounts Receivable Net [Line Items] Accounts Receivable Net [Line Items] Accounts Receivable Net [Line Items] Accrued environmental liabilities as of the balance sheet date which are included in accrued and other liabilities. Accrued Environmental Liabilities Accrued liabilities for environmental matters Accrued general liability insurance claims as of the balance sheet date which are included in accrued and other liabilities. Accrued General Liability Insurance Claims Accrued general liability insurance claims Acquisition of working interest in natural gas properties. Acquisition Of Working Interests In Natural Gas Properties Acquisition of working interests in natural gas properties Additional Paid In Capital Capital in excess of par value Additional Paid In Capital [Member] Capital in Excess of Par Value [Member] Adjusted Earnings Before Interest Taxes Depreciation And Amortization And Other Non Cash Items [Abstract] Adjusted Earnings Before Interest Taxes Depreciation And Amortization And Other Non Cash Items [Abstract] Adjusted Earnings Before Interest Taxes Depreciation And Amortization And Other Non Cash Items [Abstract] Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Stock-based compensation Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation Excess income tax benefit associated with stock-based compensation Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by continuing operating activities: The aggregated amount of an insurance claim settlement. Aggregate Insurance Claim Settlement Amount Total insurance settlement recovery The number of alleged violations resolved through a global settlement. Alleged Violation Resolved Via Global Settlement Number of alleged violation resolved through a global settlement The number of alleged violations resolved through payment of a civil penalty. Alleged Violations Resolved Via Civil Penalty Payment Number of alleged violations resolved through civil penalty payment All Other Segments [Member] Other [Member] Allowance For Doubtful Accounts Receivable Current Allowance for doubtful accounts Allowance For Doubtful Accounts Receivable Period Increase Decrease Provisions for (recoveries of) losses on accounts receivable Amended ammonium nitrate supply agreement. Amended Ammonium Nitrate Supply Agreement [Member] Amended Ammonium Nitrate Supply Agreement [Member] Amended bayer agreement. Amended Bayer Agreement [Member] Amended Bayer Agreement [Member] The amended maximum borrowing capacity of the revolving credit facility. Amended Maximum Borrowing Capacity Amended maximum amount of revolving credit facility Amended working capital revolver. Amended Working Capital Revolver [Member] Amended Working Capital Revolver [Member] The date of an amendment. Amendment Date Amendment date Amendment Flag Amendment Flag Ammonia plant. Ammonia Plant [Member] Ammonia Plant [Member] Amount approved by an insurance company in settlement or partial settlement of a claim for reimbursement when the Company has suffered a loss covered under an insurance policy. Amount Approved Under Insurance Claim Approved insurance payments Insurance payments received Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Antidilutive securities excluded from computation of diluted earning per share Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Name [Domain] Antidilutive Securities, Name [Domain] The period of time from which an insurance claim for reimbursement is approved by an insurance company and the amount is payable. Approved Insurance Payment Due Period Approved insurance payment terms Asset Retirement Obligation Disclosure [Abstract] Asset Retirement Obligation Disclosure [Abstract] Asset Retirement Obligation Disclosure [Text Block] Asset Retirement Obligations Asset Retirement Obligations Noncurrent Accrued liability for AROs Assets Total assets Total assets Assets [Abstract] Assets Assets Current Total current assets Assets Current [Abstract] Current assets: Assets Fair Value Disclosure Total Assets Fair Value Disclosure [Abstract] Assets - Supplies, prepaid items and other: Basic And Dilutive Earnings Per Share [Member] Basic And Dilutive Earnings Per Share [Member] Basic And Dilutive Earnings Per Share [Member] The year in which a person serving on the Board of Directors elected by shareholders term expires. Board Of Director Term Expiration Year Directors term expiration date A block of text that may be used to disclose all or part of the information relating to business interruption and property insurance claims. This may include the nature of the event resulting in the insurance claim, the aggregate amount of insurance recoveries recognized during the period, and the line item(s) in the statement of operations in which those insurance recoveries are classified. Business Interruption And Property Insurance Claims [Text Block] Property and Business Interruption Insurance Claims and Recoveries Business interruption insurance. Business Interruption Insurance [Member] Business Interruption Insurance [Member] Capital Expenditures Incurred But Not Yet Paid Other assets, accounts payable and long-term debt associated with additions of property, plant and equipment Fair value as of the balance sheet date of carbon credit assets, which do not meet the criteria of a derivative instrument. Carbon Credit Assets Fair Value Disclosure Carbon credits The number of carbon credit units held by the entity subject to contractual obligations. Carbon Credit Contractual Obligation Number Of Instruments Held Number of carbon credits The fair value per carbon credit unit as of the balance sheet date. Carbon Credit Fair Value Per Unit Carbon credit fair value per unit Fair value as of the balance sheet date of carbon credit liabilities, which do not meet the criteria of a derivative instrument. Carbon Credit Liabilities Fair Value Disclosure Contractual obligations - carbon credits Carbon credits. Carbon Credits [Member] Carbon credits [Member] Cash And Cash Equivalents At Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Cash And Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash And Cash Equivalents Period Increase Decrease Net increase (decrease) in cash and cash equivalents Cash And Cash Equivalents Policy [Text Block] Cash and Cash Equivalents Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy Noncurrent Restricted Cash The amount of cash and cash equivalents that are in excess of the FDIC-insured limit Cash Cash Equivalents In Excess Of Fdic Insured Limits Balance in excess of FDIC-insured limits Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Noncash investing and financing activities: Cash Provided By Used In Operating Activities Discontinued Operations Operating cash flows Certificate Of Deposit Original Maturity Period Certificate Of Deposit Original Maturity Period Original maturity period Certificates Of Deposit [Member] CD [Member] Change In Accounting Estimate By Type [Axis] Change in Accounting Estimate by Type [Axis] Change In Accounting Estimate Description Business interruption recovery estimate Change In Accounting Estimate Financial Effect Impact of change in business interruption recovery accounting estimate Change In Accounting Estimate [Line Items] Change in Accounting Estimate [Line Items] Change In Accounting Estimate[Member] Change In Accounting Estimate [Member] Change In Accounting Estimate[Member] Change In Accounting Estimate Type [Domain] Change in Accounting Estimate, Type [Domain] The purchase price expressed as a percentage of the principal amount of debt. Change Of Control Purchase Price Change in control purchase price Changes In the Inventory Reserves. Changes In Inventory Reserves Table [Text Block] Changes in Inventory Reserves Chemical business. Chemical Business [Member] Chemical Business [Member] Goodwill of Chemical. Chemical [Member] Chemical [Member] Chemical products. Chemical Products [Member] Chemical Products [Member] Cherokee Corporate Pk. Cherokee Corporate Pk [Member] Cherokee Facility [Member] Civil penalty amount to be paid to environmental protection agency. Civil Penalty Amount To Be Paid To Environmental Protection Agency Amount of civil penalty to be paid Civil penalty settlement amount to be paid to department of environmental quality. Civil Penalty Settlement Amount To Be Paid To Department Of Environmental Quality Amount of civil penalty Class Of Stock [Domain] Class of Stock [Domain] Climate control business. Climate Control Business [Member] Climate Control Business [Member] Goodwill of Climate Control. Climate Control [Member] Climate Control [Member] Climate control products. Climate Control Products [Member] Climate Control Products [Member] Commercial and industrial product base warranty coverage for manufactured product period. Commercial And Industrial Product Base Warranty Coverage For Manufactured Product Commercial and industrial product base warranty coverage for manufactured equipment Commercial and industrial product base warranty coverage for spare parts. Commercial And Industrial Product Base Warranty Coverage For Spare Parts Commercial and industrial product base warranty coverage for spare parts Commitments And Contingencies Commitments and contingencies (Note 10) Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments And Contingencies Disclosure [Text Block] Commitments and Contingencies Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commodity Contract [Member] Commodities contracts [Member] Common Stock [Member] Common Stock Shares [Member] Common Stock Par Or Stated Value Per Share Common stock, par value Common Stock Shares Authorized Common stock, shares authorized Common Stock Shares Issued Common stock, shares issued Common Stock Value Common stock, $.10 par value; 75,000,000 shares authorized, 26,831,055 shares issued (26,731,360 at December 31, 2012) Consolidation Policy [Text Block] Basis of Consolidation and Presentation Construction In Progress Gross Project costs capitalized Contract maturity date. Contract Maturity Date Operating agreement maturity date Initial term of this agreement is for one year, with renewal options, but either party has an option to terminate the agreement pursuant to the terms of the agreement. Contracts Period Contract period The terms relating to contract. Contract Terms Contract terms Contractual obligations relating to carbon credits. Contractual Obligations Relating To Carbon Credits [Member] Contractual obligations relating to carbon credits [Member] Contractual weighted average pay rate related to the entity's interest rate contracts as of the balance sheet date. Contractual Weighted Average Pay Rate Contractual weighted-average pay rate Corporate assets and other. Corporate Assets And Other [Member] Corporate assets and other [Member] Cost Of Revenue Cost of sales Cost Of Sales [Member] Cost of sales [Member] Covenants. Covenants [Member] Covenants [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Current Federal Tax Expense Benefit Federal Current Fiscal Year End Date Current Fiscal Year End Date Current Income Tax Expense Benefit Total Current Current Income Tax Expense Benefit Continuing Operations [Abstract] Current: Current State And Local Tax Expense Benefit State Customer deposits current and noncurrent. Customer Deposits Current And Noncurrent Customer deposits The daily penalty amount for default. Daily Penalty Amount For Default Daily penalty amount for default Debt And Capital Lease Obligations Long-term debt Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument Collateral Amount Carrying value of the assets Debt Instrument Covenant Description Amended working capital revolver loan requirements Debt Instrument Date Of First Required Payment 1 Debt instrument, start date of interest payment Debt Instrument Description Of Variable Rate Basis Secured Promissory Notes, interest rate description Debt Instrument Face Amount Aggregate principal amount of notes sold Debt Instrument Interest Rate At Period End Secured Promissory Note, interest rate Debt Instrument Interest Rate Stated Percentage Debt instrument, interest rate Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument Maturity Date Maturity date Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Debt Instrument Offering Date 1 Offering date Debt Instrument Periodic Payment Terms Balloon Payment To Be Paid Final balloon payment Debt Instrument Redemption Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument Redemption Period [Domain] Debt Instrument, Redemption, Period [Domain] Debt Instrument Redemption Period One [Member] 2016 [Member] Debt Instrument Redemption Period Three [Member] 2018 and Thereafter [Member] Debt Instrument Redemption Period Two [Member] 2017 [Member] Debt Instrument Redemption Price Percentage Redemption price Debt Instrument [Table] Schedule of Long-term Debt Instruments [Table] Debt Issuance Costs Incurred During Noncash Or Partial Noncash Transaction Debt issuance costs incurred associated with senior secured notes Debt Policy [Text Block] Debt Issuance Costs Deductible for property damage. Deductible For Property Damage Deductible property damage under insurance The duration for increased interest rate for a default event. Default Duration For Interest Rate Increase Default duration for increased interest rate The increase in the interest rate for a default event. Default Interest Rate Increase Interest rate increase for default Default Longterm Debt Description Of Violation Or Event Of Default Events of default description Default [Member] Default [Member] Default [Member] Deferred Federal Income Tax Expense Benefit Federal Amount of gain contingency relating to an insurance recovery that was deferred as of the balance sheet date. Deferred Gain On Insurance Recovery Deferred gain on insurance recoveries Deferred gain on insurance recovery Deferred Income Tax Expense Benefit Deferred income taxes Total Deferred Deferred Income Tax Expense Benefit Continuing Operations [Abstract] Deferred: Current and noncurrent carrying amount as of the balance sheet date of deferred revenue on extended warranty contracts. Deferred Revenue On Extended Warranty Contracts Current And Noncurrent Deferred revenue on extended warranty contracts Deferred State And Local Income Tax Expense Benefit State Deferred Tax Assets Net Current Deferred income taxes Deferred Tax Liabilities Noncurrent Deferred income taxes Depreciation Depreciation, depletion and amortization of property, plant and equipment Derivative Assets Derivative Assets Derivative Contract Type [Domain] Derivative Contract [Domain] Derivative Fixed Interest Rate LIBOR rate Derivative future or forward contract in pounds. Derivative Future Or Forward Contract In Pounds Derivative future or forward contracts in pounds Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Instruments And Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments And Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments And Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments And Hedging Activities Disclosure [Text Block] Derivatives, Hedges, Financial Instruments and Carbon Credits The amount of net gains and losses (realized and unrealized) recognized in earnings during the period on derivative instruments and carbon credit assets or carbon credit contractual obligations measured at fair value. Derivative Instruments Carbon Credits Gain Loss Recognized In Earnings Derivative instruments and carbon credits, gains and losses recognized in earnings Derivative instruments and carbon credits change in unrealized gains and losses relating to contracts still held at period end. Derivative Instruments Change In Unrealized Gains Losses Relating To Contracts Still Held At Period End Derivative instruments and carbon credits, change in unrealized gains and losses recognized in earnings Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments Gain Loss [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative Liabilities Derivative Financial Instruments, Liabilities Derivative Notional Amount Interest rate swap declining balance, beginning balance Disclosure Accrued Product Warranty Costs [Abstract] Disclosure Accrued Product Warranty Costs [Abstract] Disclosure Accrued Product Warranty Costs [Abstract] Expenses charged against earnings during the period relating to dismantle and demolition activities. Dismantle And Demolition Expense Dismantle and demolition expense The maximum annual amount of distributions or dividends to the parent under an agreement. Distribution Dividend Limit Limit of distributions/dividends Dividends Preferred Stock Cash Dividends on preferred stock paid or declared Dividends on preferred stocks Dividends paid on preferred stocks Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share [Abstract] Income (loss) per common share: Earnings Per Share Basic Basic net income per common share Net income Earnings Per Share Basic [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share Diluted Diluted net income per common share Net income Numerator. Earnings Per Share Numerator [Abstract] Numerator: Earnings Per Share [Text Block] Income Per Common Share Effective Income Tax Rate Continuing Operations Percentage of pre-tax income Eldorado. Eldorado [Member] El Dorado Facility [Member] Employee Related Liabilities Current And Noncurrent Accrued payroll and benefits Employee Stock Option [Member] Stock Options [Member] Entity Central Index Key Entity Central Index Key Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Equity Component [Domain] Equity Component [Domain] Equity Method Investment Ownership Percentage Ownership interest in equity method investment Estimated fees related to a construction agreement. Estimate Construction Agreement Fees Constructor's fees Estimated cost of project. Estimated Cost Of Project Estimated cost for project ranges