Agreement Type [Axis]
Information by type of agreement.
Agreement Type [Domain]
Categorization of agreement by agreement type.
Asset Retirement Obligation Assets Not Fully Depreciated
Represents the assets associated with the entity's asset retirement obligations, which are not fully depreciated.
Amount of assets associated with AROs not fully depreciated
Asset Retirement Obligation Estimated Future Annual Expenditures
Estimated annual expenditures in years 2014 through 2018 relating to AROs
Represents the future estimated annual expenditures related to asset retirement obligations.
Automotive Equipment
Automotive equipment
Carrying amount as of the balance sheet date of the automotive equipment.
Banking Facilities and Debt
Buildings and Building and Leasehold Improvements
Buildings and building and leasehold improvements
Carrying amount as of the balance sheet date of buildings and building and leasehold improvements.
Concentration of Credit Risk and Trade Receivables [Abstract]
Concentration of Credit Risk and Trade Receivables
Concentration Risk, Credit Risk and Trade Receivables [Policy Text Block]
Concentration of Credit Risk and Trade Receivables
Disclosure of accounting policy for credit risk and trade receivables.
Cost of Goods and Services Sold, Net, Percentage
Total cost of revenues (as a percent)
The percentage of total cost of revenue to total net revenue from the sale of goods as of year end.
Amendment Description
Costs Incurred
Costs Incurred, Oil and Gas Properties [Abstract]
Amendment Flag
Current Income Taxes [Abstract]
Current income taxes:
Current Income Taxes Accrued Expenses
Accrued expense
Represents the current income taxes classified in accrued expenses.
Current Income Taxes Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets
Represents the current income taxes classified in prepaid expenses and other current assets.
Debt Instrument, Amendment Fee
Amendment fee
Represents the fee paid related to the amendment of the credit agreement.
Debt Instrument, Cash Flow Leverage Ratio
Represents the cash flow leverage ratio required under the terms of the credit agreement.
Cash flow leverage ratio
Pro forma Cash Flow Leverage Ratio to be maintained to purchase, redeem or otherwise acquire shares of common stock
Represents the pro forma cash flow leverage ratio required to be maintained by the entity to purchase, redeem or otherwise acquire shares of its common stock.
Debt Instrument, Covenant Proforma Cash Flow Leverage Ratio for Purchase Redeem or Acquire Shares of Common Stock
Deferred Income Taxes Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets
Represents the deferred income taxes classified in prepaid expenses and other current assets.
Deferred Tax Liabilities, Lime and Limestone Property, Plant and Equipment
Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment related to lime and limestone operations.
Lime and limestone property, plant and equipment
Deferred Tax Liabilities, Natural Gas Interests Drilling Costs and Equipment
Natural gas interests drilling costs and equipment
Amount of deferred tax liability attributable to taxable temporary differences from drilling costs and equipment related to the entity's natural gas interests.
Accumulated Benefit Obligation
Defined Benefit Plan, Accumulated Benefit Obligation [Abstract]
Number of major components of plan assets
Defined Benefit Plan, Assets Number of Major Components
Represents the number of major components of the portfolio of plan assets.
Area of land (in acres)
Area of Land
Expected long-term return on plan assets (as a percent)
Represents the expected long-term return on assets used to calculate benefit obligation.
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation Expected Long Term Return on Assets
Defined Benefit Plan Fair Value of Plan Assets [Abstract]
Pension plan assets at the fair value
Depreciation, depletion and amortization (as a percent)
The percentage of revenue from depreciation, depletion and amortization to total net revenue from the sale of goods as of year end.
Depreciation Depletion and Amortization, Net, Percentage
Derivative Reference Rate
Represents the reference rate for the variable rate of the interest rate derivative.
LIBOR (as a percent)
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves Future Cash Inflows, Net
Future estimated net revenues
Cash proceeds expected from future sale of oil and gas from proved reserves, net of future costs of producing and developing oil and gas from proved reserves.
Current Fiscal Year End Date
Award Type [Axis]
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves Future Production and Development Costs
Future estimated production and development costs
Represents the future cost of producing and developing oil and gas from proved reserves located in a specified geographic region.
Document and Entity Information
Draw Term Loan [Member]
Represents the information pertaining to multiple draw term loan which is provided under the credit agreement.
Draw Term Loan
Drillsite Agreement [Member]
Drillsite Agreement
Represents the information related to drillsite and production facility lease agreement and subsurface easement.
Effective Income Tax Rate Reconciliation Increase (Decrease) in Income Tax Expense [Abstract]
(Reduction) increase in taxes resulting from (as a percent):
Gross Profit Lime and Limestone Operations
Gross profit, Lime and limestone operations
Represents the gross profit relating to the entity's lime and limestone operations.
Gross Profit Natural Gas Interests
Gross profit, Natural gas interests
Represents the gross profit relating to the entity's natural gas interests.
Gross Profit, Net, Percentage
Gross profit (as a percent)
The percentage of gross profit to total net revenue from the sale of goods as of year end.
Income (Loss) from Continuing Operations before Income Taxes, Minority Interest and Income (Loss) from Equity Method Investments, Net, Percentage
Income before income taxes (as a percent)
The percentage of income before income taxes to total net revenue from the sale of goods as of year end.
Income Tax Expense (Benefit) Continuing Operations and Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Reconciliation of income taxes computed at the federal statutory rate to income tax expense
Income Tax Expense (Benefit), Net, Percentage
Income tax expense (as a percent)
The percentage of income tax expense benefit to total net revenue from the sale of goods as of year end.
Document Period End Date
This element represents Net Income (Loss) Available to Common Stockholders, Basic, Net, Percentage.
Net Income (Loss) Available to Common Stockholders, Basic, Net, Percentage
Net income (as a percent)
Income Tax Reconciliation, Increase (Decrease) in Income Tax Expense [Abstract]
(Reduction) increase in taxes resulting from:
Interest Expense, Net, Percentage
Interest expense (as a percent)
The percentage of interest expense to total net revenue from the sale of goods as of year end.
Carrying amount, net of valuation reserves and allowances, as of the balance sheet date of raw materials and finished goods.
Inventory Raw Materials and Finished Goods, Net of Reserves
Total
Labor and Other Operating Expenses
Labor and other operating expenses
This element represents labor and other operating expenses during the reporting period.
Labor and Other Operating Expenses [Abstract]
Labor and other operating expenses
Labor and Other Operating Expenses, Net, Percentage
Labor and other operating expenses (as a percent)
The percentage of labor and other operating expenses to total net revenue from the sale of goods as of year end.
Employee and Nonemployee Stock Option [Member]
An arrangement whereby an employee or non-employee director is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Although there are variations, normally, after vesting, when an option is exercised, the holder pays the strike value in cash to the issuing entity and receives equity shares. The equity shares can be sold into the market for cash at the current market price without restriction.
Options
Stock options
Lime and Limestone Operations, Net, Percentage
Lime and limestone operations (as a percent)
The percentage of revenue from Lime and Limestone operations to total net revenue from the sale of goods as of year end.
Entity [Domain]
Long Term, Debt Maturities, Final Principal Payment
Represents the final principal payment required to settle a long-term debt obligation.
Final principal payment
The percentage of revenue from Natural Gas Interests to total net revenue from the sale of goods as of year end.
Natural Gas Interests, Net, Percentage
Natural gas interests (as a percent)
Total other expense (income) (as a percent)
The percentage of non-operating income expense to total net revenue from the sale of goods as of year end.
Nonoperating Income (Expense), Net, Percentage
Number of Wells Drilled
Number of wells
Represents the number of wells drilled.
Oil and Gas Properties, Area of Land
Area of land (in acres)
Represents the area of land owned by the entity in which wells are drilled.
Represents the area of land under a lease in which wells are drilled.
Oil and Gas Properties, Area of Land under Lease
Area of land under a lease (in acres)
Operating Leases Term High End of Range
Operating leases term, high end of range
Represents the high end of the range of the terms of operating leases.
Operating leases term, low end of range
Represents the low end of the range of the terms of operating leases.
Operating Leases Term Low End of Range
Operating Profit, Net, Percentage
Operating profit (as a percent)
The percentage of operating profit to total net revenue from the sale of goods as of year end.
Organization
Organization [Line Items]
Organization
Organization [Table]
The table contains disclosure pertaining to an organization.
Other Assets [Policy Text Block]
Other Assets
Disclosure of accounting policy of assets not separately disclosed in the balance sheet.
Lime and Limestone Operations Segment [Member]
Lime and limestone operations
Represents information pertaining to the lime and limestone operations, a business segment of the entity.
Natural Gas Interests Segment [Member]
Natural gas interests
Represents information pertaining to the natural gas interests, a business segment of the entity.
Other Nonoperating Income (Expense), Net, Percentage
Other, net (as a percent)
The percentage of other non-operating income expense to total net revenue from the sale of goods as of year end.
Percentage of Non Operating Working Interest
Percentage of non-operating working interest
Represents the percentage of non-operating working interest.
Percentage of Overall Average Revenue Interest
Overall average revenue interest (as a percent)
Represents the percentage of overall average revenue interest.
Percentage of Royalty Interest
Percentage of royalty interest
Represents the percentage of royalty interest.
Principles of Consolidation and Reclassifications [Abstract]
Principles of Consolidation and Reclassifications
Prior Period Reclassification Adjustment Amount
Reclassification of amount from deferred income taxes to prepaid expenses and other current assets
Represents the amount of a reclassification adjustment made to prior period financial statement amounts.
Prior to Amendment [Member]
Prior to the Amendment
Information pertaining to the credit facilities' terms before the facility was amended.
Proved reserves utilizing year-end prices
Proved Reserves Volume Utilizing Year End Prices
Net quantities of the enterprise's interests in proved developed reserves utilizing the year-end prices.
Revenue, Net, Percentage
Total revenues (as a percent)
The percentage of total revenue to total net revenue from the sale of goods as of year end.
Schedule of Fair Value of Plan Assets Table [Text Block]
Schedule of fair values of the Corson Plan assets
Tabular disclosure of the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall.
Selling, General and Administrative Expenses, Net, Percentage
Selling, general and administrative expenses (as a percent)
Selling, General and Administrative Expenses, Net, Percentage.
Seventy Five Percent of Outstanding Balance of Draw Term Loan [Member]
Represents the information pertaining to 75 percent of the outstanding balance of the draw term loan.
75% of the outstanding balance of the Draw Term Loan
Share Based Compensation Arrangement by Share Based Payment Award, Options, Aggregate Intrinsic Value [Abstract]
Aggregate Intrinsic Value
Share Based Compensation Arrangements by Share Based Payment Award, Options, Expiration Term
Expiration period
The period of time, from the grant date until the time at which the share-based (option) award expires.
Significant Accounting Policies [Line Items]
Significant accounting policies
Significant Accounting Policies [Table]
Tabular disclosure pertaining to the entity's significant accounting policies.
Statement of Cash Flow [Policy Text Block]
Statements of Cash Flows
Disclosure of the entity's accounting policy related to statements of cash flows.
Term Loan [Member]
Represents the information pertaining to term loan which is provided under the credit agreement.
Term Loan
Twenty Five Percent of Outstanding Balance of Draw Term Loan [Member]
Represents the information pertaining to 25 percent of the outstanding balance of the draw term loan.
25% of the outstanding balance of the Draw Term Loan
Property, Plant and Equipment Lives [Text Block]
Schedule of estimated useful lives of property, plant and equipment
Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.
Reclassification to interest expense
Other Comprehensive Income (Loss) Reclassification to Interest Expense Before, Tax
Amount before tax of reclassification adjustment on other comprehensive income (loss) in interest expense.
Share Based Compensation Arrangement by Share Based Payment Award, Options, Grants in Period Total Intrinsic Value
Granted
Represents the grant-date intrinsic value of options granted during the reporting period.
Income Tax Reconciliation Executive Salary Limits
Executive salary limits
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to executives salary limits.
Effective Income Tax Rate Reconciliation Executive Salary Limits
Executive salary limits (as a percent)
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to executives salary limits.
Amount of required minimum rental payments maturing after the fourth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.
Operating Leases Future Minimum Payments Due After Year Four
Thereafter
3 month LIBOR
Represents three months interest rate at which a bank borrows funds from other banks in the London interbank market.
Three Months London Interbank Offered Rate (LIBOR) [Member]
Dividends [Text Block]
Dividend
The entire disclosure related to dividends declared, including paid and unpaid dividends.
Entity Well-known Seasoned Issuer
Entity Voluntary Filers
Entity Current Reporting Status
Entity Filer Category
Entity Public Float
Entity Registrant Name
Entity Central Index Key
Entity Common Stock, Shares Outstanding
Document Fiscal Year Focus
Document Fiscal Period Focus
Legal Entity [Axis]
Document Type
Accounting Policies
Trade receivables, net
Accounts Receivable, Net, Current
Accounts payable
Accounts Payable, Current
Accretion of discount
Accretion of Discount
Accrued expenses
Accrued Liabilities, Current
Less accumulated depreciation and depletion
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Minimum pension liability adjustments, net of tax benefit
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax
Mark to market of interest rate hedges, net of tax benefit
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax
Accumulated other comprehensive loss
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Additional paid-in capital
Additional Paid in Capital, Common Stock
Additional Paid-In Capital
Additional Paid-in Capital [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Stock-based compensation expense
Allocated Share-based Compensation Expense
Beginning balance
Ending balance
Allowance for Doubtful Accounts Receivable, Current
Additions and write-offs to the company's allowance for doubtful accounts
Allowance for Doubtful Accounts Receivable [Roll Forward]
Schedule of additions and write-offs to the Company's allowance for doubtful accounts
Allowance for Credit Losses on Financing Receivables [Table Text Block]
Write-offs
Allowance for Doubtful Accounts Receivable, Write-offs
Amortization of deferred financing costs
Amortization of Financing Costs
Amortization expense
Amortization of Intangible Assets
Antidilutive Securities [Axis]
Anti-dilutive securities
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Name [Domain]
Anti-dilutive shares of common stock excluded from the calculation of dilutive securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Accretion expense recognized on AROs
Asset Retirement Obligation, Accretion Expense
Asset Retirement Obligations
Asset Retirement Obligations, Policy [Policy Text Block]
Asset Retirement Obligations
Asset Retirement Obligation Disclosure [Abstract]
ARO included in other liabilities and accrued expenses
Asset Retirement Obligation
Amount spent on AROs
Asset Retirement Obligation, Liabilities Settled
Total assets
Identifiable assets, at year end
Assets
Current assets:
Assets, Current [Abstract]
ASSETS
Assets [Abstract]
Total current assets
Assets, Current
Price (in dollars per Mcf or Bbl)
Average Sales Prices
Basis of Presentation
Basis of Accounting [Text Block]
Buildings and building improvements
Building and Building Improvements [Member]
Capitalized Costs
Capitalized Costs, Oil and Gas Producing Activities, Net [Abstract]
Cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Cash and Cash Equivalents, at Carrying Value
Cash and cash equivalents
Cash and Cash Equivalents [Member]
Commitments and Contingencies
Commitments and contingencies
Commitments and Contingencies.
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common Stock
Common Stock [Member]
Common stock
Common Stock, Value, Issued
Common stock, shares issued
Common Stock, Shares, Issued
Quarterly cash dividend (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Cash dividend (in dollars per share)
Common stock, authorized shares
Common Stock, Shares Authorized
Cash dividend per share of common stock (in dollars per share)
Common Stock, Dividends, Per Share, Cash Paid
Employee Retirement Plans
Employee Retirement Plans
Deferred tax assets
Components of Deferred Tax Assets [Abstract]
Summary of deferred tax liabilities and assets
Components of Deferred Tax Assets and Liabilities [Abstract]
Components of Deferred Tax Liabilities [Abstract]
Deferred tax liabilities
Components of comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income, Policy [Policy Text Block]
Comprehensive Income
Comprehensive Income (Loss)
Comprehensive income
Comprehensive (loss) income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Accumulated Other Comprehensive Loss
Comprehensive Income (Loss) Note [Text Block]
Principles of Consolidation
Consolidation, Policy [Policy Text Block]
Construction in progress
Construction in Progress, Gross
Unallocated corporate assets and cash items
Corporate, Non-Segment [Member]
Total cost of revenues
Cost of Goods and Services Sold
Depreciation, depletion and amortization
Cost of Goods Sold, Depreciation, Depletion and Amortization
Cost of revenues:
Cost of Goods and Services Sold [Abstract]
Cost of revenues
Cost of Sales [Member]
Lime and limestone operations
Costs of Metals Sold
Capitalized asset retirement costs
Costs Incurred, Asset Retirement Obligation Incurred
Development costs incurred
Costs Incurred, Development Costs
Exploration costs
Costs Incurred, Exploration Costs
Property acquisition costs
Costs Incurred, Acquisition of Oil and Gas Properties
Current income tax expense
Current Income Tax Expense (Benefit)
Interest rate basis
Debt Instrument, Description of Variable Rate Basis
Variable rate basis
Banking facilities and other debt
Debt Instrument [Line Items]
Schedule of Long-term Debt Instruments [Table]
Face amount of term loan
Debt Instrument, Face Amount
Interest rate margin (as a percent)
Debt Instrument, Basis Spread on Variable Rate
Banking Facilities and Debt
Debt Disclosure [Text Block]
Term
Debt Instrument, Term
Quarterly principal payments
Debt Instrument, Periodic Payment, Principal
Current interest rate (as a percent)
Debt Instrument, Interest Rate at Period End
Total
Deferred Tax Liabilities, Gross, Noncurrent
Deferred income taxes:
Deferred Income Taxes and Other Assets [Abstract]
Deferred financing costs
Deferred Finance Costs, Noncurrent, Net
Deferred income taxes
Deferred Income Taxes and Tax Credits
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Deferred income tax expense
Fair value liability of interest rate hedges
Deferred Tax Assets, Derivative Instruments
Other
Deferred Tax Assets, Other
Total
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent
Alternative minimum tax credit carry forwards
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax
Minimum pension liability
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions
Other
Deferred Tax Liabilities, Other
Deferred tax liabilities, net
Deferred tax liabilities, net
Net deferred tax liabilities
Deferred tax liabilities, net
Deferred Tax Liabilities, Net, Noncurrent
Net deferred tax liabilities
Deferred Tax Liabilities, Net
Expected contribution by the entity in 2013
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year
2016
Defined Benefit Plan, Expected Future Benefit Payments, Year Three
Projected benefit obligation at beginning of year
Projected benefit obligation at end of year
Defined Benefit Plan, Benefit Obligation
Accrued benefit cost
Defined Benefit Plan, Amounts Recognized in Balance Sheet
Change in projected benefit obligation:
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Target allocations, minimum (as a percent)
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum
Actuarial (gain) loss on plan assets
Defined Benefit Plan, Actuarial Gain (Loss)
2015
Defined Benefit Plan, Expected Future Benefit Payments, Year Two
Discount rate (as a percent)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate
2018
Defined Benefit Plan, Expected Future Benefit Payments, Year Five
Amortization of net actuarial loss
Defined Benefit Plan, Amortization of Gains (Losses)
Target allocations, maximum (as a percent)
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum
Net liability recognized on the consolidated balance sheets
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
2017
Defined Benefit Plan, Expected Future Benefit Payments, Year Four
Current target allocations
Defined Benefit Plan, Assets, Target Allocations [Abstract]
2014
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months
Employee retirement plans
Defined Benefit Plan Disclosure [Line Items]
Actual gain on plan assets
Defined Benefit Plan, Actual Return on Plan Assets
Benefits paid
Defined Benefit Plan, Benefits Paid
Accumulated benefit obligation
Defined Benefit Plan, Accumulated Benefit Obligation
Target allocations (as a percent)
Defined Benefit Plan, Target Plan Asset Allocations
2019-2023
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter
Change in plan assets:
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Expected benefit payments
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Funded status
Defined Benefit Plan, Funded Status of Plan [Abstract]
Unfunded projected benefit obligation
Underfunded status
Defined Benefit Plan, Funded Status of Plan
Interest cost
Defined Benefit Plan, Interest Cost
Fair value of plan assets at beginning of year
Fair value of plan assets at end of year
Fair value of assets
Defined Benefit Plan, Fair Value of Plan Assets
Contributions by the entity
Employer contribution
Defined Benefit Plan, Contributions by Employer
Net periodic benefit cost
Defined Benefit Plan, Net Periodic Benefit Cost
Components of the net periodic benefit cost
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Expected return on plan assets
Defined Benefit Plan, Expected Return on Plan Assets
Company contributions
Defined Contribution Plan, Cost Recognized
Weighted-average assumptions used in the measurement of benefit obligation
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Asset Categories [Axis]
Defined Benefit Plan and Other Postretirement Benefit Plan [Domain]
Contributory retirement (401(k)) savings plans
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Depreciation and amortization expense
Depreciation, Depletion and Amortization, Nonproduction
Depreciation, depletion and amortization
Depreciation, Depletion and Amortization
Interest rate swap liabilities included in other liabilities
Derivative Liability, Noncurrent
Derivative Instrument [Axis]
Interest rate swap liabilities included in accrued expenses
Derivative Liability, Current
Derivative Contract [Domain]
Derivative Instruments and Hedging Activities
Derivatives, Policy [Policy Text Block]
Stock-Based Compensation
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Stock-Based Compensation
10% annual discount for estimated timing of cash flows
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, 10 Percent Annual Discount for Estimated Timing of Cash Flows
Future estimated net cash flows
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Net Cash Flows
Future estimated gross revenues
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Cash Inflows
Unaudited standardized measure of discounted future net cash flows
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Net Cash Flows [Abstract]
Future estimated income tax expense
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Income Tax Expense
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Standardized Measure
Standardized measure of discounted future estimated net cash flows
Dividends payable date to be paid
Dividends Payable, Date to be Paid
Dividend
Total estimated amount of dividend
Dividends Payable
Dividends payable date of record
Dividends Payable, Date of Record
Dividends payable date declared
Dividends Payable, Date Declared
Federal
Domestic Tax Authority [Member]
Income per share of common stock:
Earnings Per Share, Basic and Diluted [Abstract]
Income Per Share of Common Stock
Earnings Per Share [Text Block]
Income Per Share of Common Stock
Earnings Per Share, Policy [Policy Text Block]
Basic (in dollars per share)
Basic net income per common share (in dollars per share)
Basic income per common share (in dollars per share)
Earnings Per Share, Basic
Diluted (in dollars per share)
Diluted net income per common share (in dollars per share)
Diluted income per common share (in dollars per share)
Earnings Per Share, Diluted
Income per share of common stock:
Income Per Share of Common Stock
Statutory depletion in excess of cost depletion (as a percent)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Percent
Manufacturing deduction (as a percent)
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent
Effective income tax rate (as a percent)
Income tax expense (as a percent)
Effective Income Tax Rate Reconciliation, Percent
Percent of Pretax Income
Effective Income Tax Rate Reconciliation, Percent [Abstract]
State income taxes, net of federal income tax benefit (as a percent)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
Other (as a percent)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent
Income taxes computed at the federal statutory rate (as a percent)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Total compensation cost not yet recognized
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized
Weighted-average period for recognition of total compensation cost not yet recognized
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Capital expenditures related to environmental matters
Environmental Costs Recognized, Capitalized in Period
Environmental Expenditures
Environmental Remediation Costs Recognized [Abstract]
Environmental Expenditures
Environmental Costs, Policy [Policy Text Block]
Automotive equipment
Equipment [Member]
Equity Component [Domain]
Equity securities and funds
Equity Securities [Member]
Pooled equity funds
Equity Funds [Member]
Fair value
Estimate of Fair Value Measurement [Member]
Extensions and discoveries, net of related costs
Extensions, Discoveries, Additions and Improved Recovery, Less Related Costs
Measurement Frequency [Axis]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value, Hierarchy [Axis]
Recurring
Fair Value, Measurements, Recurring [Member]
Fair Value, Measurement Frequency [Domain]
Fair Values of Financial Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Hierarchy [Domain]
Fair Values of Financial Instruments
Fair Value of Financial Instruments, Policy [Policy Text Block]
Level 1
Fair Value, Inputs, Level 1 [Member]
Significant Other Observable Inputs (Level 2)
Fair Value, Inputs, Level 2 [Member]
Schedule of the entity's financial liabilities measured at fair value on a recurring basis
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]
Accumulated amortization, netted against the intangible assets
Finite-Lived Intangible Assets, Accumulated Amortization
Pooled fixed income funds
Fixed Income Funds [Member]
Successful-Efforts Method Used for Natural Gas Interests
Full Cost or Successful Efforts, Policy [Policy Text Block]
Furniture and fixtures
Furniture and Fixtures [Member]
Furniture and fixtures
Furniture and Fixtures, Gross
Loss (gain) on sale of property, plant and equipment
Gain (Loss) on Disposition of Property Plant Equipment
Gross profit
Gross profit
Gross Profit
Gross profit
Gross Profit [Abstract]
Cash flows approach
Income Approach Valuation Technique [Member]
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Income before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest
Income Statement Location [Axis]
Income Taxes
Income Tax Authority [Domain]
Income Tax Authority [Axis]
Income Taxes
Income Tax Disclosure [Text Block]
Income Statement Location [Domain]
Income tax expense
Income tax expense
Income Tax Expense (Benefit)
Manufacturing deduction
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount
Amount
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income taxes
Income Taxes Paid, Net
Other
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount
Income taxes computed at the federal statutory rate
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Income Taxes
Income Tax, Policy [Policy Text Block]
State income taxes, net of federal income tax benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Statutory depletion in excess of cost depletion
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Amount
Trade receivables, net
Increase (Decrease) in Accounts Receivable
Accounts payable and accrued expenses
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Other liabilities
Increase (Decrease) in Other Operating Liabilities
Changes in operating assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Future development costs
Changes in Estimated Future Development Costs
Net change in income taxes
Changes in Future Income Tax Expense Estimates on Future Cash Flows Related to Proved Oil and Gas Reserves
Inventories
Increase (Decrease) in Inventories
Other assets
Increase (Decrease) in Other Operating Assets
Prepaid expenses and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Changes in standardized measure of discounted future net cash flows
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Changes in proved reserves
Proved Developed and Undeveloped Reserves [Abstract]
Increase (Decrease) in Stockholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Employee and director stock options (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Intangible assets
Intangible Assets, Net (Excluding Goodwill)
Unamortized intangible assets
Interest expense
Interest Expense
Interest costs capitalized
Interest Costs Capitalized
Interest rate hedges
Interest Rate Derivatives [Abstract]
Interest
Interest Paid
Interest rate swaps
Interest Rate Swap [Member]
Interest Rate Cash Flow Hedge Liability at Fair Value
Interest rate swap liabilities
Interest rate swap liabilities
Total inventories
Inventories
Inventory, Net
Lime and limestone inventories:
Inventory, Net [Abstract]
Finished goods
Inventory, Finished Goods, Net of Reserves
Raw materials
Inventory, Raw Materials, Net of Reserves
Inventories
Inventory Disclosure [Text Block]
Inventories
Inventory, Policy [Policy Text Block]
Inventories
Inventories
LIBOR
London Interbank Offered Rate (LIBOR) [Member]
Letters of credit outstanding
Letters of Credit Outstanding, Amount
Long-term Debt, Type [Axis]
Revolving Facility
Long-term Debt, Type [Domain]
O & G Lease
Lease Agreements [Member]
Total lease and rent expense
Operating Leases, Rent Expense
Total current liabilities
Liabilities, Current
Total liabilities and stockholders' equity
Liabilities and Equity
Current liabilities:
Liabilities, Current [Abstract]
Total liabilities
Liabilities
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities and Equity [Abstract]
Commitment fee (as a percent)
Line of Credit Facility, Commitment Fee Percentage
Maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Summary of outstanding debt
Long-term Debt, Unclassified [Abstract]
Debt
Debt
Long-term Debt
2015
Long-term Debt, Maturities, Repayments of Principal in Year Two
2017
Long-term Debt, Maturities, Repayments of Principal in Year Four
2015
Long-term Debt, Maturities, Repayments of Principal in Year Three
Principal amounts payable on the long-term debt outstanding
Long-term Debt, Fiscal Year Maturity [Abstract]
Less current installments
Current installments of debt
Long-term Debt, Current Maturities
Debt, excluding current installments
Total
Long-term Debt, Excluding Current Maturities
2014
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months
Machinery and equipment
Machinery and Equipment, Gross
Machinery and equipment
Machinery and Equipment [Member]
Maximum
Maximum [Member]
Mineral reserves and land
Mineral Properties, Gross
Minimum
Minimum [Member]
Natural Gas Liquids (MMBLS)
Natural Gas Liquids [Member]
Natural Gas (BCF)
Natural Gas [Member]
Organization
Nature of Operations [Text Block]
Financing Activities:
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Net change in sales prices and production costs
Net Increase (Decrease) in Sales and Transfer Prices and Production Costs
Operating Activities:
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net (decrease) increase in cash and cash equivalents
Net Cash Provided by (Used in) Continuing Operations
Net income
Net income
Income for basic and diluted income per common share (in dollars)
Net income for basic and diluted income per common share
Net Income (Loss) Available to Common Stockholders, Basic
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities, Continuing Operations
Numerator:
Net Income (Loss) Attributable to Parent [Abstract]
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities, Continuing Operations
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities, Continuing Operations
Investing Activities:
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
New Accounting Pronouncements
New Accounting Pronouncements
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]
Total other expense (income)
Nonoperating Income (Expense)
Other expense (income):
Nonoperating Income (Expense) [Abstract]
Number of business segments
Number of Operating Segments
Natural gas interests
Revenues
Oil and Gas Revenue
Supplementary Financial Information for Oil and Gas Producing Activities
Oil and Gas Exploration and Production Industries Disclosures [Text Block]
Supplementary Financial Information for Oil and Gas Producing Activities
Less: accumulated depreciation and depletion
Oil and Gas Property, Successful Effort Method, Accumulated Depreciation, Depletion and Amortization
Net capitalized costs for natural gas properties
Oil and Gas Property, Successful Effort Method, Net
Thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Future minimum payments under operating leases
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017
Operating Leases, Future Minimum Payments, Due in Four Years
2018
Operating Leases, Future Minimum Payments, Due in Five Years
2016
Operating Leases, Future Minimum Payments, Due in Three Years
2014
Operating Leases, Future Minimum Payments Due, Next Twelve Months
Operating profit
Operating Income (Loss)
Operating Loss Carryforwards [Table]
Operating loss carry forwards
Operating Loss Carryforwards [Line Items]
2015
Operating Leases, Future Minimum Payments, Due in Two Years
Net operating loss
Operating Loss Carryforwards
Basis of Presentation
Comprehensive income (loss), tax expense (benefit)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax
Deferred income tax expense
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent
Comprehensive income (loss), net of tax
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax
Other assets, net
Total
Other Assets, Noncurrent
Other
Other Assets, Miscellaneous, Noncurrent
Other Assets
Other Assets [Abstract]
Mark to market of interest rate hedges
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
Service parts inventories
Other Inventory, Net of Reserves
Other, net
Other Nonoperating Income (Expense)
Other liabilities
Other Liabilities, Noncurrent
Other investments
Other Investments [Member]
Other comprehensive income
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent
Mark to market of interest rate hedges, tax expense
Minimum pension liability adjustments, net of tax expense (benefit) of $112, $36 and ($85), for 2013, 2012 and 2011, respectively
Minimum pension liability adjustment, net of tax expense (benefit) of $112, 36 and 85, for 2013, 2012 and 2011, respectively
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent
Mark to market of interest rate hedges, net of tax expenses of $83 an d $107 for 2014 and 2013, respectively
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent
Mark to market of interest rate hedges, net of tax expense (benefit) of $398, $312 and $89 for 2013, 2012 and 2011, respectively
Total other comprehensive income
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Minimum pension liability adjustments
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent
Minimum pension liability adjustments, tax expense (benefit)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent
Lender's prime rate
Prime Rate [Member]
Quarterly settlement payment pursuant to hedges
Payments for Hedge, Investing Activities
Purchase of treasury shares
Purchase of treasury shares
Payments for Repurchase of Common Stock
Capital expenditures
Payments to Acquire Productive Assets
Cash dividends paid
Payments of Ordinary Dividends, Common Stock
Cash dividends paid
Purchase of property, plant and equipment
Payments to Acquire Property, Plant, and Equipment
Corson Plan
Pension Plan, Defined Benefit [Member]
Pension and Other Postretirement Benefits Disclosure [Text Block]
Employee Retirement Plans
Percentage of Debt Hedged by Interest Rate Derivatives
Percentage of outstanding balance of debt hedged
Plan Asset Categories [Domain]
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share
Preferred stock, $5.00 par value; authorized 500,000 shares; none issued or outstanding
Preferred Stock, Value, Issued
Preferred stock, shares issued
Preferred Stock, Shares Issued
Preferred stock, authorized shares
Preferred Stock, Shares Authorized
Preferred stock, shares outstanding
Preferred Stock, Shares Outstanding
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Previously estimated development costs incurred
Previously Estimated Development Costs Incurred During Period
Proceeds from exercise of stock options
Proceeds from Stock Options Exercised
Proceeds from sale of property, plant and equipment
Proceeds from Sale of Property, Plant, and Equipment
Estimated useful lives of property, plant and equipment
Property, Plant and Equipment, Useful Life
Property, plant and equipment:
Property, Plant and Equipment, Net [Abstract]
Property, plant and equipment
Property, plant and equipment
Property, Plant and Equipment, Gross
Property, Plant and Equipment
Property, Plant and Equipment, Policy [Policy Text Block]
Property, plant and equipment, net
Property, plant and equipment, net
Property, Plant and Equipment, Net
Property, Plant and Equipment
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Axis]
Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table]
Revisions of previous estimates
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates
Extensions and discoveries
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions
Proved reserves - beginning of year
Proved reserves - end of year
Proved Developed and Undeveloped Reserves, Net
Proved developed reserves - end of year
Proved Developed Reserves (Volume)
Production
Proved Developed and Undeveloped Reserves, Production
Proved natural gas properties, successful-efforts method
Natural gas properties - proved
Proved Oil and Gas Property, Successful Effort Method
Additions
Provision for Doubtful Accounts
Summary of Quarterly Financial Data (unaudited)
Quarterly Financial Information [Text Block]
Summary of Quarterly Financial Data (unaudited)
Range [Axis]
Range [Domain]
Repayments of term loans
Repayment of debt
Repayments of Long-term Debt
Petroleum Reserves [Axis]
Reserve Quantities
Reserve Quantities [Line Items]
Restricted stock
Restricted Stock [Member]
Schedule of results of operations from oil and gas producing activities
Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block]
Production and operating costs
Natural gas interests
Results of Operations, Production or Lifting Costs
Results of operations before income taxes
Results of Operations, Income before Income Taxes
Income tax expense
Results of Operations, Income Tax Expense
Results of operations (excluding corporate overhead and interest costs)
Results of Operations, Oil and Gas Producing Activities Net Income (Excluding Corporate Overhead and Interest Costs)
Depreciation and depletion
Results of Operations, Depreciation, Depletion and Amortization, and Valuation Provisions
Results of Operations
Results of Operations, Oil and Gas Producing Activities Net Income (Excluding Corporate Overhead and Interest Costs) [Abstract]
Retained Earnings
Retained Earnings [Member]
Retained earnings
Retained Earnings (Accumulated Deficit)
Revenue Recognition
Revenue Recognition [Abstract]
Revenue Recognition
Revenue Recognition, Policy [Policy Text Block]
Lime and limestone operations
Revenue Mineral Sales
Net change due to changes in quantity estimates
Revisions of Previous Quantity Estimates
Revolving Facility
Revolving Credit Facility [Member]
Non-vested stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares
Total fair value of stock options vested during the year
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value
Exercisable at the end of the period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
Expected life
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Weighted-average remaining contractual life of the outstanding and exercisable stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Weighted-average remaining contractual life for stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Revenues
Total revenues
Revenue, Net
Sales of natural gas produced, net of production costs
Sales and Transfers of Oil and Gas Produced, Net of Production Costs
Revenues
Revenue, Net [Abstract]
Scenario, Unspecified [Domain]
Comprehensive Income (Loss) [Table Text Block]
Schedule of components of comprehensive income
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of components of the Corson Plan net periodic benefit cost
Schedule of Net Benefit Costs [Table Text Block]
Schedule of funded status of the Corson Plan accrued pension benefit obligation
Schedule of Net Funded Status [Table Text Block]
Schedule of supplemental cash flow information
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Schedule of changes in standardized measure of discounted future net cash flows
Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows [Table Text Block]
Schedule of asset allocation for the Plan
Schedule of Allocation of Plan Assets [Table Text Block]
Schedule of income tax expense
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of principal amounts payable on long-term debt outstanding
Schedule of Maturities of Long-term Debt [Table Text Block]
Schedule of inventories
Summary of inventories
Schedule of Inventory, Current [Table Text Block]
Schedule of reconciliation of income taxes computed at the federal statutory rate to income tax expense
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Summary of the Company's deferred tax liabilities and assets
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Summary of the Company's stock option and restricted stock activity
Schedule of Share-based Compensation, Activity [Table Text Block]
Schedule of net liability recognized for the Corson Plan on the Company's Consolidated Balance Sheets
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
Summary of unaudited quarterly financial data
Schedule of Quarterly Financial Information [Table Text Block]
Schedule of computation of basic and diluted income per common share
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule of weighted-average assumptions used in the measurement of the Corson Plan benefit obligation
Schedule of Assumptions Used [Table Text Block]
Schedule of accumulated other comprehensive loss
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Summary of outstanding debt
Schedule of Long-term Debt Instruments [Table Text Block]
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of operating results and certain other financial data for the business segments
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Summary of changes in proved reserves
Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table Text Block]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of other assets
Schedule of Other Assets, Noncurrent [Table Text Block]
Schedule of Segment Reporting Information, by Segment [Table]
Business segments
Segment Reporting Information [Line Items]
Segments [Domain]
Business Segments
Business Segments
Segment Reporting Disclosure [Text Block]
Selling, general and administrative expense
Selling, General and Administrative Expenses [Member]
Selling, general and administrative expenses
Selling, General and Administrative Expense
Additional disclosures
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Weighted-Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Granted (in dollars per share)
Granted (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Non-vested at the beginning of the period (in shares)
Non-vested at the end of the period (in shares)
Vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Stock-based compensation
Share-based Compensation
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee
Maximum number of awards that may be received by an individual in any one calendar year (in shares)
Vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Weighted-Average Grant-Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Granted (in shares)
Stock-based compensation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested at the end of the period (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Non-vested at the beginning of the period (in dollars per share)
Forfeited (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Forfeited (in shares)
Exercised (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Exercisable at the end of the period (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Dividend yield (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Total fair value of restricted stock vested during the year
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Vested (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Exercisable at the end of the period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Number of shares of common stock remaining available for future grants of stock options, restricted stock or other forms of stock-based compensation under the 2001 Plan
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Total intrinsic value of stock options exercised during the year
Exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Volatility factor (as a percent)
Number of shares of common stock that may be subject to outstanding awards granted under the 2001 Plan
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Risk-free interest rates (as a percent)
Weighted-average assumptions used to estimate the fair value for the stock options
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Weighted-average fair value of stock options granted during the year (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)
Outstanding at the end of the period (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
Stock-Based Compensation
Outstanding at the beginning of the period (in shares)
Outstanding at the end of the period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Outstanding at the end of the period
Outstanding at the beginning of the period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Equity Award [Domain]
Balances (in shares)
Balances (in shares)
Shares, Outstanding
External freight billed to customers included in revenue
Shipping and Handling Revenue
Accounting Policies
Significant Accounting Policies [Text Block]
Timing of production of reserves and other
Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Other
Standardized measure - beginning of year
Standardized measure - end of year
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves
Schedule of standardized measure of discounted future net cash flows
Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block]
Scenario [Axis]
Statement [Table]
Statement
Statement [Line Items]
Consolidated Statements of Stockholders' Equity
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Equity Components [Axis]
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
CONDENSED CONSOLIDATED BALANCE SHEETS
Segments [Axis]
Stock Issued During Period, Shares, Period Increase (Decrease)
Stock options exercised, including $29 tax benefit for period ended 2009.
Stock options exercised
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)
Stock-based compensation (in shares)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures
Stock options exercised (in shares)
Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Stock-based compensation
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures
Stockholders' equity:
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity, Period Increase (Decrease)
Total stockholders' equity
Balances
Balances
Stockholders' Equity Attributable to Parent
Accumulated Other Comprehensive Loss
Subsequent Event
Subsequent Events [Text Block]
Subsequent Event
Subsequent Event [Table]
Subsequent event
Subsequent Event [Line Items]
Subsequent event
Subsequent Event [Member]
Subsequent Event Type [Domain]
Subsequent Event Type [Axis]
U.S. Lime O & G
Subsidiaries [Member]
Supplemental cash flow information
Supplemental Cash Flow Information [Abstract]
Treasury shares purchased
Treasury Stock, Value, Acquired, Cost Method
Treasury shares purchased (in shares)
Treasury Stock, Shares, Acquired
Treasury stock, shares
Treasury Stock, Shares
Treasury Stock
Treasury Stock [Member]
Less treasury stock, at cost
treasury stock, at cost (in dollars)
Treasury Stock, Value
Type of Reserve [Domain]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Valuation Technique [Axis]
Valuation Technique [Domain]
Variable Rate [Domain]
Variable Rate [Axis]
Weighted-average
Weighted Average [Member]
Denominator:
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Effect of dilutive securities:
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Weighted-average shares for basic income per share
Weighted-average shares for basic income per common share
Weighted Average Number of Shares Outstanding, Basic
Adjusted weighted-average shares and assumed exercises for diluted income per share
Weighted Average Number of Shares Outstanding, Diluted