Lime and Limestone Operations Lime and limestone operations Revenue related to the production and sale of PLS, quicklime, hydrated lime and lime slurry forming a principal portion of the entity's revenue. Natural Gas Interests Natural gas interests Revenue related to the royalty and non-operating working interests in wells drilled on the land and also quantity of natural gas developed and produced from the oil and gas properties. Labor and Other Operating Expenses Labor and other operating expenses This element represent labour and other operating expenses during the reporting period. 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. 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. Nonoperating Income (Expense), Net, Percentage 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. 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. Natural Gas Interests, Net, Percentage Natural gas interests (as a percent) The percentage of revenue from Natural Gas Interests to total net revenue from the sale of goods as of year end. 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. 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. Depreciation Depletion and Amortization, Net, Percentage 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. 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. 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. Selling, General and Administrative Expenses, Net, Percentage Selling, general and administrative expenses (as a percent) Selling, General and Administrative Expenses, Net, Percentage 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. 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), 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. Net Cash Provided by (Used in) Continuing Operations Net increase in cash and cash equivalents Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash used in financing activities Organization Banking Facilities Net Income (Loss) Available to Common Stockholders, Basic, Net, Percentage Net income (as a percent) This element represents Net Income (Loss) Available to Common Stockholders, Basic, Net, Percentage. Banking Facilities and Other Debt Disclosure [Text Block] Banking Facilities This element represent banking facilities and other debt. Document and Entity Information CONDENSED CONSOLIDATED BALANCE SHEETS Statement [Table] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Statement [Line Items] Statement Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Accounts Receivable, Net, Current Trade receivables, net Inventory, Net Inventories Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant and Equipment, Gross Property, plant and equipment, at cost Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less accumulated depreciation and depletion Property, Plant and Equipment, Net Property, plant and equipment, net Other Assets, Noncurrent Other assets, net Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued expenses Liabilities, Current Total current liabilities Long-term Debt, Current Maturities Current installments of debt Long-term Debt, Excluding Current Maturities Debt, excluding current installments Deferred Tax Liabilities, Noncurrent Deferred tax liabilities, net Other Liabilities, Noncurrent Other liabilities Liabilities Total liabilities Net income Net Income (Loss) Available to Common Stockholders, Basic Net income Common Stock, Value, Issued Common stock Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Retained earnings Treasury Stock, Value Less treasury stock, at cost Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Liabilities and Equity Total liabilities and stockholders' equity Gross Profit Gross profit Selling, General and Administrative Expense Selling, general and administrative expenses Operating Income (Loss) Operating profit Nonoperating Income (Expense) [Abstract] Other expense (income): Interest Expense Interest expense Other Nonoperating Income (Expense) Other, net Nonoperating Income (Expense) Total other expense (income) Income Tax Expense (Benefit) Income tax expense Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Income Per Share of Common Stock Income per share of common stock: Earnings Per Share, Basic Basic (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Revenue, Net [Abstract] Revenues Revenue, Net Total revenues Cost of Goods and Services Sold [Abstract] Cost of revenues: Cost of Goods and Services Sold Total cost of revenues Depreciation, Depletion and Amortization, Nonproduction Depreciation, depletion and amortization Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS 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 operating activities: Depreciation, Depletion and Amortization Depreciation, depletion and amortization Amortization of Financing Costs Amortization of deferred financing costs Deferred Income Tax Expense (Benefit) Deferred income taxes Share-based Compensation Stock-based compensation Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Trade receivables Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Increase (Decrease) in Other Operating Liabilities Other liabilities Gain (Loss) on Sale of Property Plant Equipment Gain on disposition of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Purchase of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of property, plant and equipment Repayments of Long-term Debt Repayments of term loans Payments for Repurchase of Common Stock Purchase of treasury shares Proceeds from Stock Options Exercised Proceeds from exercise of stock options Repayments of revolving credit facilities, net Repayments of Lines of Credit CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Basis of Presentation Basis of Accounting [Text Block] Basis of Presentation Nature of Operations [Text Block] Organization Accounting Policies Significant Accounting Policies [Text Block] Accounting Policies Business Segments Segment Reporting Disclosure [Text Block] Business Segments Earnings Per Share [Text Block] Income Per Share of Common Stock Comprehensive Income and Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Comprehensive Income and Accumulated Other Comprehensive Loss Inventories Inventory Disclosure [Text Block] Inventories Contingencies Commitments and Contingencies Disclosure [Text Block] Contingencies Income Taxes Income Tax Disclosure [Text Block] Income Taxes Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Amendment Description Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Stockholders' Equity Attributable to Parent Total stockholders' equity Operating Activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Investing Activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Financing Activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]