Document And Entity Information [Abstract] Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Trading Symbol Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Condensed Consolidated Statements Of Income [Abstract] Sales Revenue, Services, Net Sales Revenue, Services, Net, Total Revenues Cost of Services Cost of Services, Total Cost of revenues Gross Profit Gross profit Selling, General and Administrative Expense Selling, general and administrative expenses Selling, General and Administrative Expense, Total Operating Income (Loss) Operating income Other income (expense): Interest Expense Interest expense Interest expense Interest Expense, Total Investment Income, Interest Interest income Other Nonoperating Income (Expense) Other Other Nonoperating Income (Expense), Total Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for federal, state and foreign income taxes Income before income tax expense Provision for federal, state and foreign income taxes Income Tax Expense (Benefit) Provision for federal, state and foreign income taxes Income Tax Expense (Benefit), Total Net income Net income Basic earnings per common share Earnings Per Share, Basic, Total Earnings Per Share, Diluted Diluted earnings per common share Earnings Per Share, Diluted, Total Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number of Shares Outstanding, Diluted Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Condensed Consolidated Balance Sheets [Abstract] Assets Cash and cash equivalents Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value, Total Accounts receivable, less allowances (September 30, 2011 - $1,276 and June 30, 2011 - $1,428) Accounts receivable, less allowances (December 31, 2011-$1,457 and June 30, 2011-$1,428) Accounts Receivable, Net, Current, Total Costs in Excess of Billings on Uncompleted Contracts or Programs Expected to be Collected within One Year Costs and estimated earnings in excess of billings on uncompleted contracts Inventory Net Inventories Inventory, Net, Total Deferred income taxes Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred Tax Assets, Net, Current, Total Other current assets Total current assets Total current assets Property, plant and equipment at cost: Land Buildings And Improvements Gross Land Buildings And Improvements Gross Land and buildings MachineryAndEquipmentGross Machinery and Equipment, Gross, Total Construction equipment Transportation Equipment Gross Transportation Equipment Gross Transportation equipment Office equipment and capitalized computer software gross. Office Equipment and Capitalized Computer Software Gross Office equipment and software Construction in progress Property, plant and equipment at cost, gross Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, plant and equipment at cost, gross Property, plant and equipment at cost, gross Accumulated depreciation Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Property Plant And Equipment Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, plant and equipment at cost, net Goodwill. Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill Goodwill, Total Other intangible assets Intangible Assets, Net (Excluding Goodwill), Total Other assets Other Assets, Noncurrent, Total Total assets Total assets Liabilities and stockholders' equity Accounts payable Accounts Payable, Current, Total Billings in Excess of Cost Billings on uncompleted contracts in excess of costs and estimated earnings Billings in Excess of Cost, Total Accrued insurance Accrued wages and benefits Employee-related Liabilities, Current, Total Other accrued expenses Other Liabilities, Current, Total Total current liabilities Total current liabilities Deferred Tax Liabilities Noncurrent Deferred income taxes Business Acquisition, Purchase Price Allocation, Noncurrent Liabilities, Long-term Debt Acquisition payable Total liabilities Total liabilities Commitments And Contingencies 2009 Commitments and contingencies Stockholders' equity: Common stock - $.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of September 30, 2011, and June 30, 2011 Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common stock-$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of December 31, 2011, and June 30, 2011 Common Stock, Value, Issued, Total Additional paid-in capital Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Total Retained earnings Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Beginning Balance Accumulated other comprehensive income Total Stockholders' Equity Before Treasury Stock Total stockholders' equity before treasury stock Less: Treasury stock, at cost - 1,469,578 shares as of December 31, 2010, and 1,546,512 shares as of June 30, 2010 Less: Treasury stock, at cost-2,169,927 shares as of December 31, 2011, and 1,417,539 shares as of June 30, 2011 Treasury Stock, Value, Ending Balance Treasury Stock, Value, Beginning Balance Total stockholders' equity Balances Balances Total stockholders' equity Total liabilities and stockholders' equity Total liabilities and stockholders' equity Accounts receivable, allowance Allowance for Doubtful Accounts Receivable, Current, Ending Balance Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Accounts receivable, allowances Common stock, par value Common stock, shares authorized Common stock, shares issued Common Stock, Shares, Issued, Total Treasury stock, shares Treasury Stock, Shares, Ending Balance Treasury Stock, Shares, Beginning Balance Condensed Consolidated Statements Of Cash Flows [Abstract] Operating activities: Adjustments to reconcile net income to net cash provided (used) by operating activities: Depreciation and amortization Depreciation, Depletion and Amortization, Total Deferred Income Tax Expense (Benefit) Deferred income tax Deferred Income Tax Expense (Benefit), Total Loss(gain) on sale of property, plant and equipment Loss (gain) on sale of property, plant and equipment Gain (Loss) on Sale of Property Plant Equipment, Total Allowance for uncollectible accounts Allowance for uncollectible accounts Stock-based compensation expense Share-based Compensation, Total Other Other Other Noncash Income (Expense), Total Changes in operating assets and liabilities increasing (decreasing) cash: Accounts receivable Accounts receivable Increase Decrease In Costs And Estimated Earnings In Excess Of Billings On Uncompleted Contracts Increase Decrease In Costs And Estimated Earnings In Excess Of Billings On Uncompleted Contracts Costs and estimated earnings in excess of billings on uncompleted contracts Costs and estimated earnings in excess of billings on uncompleted contracts Costs and estimated earnings in excess of billings on uncompleted contracts Inventories Inventories Increase (Decrease) in Inventories, Total Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Other Operating Assets, Total Prepaid expenses and other assets Increase Decrease In Accounts Payable Accounts payable Accounts payable Increase (Decrease) in Accounts Payable, Total Increase Decrease In Billing In Excess Of Cost Of Earnings Billings on uncompleted contracts in excess of costs and estimated earnings Billings on uncompleted contracts in excess of costs and estimated earnings Accrued expenses Accrued expenses Increase (Decrease) in Accrued Liabilities, Total Net cash provided (used) by operating activities Net cash used by operating activities Investing activities: Acquisition of property, plant and equipment Acquisition of property, plant and equipment Payments to Acquire Property, Plant, and Equipment, Total Proceeds from Sale of Productive Assets Proceeds from asset sales Proceeds from Sale of Productive Assets, Total Net cash used by investing activities Net cash used by investing activities Financing activities: Issuances of common stock Capital lease payments Capital lease payments Excess Tax Benefit from Share-based Compensation, Financing Activities Tax benefit of exercised stock options Payment of debt amendment fees Payment of debt amendment fees Proceeds from Stock Plans Treasury shares purchased by Employee Stock Purchase Plan Purchase of treasury shares Open market purchase of treasury shares Payments for Repurchase of Other Equity Other treasury share purchases Other treasury share purchases Net Cash Provided By Used In Financing Activities Net cash used by financing activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents, Total Net increase (decrease) in cash and cash equivalents Net decrease in cash and cash equivalents Supplemental Cash Flow Information Supplemental disclosure of cash flow information: Income Taxes Paid Net Income Taxes Paid, Net, Total Income taxes Interest Interest Paid, Total Non-cash investing and financing activities: Purchases of property, plant and equipment on account Purchases of property, plant and equipment on account Condensed Consolidated Statements Of Changes In Stockholders' Equity And Comprehensive Income [Abstract] Statement, Equity Components [Axis] Common Stock [Member] Common Stock [Member] Additional Paid In Capital [Member] Additional Paid-In Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Treasury Stock [Member] Treasury Stock [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income(Loss) [Member] Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total Other comprehensive income (loss) Comprehensive Income, Net of Tax, Attributable to Parent Comprehensive income Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Exercise of stock options Exercise of stock options Adjustments to Additional Paid in Capital, Tax Effect from Share-based Compensation Tax effect of exercised stock options and the vesting of deferred shares Tax effect of exercised stock options and vesting of deferred shares Issuance Of Deferred Shares Issuance Of Deferred Shares Issuance of deferred shares Stock Issued During Period, Value, Employee Stock Purchase Plan Employee Stock Purchase Plan share purchase Treasury Stock, Value, Acquired, Cost Method Open market purchase of treasury shares Purchase of treasury shares Other treasury share purchases. Other Treasury Share Purchases Other treasury share purchases Other treasury share purchases Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Total Stock Issued During Period, Shares, Stock Options Exercised Exercise of stock options Deferred Shares Issued Deferred Shares Issued Issuance of deferred shares Stock Issued During Period, Shares, Employee Stock Purchase Plans Employee stock purchase plans, shares Treasury Stock, Shares, Acquired Treasury share purchases Other treasury shares acquired. Other Treasury Shares Acquired Other treasury shares Basis Of Presentation [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis Of Presentation Recently issued statements of financial accounting standards [abstract] Recently Issued Statements Of Financial Accounting Standards [Abstract] Recently Issued Statements of Financial Accounting Standards [Abstract] Recently issued statements of financial accounting standards [text block]. Recently Issued Statements of Financial Accounting Standards [Text Block] Recently Issued Statements Of Financial Accounting Standards Uncompleted Contracts [Abstract] Uncompleted Contracts Disclosure [Text Block] Uncompleted Contracts Disclosure [Text Block] Uncompleted Contracts Intangible Assets Including Goodwill [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Intangible Assets Including Goodwill Debt [Abstract] Debt Disclosure [Text Block] Debt Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Commitments And Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies Other Comprehensive Income [Abstract] Comprehensive Income Note [Text Block] Other Comprehensive Income Earnings Per Common Share [Abstract] Earnings Per Share [Text Block] Earnings Per Common Share Segment Information [Abstract] Segment Reporting Disclosure [Text Block] Segment Information Equity Component [Domain] Equity Component [Domain] Parent [Member] Parent [Member]