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Commitments And Contingencies (Details) (USD $)
 12 Months Ended
Sep. 30, 2012
respparties
Sep. 30, 2011
Site Contingency [Line Items]    
Site Contingency, Number of Other Potentially Responsible Parties, commenced clean up work 4  
Loss Contingency, Number of Defendants 8  
Accrued Insurance $ 5,229,000 $ 7,040,000
Reserve for construction defect liabilities 756,000  
Estimated cost of completion of bonded project 67,177,000  
Outstanding amount to collateralize our obligations 1,000,000  
Outstanding letters of credit was to collateralize vendors 630,000  
Loss Contingency, Settlement Agreement, Date 2012-08-07  
Outstanding letters of credit that were utilized as collateral 6,218,000  
Ward Transformer Site [Member]
    
Site Contingency [Line Items]    
Loss Contingency, Number of Defendants 50  
TekWorks [Member]
    
Site Contingency [Line Items]    
Loss Contingency Settlement Agreement Consideration 1 1,250,000  
Accrued Liability Related To Legal Settlements 1,230,000  
Surety [Member]
    
Site Contingency [Line Items]    
Settlement agreement with regard to collateral held by a surety 2,000,000  
Loss Contingency, Settlement Agreement, Consideration 2,200  
Right to receive compensation in an event of default 2,450,000  
Receipt of payments 175,000  
Loss contingency other Income 1,825,000  
Loss Contingency, Settlement Agreement, Terms . On August 7, 2012, we reached an amended agreement with the surety and did not file the agreed judgment. The amended agreement provides for additional collateral and calls for the total settlement amount of $2,025 ($2,200 less the $175 already received) to be paid in monthly installments beginning September 30, 2012 through July 2014 with an interest rate of 12%  
Additional Income Earned If Settlement Goes Into Default 450,000  
Minimum [Member]
    
Site Contingency [Line Items]    
Risk of loss from collection of debt 0  
Maximum [Member]
    
Site Contingency [Line Items]    
Risk of loss from collection of debt $ 1,725,000