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Commitments And Contingencies (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2013
Sep. 30, 2014
Commitments And Contingencies [Abstract]      
Accrued Insurance $ 3,990   $ 4,560
Liability for Claims and Claims Adjustment Expense 498   $ 569
Estimated cost of completion of bonded project $ 65,800    
Purchase Commitment [Member]      
Purchase Commitment Excluding Long term Commitment [Line Items]      
Purchase Commitment Description purchase of copper wire    
Purchase Commitment Amount $ 112    
Insurance Related [Member]      
Other Commitments [Line Items]      
Letters of Credit Outstanding, Amount 6,347    
Vendor Related [Member]      
Other Commitments [Line Items]      
Letters of Credit Outstanding, Amount $ 571    
Surety Bond [Member]      
Loss Contingency [Line Items]      
Receipt of payments   $ 550