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Commitments And Contingencies (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Commitments And Contingencies [Abstract]    
Accrued Insurance $ 5,703 $ 5,464
Liability for Claims and Claims Adjustment Expense 226 235
Estimated cost of completion of bonded project 53,281  
Insurance Related [Member]    
Other Commitments [Line Items]    
Letters of Credit Outstanding, Amount 6,176  
Vendor Related [Member]    
Other Commitments [Line Items]    
Letters of Credit Outstanding, Amount 458 $ 818
Capstone [Member]    
Loss Contingency [Line Items]    
Loss Contingency, Damages Sought, Value $ 10,406  
LossContingencyOpinionOfCounsel To date, the Company has not established a reserve with respect to this matter, as we believe the likelihood of our responsibility for damages is not probable and a potential range of exposure is not reasonably estimable.