XML 93 R78.htm IDEA: XBRL DOCUMENT v3.8.0.1
Commitments And Contingencies (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2017
Mar. 31, 2018
Aug. 31, 2017
Sep. 30, 2016
Commitments And Contingencies [Abstract]        
Accrued Insurance $ 6,204     $ 5,464
Liability for Claims and Claims Adjustment Expense 218     $ 235
Estimated cost of completion of bonded project 35,389      
Other Commitments [Line Items]        
Letters of Credit Outstanding, Amount 6,493      
Insurance Related [Member]        
Other Commitments [Line Items]        
Letters of Credit Outstanding, Amount 5,985      
Vendor Related [Member]        
Other Commitments [Line Items]        
Letters of Credit Outstanding, Amount $ 508      
USAMRIID [Member]        
Loss Contingencies [Line Items]        
Loss Contingency Name Of Plaintiff IES Commercial, Inc.      
Loss Contingency Opinion Of Counsel Given the uncertainty litigation poses, the Company has not recorded any recovery in connection with this claim. There can be no assurance that the Company will prevail in this litigation matter or that, if the Company does prevail, it will receive an amount substantially similar to the amount sought or not receive a significantly lower award.      
Unbilled Change Orders     $ 21,000  
Contract Revenue Earned To Date $ 61,146      
USAMRIID [Member] | Scenario Forecast [Member]        
Loss Contingencies [Line Items]        
Unbilled Change Orders   $ 4,500