Summary Of Significant Accounting (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)
Summary Of Significant Accounting Policies [Abstract]
Allowance for Doubtful Accounts Receivable	$ 736	$ 842	$ 780
Expense of debt issuance costs	345	317	$ 385
Unamortized Debt Issuance Expense	976	1,031
Loss Contingency, Undiscounted Amount of Insurance-related Assessment Liability	5,223	4,465
Accrued Insurance	$ 5,464	$ 4,518
LossContingencyAccrualInsuranceRelatedAssessmentDiscountRate	1.10%	1.40%
Deferred Tax Assets (Liabilities), Net	$ 93,549	$ 202
Number Of Single Customers Comprising More Than Ten Percent Of Consolidated Net Sales	0
Other Commitments [Line Items]
Letters of Credit Outstanding, Amount	$ 6,944
Insurance Related [Member]
Other Commitments [Line Items]
Letters of Credit Outstanding, Amount	$ 6,126